Thom Bates
12-12-2006, 05:40 PM
PURE STREET
NMRA SERIES 2007 RULES
Preliminary Version 1.1
Class Overview
Pure Street is designed for naturally aspirated small block 1979 and newer Ford Fox Chassis and 2005 to present Mustang bodied and Ford powered vehicles. Pure Street entries are limited to 302, and 2V/3V/4V 4.6L modular engine types. 5.0L engines are permitted a maximum of 313 cubic inches. 4.6L engines are permitted a maximum of 291 cubic inches. Pure Street class will be held at all NMRA events during the 2006season.
Qualifying Information, Ladder Type, & Tree
All Run, NHRA Sportsman Ladder, Pro .400 tree, Heads-Up.
Accepted Products Deadline: NMRA will accept requests from manufacturers to have new products considered for addition to 2007 accepted lists only up until January 1, 2007. After this date, NMRA will consider manufacturer requests for new products for the 2008 season.
Base Weights:
ENGINE POWER ADDER BASE CI BASE WEIGHT
5.0L None 311 3100
4.6 2V None 289 2700
4.6 3V None 289 2900
4.6 4V None 289 3000
Maximum Cubic Inch – 313 ci
AOD combinations may deduct 50-lbs.
Carburetor applications – add 75-lbs to base weight. See section 1.19
TFS Twisted Wedge cylinder heads – add 50# to base weight. See section 1.17
Note: 15 lbs/cu in penalty applies for cubic inches over base weight break.
Note: All weights are with driver at conclusion of run at scale area.
Class Rules, PURE STREET
1.1 COOLING SYSTEM
RADIATOR: OEM production-style or aftermarket radiator is required and must be mounted in stock location. Stock core support is required.
Water pump: Any aftermarket (belt drive or electric drive) pump permitted.
COOLING FANS: Any permitted.
1.2 Engine
ENGINE: Engine limited to 302W (5.0) and 4.6L modular engine types. 302 Windsor type engines and 4.6L engines may be used in any 1979 and newer Fox based chassis. Engine swapping permitted during event.
1.2a) ENGINE DRIVE BELT SYSTEM: Factory style 6 rib drive belt system required. 6-rib belt required. Minimum crankshaft pulley diameter – 3-inch.
1.3 Exhaust
EXHAUST: All entries allowed to use tubular headers. Adapter plates to bolt headers to cylinder head permitted, maximum thickness .500-inch. Exhaust must be directed out of car body, away from driver and fuel tank. All exhaust gases released from engine must pass through entire exhaust system.
1.3a) HEADERS & COLLECTORS: All entries allowed to use tubular headers, maximum tubing size 1.75”.
1.3b) EXHAUST TUBING/SIZE: Maximum exhaust pipe diameter – 2.5-inch up to gas tank, 3-inch from gas tank rearward (tailpipe).
1.3c) TAILPIPE & EXHAUST RULES: Full exhaust system required. Tailpipes must exit within 12-inch of rearend centerline housing.
1.3d) MUFFLER REQUIREMENTS: Commercially available (generally available through retail locations) mufflers required.
A maximum of two (2) mufflers is allowed. A maximum of one (1) inlet and one (1) outlet is permitted. Mufflers may have a maximum of 2.5-inch inlet & outlet.
1.5 FUEL-DELIVERY SYSTEM
DELIVERY SYSTEM: Electric or mechanical fuel pumps permitted. Pressure regulators, and any line size permitted. All fuel lines must originate and return to a single, non-segmented, fuel cell or OEM fuel tank. Fuel pump must shut off with a master electrical switch. Any method of artificially heating or cooling fuel prohibited (cool cans, ice, wet rags, Freon, etc.). A valve for removal of fuel (gasoline) during technical inspections is mandatory. Valve must be installed between carburetor/injection and regulator, and should be installed in such a manner that allows a cup to be placed to catch fuel removed from the line. Exit of valve should be capped or plugged in addition to being closed for added safety.
Aftermarket/fabricated fuel tank or cell permitted. Must be located in trunk area. If tank or fuel filler is inside trunk, a bulkhead of minimum .032” aluminum or .024” steel must be used between trunk and driver compartment, and tank must be vented to outside of car. When used, fuel cells must have a metal box protecting the part of the fuel cell that is outside the trunk floor. Non-metallic fuel cells or tanks must be grounded to frame. See NHRA General Regulations Section 1.5.
1.6 GASOLINE
GASOLINE: Gasoline as outlined here is the only acceptable fuel for use in this eliminator for the specified combinations (See Section 13). The NMRA Racing Association reserves the right to check gasoline at any time during competition. Gasoline, as defined by the NHRA rulebook, is a mixture of hydrocarbons only. The average dielectric constant (D.C.) for the hydrocarbons that compromises gasoline is 2.025. This is defined as a reading of “0” on the fuel-check meter.
1.6a) SPEC FUEL: NMRA requires the use of one of the allowable NMRA spec fuels in this class. Mixing of fuels prohibited. Failure to pass fuel check is grounds for disallowance of the run during qualifying and disqualification from the event during eliminations. Fuel must pass color, fuel meter, specific gravity, chemical testing, and/or any other check as required by NMRA Technical Department.
1.6b) Spec Fuel Accepted list:
Manufacturer Fuel type Color
Torco Racing Fuels Mach 100 Unleaded Red
VP Racing Fuels C-10 Colorless
1.9 NITROUS OXIDE
NITROUS OXIDE: Prohibited.
1.10 OIL SYSTEM
OILING SYSTEM: Wet sump oiling system required. Dry sump oiling systems prohibited. External oil pumps prohibited. Oil lines run outside engine block to feed oil galleries prohibited. Vacuum pump and/or evacuator system (header, or otherwise) prohibited. Any oil pan permitted.
1.12 SUPERCHARGER
SUPERCHARGERS: Prohibited.
1.15 BLOCK
Block: Any cast iron Ford type 302W permitted. Any cast iron or cast aluminum 4.6 based engine block permitted. Block must maintain Ford O.E.M. bore spacing, deck heights, and crankshaft spacing for engine type used. Deck spacers (extensions) prohibited.
1.16 ENGINE LOCATION/MOUNTS
Engine Location: Engine location may be altered from stock, however no part of engine or heads may contact firewall. Engine plates prohibited. Solid engine mounts permitted.
1.17 HEADS
GENERAL GUIDELINES:
302W Type Heads: Only commercially available cast aluminum or cast iron, two-valve per cylinder heads permitted. Billet, one-off, custom and/or fabricated heads prohibited. Cylinder heads must be overhead valve single spark plug per cylinder design.
4.6 type Heads: Only commercially available cast aluminum or cast iron, cylinder heads permitted. Billet, one-off, custom and/or fabricated heads prohibited. Cylinder head must be single spark plug per cylinder design.
1.17a) HEADS, PERMITTED: Only original manufacture, generally available heads, accepted by NMRA, permitted. External modifications prohibited in port area. Spark plug placement and depth must remain stock. Billet, one-off, custom and/or fabricated heads prohibited.
1.17b) HEADS, MASS PRODUCED: Only mass produced, commercially available, NMRA accepted, cast aluminum or cast iron Ford cylinder heads permitted. Low volume, one off, aluminum cylinder heads prohibited.
1.17c) HEADS, BOLT PATTERN: Class is permitted standard bolt-pattern only for cylinder heads.
Maximum of 10 head fasteners per side in Ford O.E.M. location.
1.17d) HEADS, PORTING: Permitted.
1.17e) HEADS, WELDING/EPOXY: Prohibited.
1.17f) HEADS, VALVES: Maximum valve sizes for 302W heads is 2.025-inch Intake/ 1.605-inch Exhaust. Maximum valve sizes for 4.6L two valve heads are 1.850-inch Intake/ 1.452-inch Exhaust. Maximum valve sizes for 4.6L three-valve heads are 1.368-inch intake and 1.514-inch exhaust. Maximum valve sizes for 4.6L four valve heads are 1.487-inch Intake/ 1.211-inch Exhaust. Valve stem size in guide area must be 11/32-inch for 302W heads, Valve stem size in guide area must be 0.274-inch for 4.6L heads. Undercut stems permitted. Aftermarket steel valve permitted, titanium/exotic valves prohibited. Bronze lined or replacement guides permitted.
1.17g) HEADS, MILLING: Permitted. See combustion chamber volume. Cylinder heads must maintain original production valve angles + or – 2 degrees.
1.17h) HEADS, PUSHROD SLEEVES: Prohibited.
1.17i) HEADS, COMBUSTION CHAMBER VOLUME: The following cylinder heads are not restricted on combustion chamber volume: Ford O.E.M. cast iron 289, 302, 351, FRPP GT-40, & GT-40P heads. Minimum combustion chamber volume for all other 302W heads is 58.0 cc’s. Minimum combustion chamber volume for 2V/3V/4V 4.6L heads is 42.0 cc’s.
1.17j) HEADS, PORT PLATES/ADAPTER PLATES: Intake port plates prohibited, exhaust port plates maximum thickness .500-inch permitted.
1.17k) VALVE JOB: Any valve job permitted.
1.17l) Permitted Cylinder Head List, Parts Number: These are the only permitted cylinder heads and part numbers for competition in this category. If your cylinder head is not on this list, it is prohibited.
§ Stock Ford OEM 289/302/5.0 and 4.6L Cylinder Heads.
§ Ford GT-40 and GT-40P Cast Iron Cylinder Heads
§ FRPP GT-40 Aluminum Cylinder Heads, PN# M 6049 X303 & Y303
§ FRPP/SVO 4.6 2V Cylinder Heads
§ FRPP/SVO 4.6L 4-Valve Cylinder Head, M 6049 T46
§ Edelbrock Performer & Performer RPM Heads, PN# 60329, 60359, 60279, 60229, 60259, 60269
§ Trick Flow Twisted Wedge Aluminum Standard Version (Non-R) Cylinder Heads **
§ Brodix ST 5.0 & 5.0R Aluminum Cylinder Heads, PN# ST 5.0 & ST 5.0R
§ Holley 5.0 Aluminum Cylinder Heads, PN# 300-573, 574, 575, 576, 577, 578, 579
§ World Products Roush 180 & Windsor Jr, PN# 53030, 23030
§ Air Flow Research 165, PN# 1398, 1399, 1400, 1402, 1472
§ Dart Pro 1 170cc As-Cast Cylinder Heads, PN#13100080, 13111181, 13111182
§ Canfield 170cc Street #18-350
§ RHS 180cc (Iron & Alum)
** These heads require a 50lb weight adder to base weight
Note: Stock factory OEM heads are those cylinder heads that are factory production line installed on production vehicles as recognized by NHRA.
1.18 VALVETRAIN
1.18a) CAMSHAFT: Maximum lift at valve for engine applications is as follows:
5.0 Engines - .500” maximum lift
4.6 2V engines - .550” maximum lift
4.6 3V engines – .480” maximum lift
4.6 4V engines - .480” maximum lift
1.18b) LIFTERS: Functional, unmodified Ford OEM stock hydraulic roller lifters required.
Any modification to the clip, pushrod cup, piston, spring, or lifter body is not permitted. Hydraulic roller lifters may not be plugged or bottomed.
1.18c) LIFTER BORES: Bushed lifter bores permitted.
1.18d) VALVE LOCK: Any permitted.
1.18e) RETAINERS: Any permitted.
1.18f) STUD & GUIDE PLATES: Stud and guide plate conversions permitted.
1.18g) CAMSHAFT DRIVE SYSTEM: Stock type camshaft drive system required.
1.18h) ROCKER ARMS: Any permitted.
1.18i) REV KITS: Prohibited.
1.18j) PUSHRODS: Steel is only accepted material. Composite pushrods prohibited.
1.19 CARBURETORS
CARBURETORS: Limited to one automotive type carburetor. Split carburetor prohibited. Carburetor restricted to a maximum throttle bore size – 1.712-inch, maximum venturi size – 1.280-inch. Standard-style boosters are required (no aerosol, annular, etc).
1.19a) CARBURETOR MODIFICATIONS: Any permitted.
1.19b) AIR CLEANER: Commercially available, mass produced, unmodified, automotive type air cleaner required. All incoming air must pass through air cleaner.
1.20 FUEL INJECTION
Fuel Injection: OEM Ford EEC-IV or EEC-V engine control computer system required. NMRA accepted “plug-in” chips and EEC computer “add-ons” permitted. Ford EEC-IV or Ford EEC-V Speed density permitted for all combinations. OEM engine control computer must be functional.
1.20a) THROTTLE BODY: Only mass produced, commercially available throttle bodies permitted. Single throttle body in stock location required. Maximum throttle body size is 2.952” (75mm) for 5.0 & 4.6 2V applications. 4.6 4V may use aftermarket, commercially available, bolt-on throttle body. EGR spacer is not required.
1.20b) MASS AIR SIZE & TYPE PERMITTED: Commercially available, complete, mass produced mass air sensors required on all combinations (sample tube and elements required), including speed density equipped. Mass air sensor is not required to function. Mass air sensor must be standard draw through design. Maximum size of mass air sensor – 3.150-inch (80mm).
1.20c) FUEL INJECTOR SIZES & TYPES: Any size/type fuel injector permitted. Maximum of 8 fuel injectors located in stock location.
1.20d) AIR CLEANER: Commercially available, mass produced, unmodified, automotive type air cleaner required. All incoming air must pass through air cleaner.
1.20e) EFI ADD-ONS:
If your add-on computer is not on this list, it is prohibited.
1) FRPP Extender & FRPP EPEC
2) Anderson Ford PMS
3) Autologic Plug-in EEC Chip
4) Superchips Plug-in EEC Chip
5) Hyperchip Plug-in EEC Chip
6) Diablo Plug-in EEC Chip
7) EEC Tuner
8) SCT Xcalibrator & XCAL2
9) Diablo Predator
1.21 INTAKE MANIFOLD
INTAKE MANIFOLD: Only NMRA accepted, commercially available, mass-produced intake manifolds permitted
Any height spacer permitted between EFI upper and lower intakes only. All runners must be completely separated from each other runner. Spacer or gasket must not create a 'plenum', or any other means for air to pass between runners. Carb spacers permitted. Maximum 1.200-inch total thickness, including sandwiched gaskets. Maximum of one gasket (max. thickness 0.125-inch) between any mating surface. 4.6L 4V & 3V combinations may remove secondary runner controls. Only 4.6L 2V engines may use aftermarket as-cast throttle-body to intake manifold plenums.
1.21a) PORTING: Permitted for EFI upper & lower intake manifolds. Upper EFI manifold may be ported, but may not be cut, modified or welded. Runners may not be shortened. Carbureted intakes may be ported only 1” into runners (from intake mounting face), otherwise, porting/machining is prohibited on carbureted intakes.
1.21b) WELDING/EPOXY: Prohibited.
1.21c) PERMITTED INTAKE MANIFOLD LIST, PART NUMBERS: These are the only permitted intakes and part numbers for competition in this category. If your part number is not on this list consider it prohibited.
§ OEM Ford 5.0, & 4.6 Intakes – Upper & Lower
§ FRPP GT-40 Upper & Lower, PN# M 6001 A50
§ Edelbrock Performer – Upper & Lower, PN# 3821
§ Edelbrock Performer RPM – Upper & Lower, PN# 7126
§ Edelbrock Perfomer RPM II – Upper & Lower, PN #7123
§ Trick Flow Street Heat – Upper & Lower, PN# 51500001
§ Trick Flow Track Heat – Upper & Lower, PN# 51500002
§ FRPP 4.6 2V Hi-Flow Intake – Package, PN# M 9424 E46
§ Holley SysteMax – Upper & Lower, PN# 300-72
§ Saleen/Vortech – Upper & Lower
§ Edelbrock Performer** (carb only) – PN# 3721
§ Edelbrock Performer RPM** (carb only) – PN# 7521, 7121
§ Edelbrock Performer RPM Air Gap** (carb only)
§ Weiand Stealth** (carb only) – PN# 8011, 8311, 8020
§ Ford M-9424-T46
Reichard Racing 4.6L 2V Sheet metal Intake Manifold * for EFI / 4.6L 2V Use Only
Fox Lake Power Products P51 Intake Manifold * for EFI / 4.6L 2V Only
BBK Intake Manifold PN #5001
** These intakes may only be ported 1” into the intake manifold ports on the cylinder head side (from intake mounting surface). Porting/machining anywhere else is prohibited.
1.22 SOLENOIDS
SOLENOIDS: Prohibited.
1.23 TURBOCHARGERS
TURBOCHARGER: Prohibited.
1.24 AFTERCOOLER/INTERCOOLER
AFTERCOOLER/INTERCOOLER: Prohibited.
1.25 POWER ADDERS
POWER ADDERS: Prohibited.
Water injection is prohibited.
1.26 CRANKSHAFT
CRANKSHAFT: Stock or aftermarket cast iron or steel crankshaft required. Composite and/or multi-piece crankshafts prohibited. Stock 3.0-inch stroke, +/- .010-inch, mandatory for 302W applications. Stock 3.543-inch stroke, +/- .010-inch, mandatory for 4.6L 2V/3V/4V applications. Minimum rod bearing shaft diameter is 2.000-inch. Modifications to crankshaft permitted.
1.27 CONNECTING RODS
CONNECTING RODS: Stock or aftermarket steel connecting rods required. Composite connecting rods prohibited. 302W connecting rods must be 5.09-inch, +/- .025-inch, center to center length. 4.6L connecting rods must be 5.933-inch, +/- .025”, center to center length. Connecting rods may be of any design. Connecting rods may be free floating or press fit.
1.28 HEAD GASKETS & QUENCH AREA
HEAD GASKETS & QUENCH AREA: Pistons may be below block, even with deck, or above block at top dead center. Any type single head gasket permitted.
1.29 PISTONS, PINS, RINGS
PISTONS, PINS, RINGS: Stock or aftermarket piston permitted. Pistons for 5.0L, 4.6 3-valve & 4-valve must be flat top or dish design. Pistons for 4.6L 2-valve head combinations may be dome-type design. The use of 3 rings required. Gas porting any portion of piston assembly prohibited (side, top, or otherwise).Wrist pins for 302W based applications must be a minimum of .912-inch diameter. Wrist pins for 4.6L applications must be a minimum of .866-inch diameter. Valve reliefs optional.
1.30 BOOST CONTROLLERS
BOOST CONTROLLERS: Prohibited.
1.31 WASTEGATE & PRESSURE REGULATOR
WASTEGATE & PRESSURE REGULATOR: Prohibited.
1.32 VISIBLE COATINGS
Visible coatings are permitted where lubricants are present. Visible piston coating above the top ring is permitted. Visible coating of cylinder head runners, combustions chambers, and/or intake manifold runners/plenums prohibited. Visible coating of any external surface of cylinder head or intake manifold prohibited, including, but not limited to runners and/or plenums.
1.33 “O” Ringing of block
“O” RINGING OF BLOCK: Permitted.
2: Drivetrain
2.3 CLUTCH
CLUTCH: Standard Ford OEM factory-replacement-style single disc diaphragm clutch required. Steel or aluminum pressure plate a minimum of 10.0-inch in diameter is required. Adjustable and/or long-style pressure plates are prohibited. Clutch operation must be operated using factory style cable mechanism. 2005-up Mustangs using hydraulic clutch actuation may retro-fit ’79-’04 cable style mechanism.
2.4 DRIVESHAFT
DRIVESHAFT: Driveshaft required to be only steel or only alumium regardless of origin or manufacturer.
2.11 REAREND
REAREND: Any automotive type rearend permitted.
2.12 MANUAL TRANSMISSIONS
MANUAL TRANSMISSION: Only specified O.E.M. or specified aftermarket transmissions permitted. Overdrive gear(s) may be removed. Clutchless models prohibited. Any gear change must occur from direct action by the driver. Pneumatic, electric, hydraulic, etc. shifters prohibited. Pro-shifting is permitted. All transmissions must use either a) as produced, as supplied (unmodified) OEM gears and/or gear sets for transmission used or b) specified stock replacement helical cut gears and/or gear sets in the exact form as submitted for consideration and accepted by the NMRA. Gears and/or gear sets may not be utilized from other models (i.e. T-56 gears may not be used in T-5 transmissions). Transmission used is required to have a gear ratio in all gears as offered by the transmission used. Welding or grafting part of one countershaft to part of another counter shaft is prohibited.
2.12a) PERMITTED MANUAL TRANSMISSIONS:
Tremec T5, Tremec T45, Tremec T56, Tremec TR3550, Tremec TR3650, Tremec TKO, Tremec TKO-500, TKO-600, & Tremec TKOII.
2.12b): SHIFTER: Must be commercially available bolt on shifter. Must have a single handle and attach to the transmission using only a) the OEM type mounting bolts in the OEM mounting holes and b) must use a single pivot-ball type shifting arm.
2.12c) PERMITTED GEAR RATIOS:
Tremec T5(a) - 3.35, 1.99, 1.33, 1.00
Tremec T5(b) - 2.95, 1.94, 1.34, 1.00
Tremec T45 - 3.37, 1.99, 1.33, 1.00
Tremec T56(a) - 2.66, 1.78, 1.30, 1.00
Tremec T56 (b) - 2.97, 2.07, 1.43, 1.00
Tremec TR3550 - 3.27, 1.98, 1.34, 1.00
Tremec TR3650 - 3.38, 2.00, 1.32, 1.00
Tremec TKO/TKOII - 3.27, 1.98, 1.34, 1.00
T5 w/G-Force PN#5000 Dog Ring - 2.92, 1.99, 1.34, 1.00
T5 w/G-Force PN#5000 Syncro - 2.94, 1.94, 1.34, 1.00
Tremec TR3550/TKO/TKOII w/Liberty Gear PN#LG3500 - 2.92, 1.95, 1.34, 1.00
Tremec TKO-500 - 3.27, 1.97, 1.34, 1.00
Tremec TKO-600 - 2.87, 1.89, 1.28, 1.00
T5 w/G-Force PN#5000 Dog Ring – 3.22, 1.99, 1.34, 1.00
2.12b): SHIFTER: Must be commercially available bolt on shifter. Must have a single handle and attach to the transmission using only a) the OEM type mounting bolts in the OEM mounting holes and b) must use a single pivot-ball type shifting arm.
2.13 PURPOSE BUILT TRANSMISSIONS
PURPOSE BUILT TRANSMISSIONS: Prohibited.
2.14 AUTOMATIC TRANSMISSIONS
(OEM American transmissions or replicas of OEM American transmissions that use planetary gears)
AUTOMATIC TRANSMISSIONS: Ford AOD, AOD-E, 5R55S, & 4R70W transmissions with torque converter are required. Transbrake permitted. Overdrive gear may be removed. Pneumatic, electric, hydraulic, etc. shifters prohibited.
3: BRAKES & SUSPENSION
3.1 BRAKES
BRAKES: All cars must have front and rear hydraulic brakes. Automated brakes or any type of traction control is prohibited. Application and release of brakes must be a function of the driver’s foot. Line loc permitted on front wheels only. Any other electric, pneumatic, or hydraulic device in the system is prohibited.
3.2 SHOCK ABSORBERS
shock absorbers: each vehicle in competition must be equipped with one operative shock absorber for each sprung wheel. Shock absorbers may be either hydraulic or friction type, securely mounted and in good working order.
3.3 STEERING
STEERING: Power assisted or manual aftermarket steering system in stock location mandatory.
3.4 Suspension, FRONT
FRONT SUSPENSION:
3.4a) K-MEMBERS: Aftermarket K-Members permitted, but must attach to the chassis using only the original eight (8) factory O.E.M. type mounting bolts in the factory mounting location. No part of the K-member may be permanently attached to the chassis. K-member may be modified in oil pan area to allow oil pan enlargement or removal.
3.4b) STRUT TOWER: Factory strut tower required. No modifications may be made to the strut towers other than the roll bar or roll cage may be welded to the strut towers for safety purposes.
3.4c) CONTROL ARMS: Aftermarket tubular control arms permitted that are attached in stock locations.
3.4d) SHOCKS/STRUTS: Aftermarket struts and shocks permitted provided stock attachment locations are used.
3.4e) SPRINGS: Aftermarket springs permitted.
3.4f) COIL OVERS: Coil over shocks and struts permitted. OEM mounting location required.
3.4g) CAMBER PLATES: Bolt on type camber plates permitted. Bolt on plate may be tack welded to strut tower to prevent movement (2.00-inch max length), otherwise welding prohibited. Camber plate may only be attached to top flat portion of strut tower. Attachment to any other structure prohibited.
3.4h) SPINDLES: Only stock OEM or NMRA accepted, bolt-on, commercially available aftermarket spindles permitted. NMRA accepted spindles are Anthony Jones Engineering, RaceCraft, Strange, & Santhuff.
3.4 SUSPENSION, REAR
REAR SUSPENSION: Stock type suspension, including stock 4-link, and traction bars permitted. Rear coil-over shocks prohibited.
Stock Type Suspension: Stock type suspension may utilize aftermarket, direct replacement type suspension components including aftermarket replacement shocks, springs (in factory location), and/or control arms. All stock type 4-link suspensions must maintain stock lateral angles and attachment points, but may be moved up or down on rear axle. Aftermarket torque arms permitted.
3.4a) 3-LINK and 4-LINK: Stock or stock-type direct-replacement 3-link and/or 4 links required. All stock type 3 or 4 link suspensions must maintain stock lateral angles and attachment points, but may be moved up or down on rear axle. Retrofitting and/or cross-breeding of 3-link and 4-link components prohibited.
3.4b) LADDER BARS: Prohibited.
3.4c) REPLACEMENT CONTROL ARMS: Replacement aftermarket O.E.M. style upper and lower control arms permitted. Control arms may use any type bushing, bearing, or rod end. Control arms may be adjustable to any length.
3.4d) PANHARD BARS: Panhard bars permitted to control lateral movement of rearend housing. Panhard bars must be located aft of rearend housing, and control only lateral rearend movement. Panhard bars may be welded.
3.4e) SWAY BARS: Aftermarket or factory sway bars permitted. Aftermarket sway bars may be welded to both chassis and rearend housing.
3.4f) TORQUE ARMS: Permitted.
3.4g) REAR SHOCKS & SPRINGS: O.E.M. or aftermarket style shocks & springs required in stock location. Coil-over springs prohibited. Shocks must be stand alone and may not be adjustable during run via any means.
3.4h) TRACTION BARS: Bolt on traction bars with permanent (welded or bolted) rear end mount and rubber snubber (or rubber bushing with permanent mount) on chassis side permitted.
3.4i) TORQUE BOXES: The Wild Rides “S” Box has been deemed an acceptable OEM Fox-body torque box replacement when installed in the OEM location as per Wild Rides official instructions. The only acceptable control arm mounting location for the upper control arms is the middle hole on the “S” box, which is the same as the stock OEM mounting location.
3.6 WHEELIE BARS
WHEELIE BARS: Prohibited.
4:FRAME
4.4 FRAME
FRAME: Stock, unaltered frame rails required in front and rear subframes. Subframes may be joined under car. Maximum size material to be used; 2x3x1/8 inch rectangular tubing or 1 5/8 O.D. inch round tubing (.118MS or .083CM). If connector protrudes through floor, floor must be completely welded to connector.
4.5 GROUND CLEARANCE
GROUND CLEARANCE: Minimum 3 inches from front of vehicle to 12 inches behind centerline of front axle; 2 inches for remainder of vehicle, except oil pan and exhaust headers.
4.12 WHEELBASE
WHEELBASE: Entries must retain stock wheelbase + or - 1 inches of stock. Maximum variation from left to right and front to back is 1 inch.
5: tires & wheels
5.1 Tires
TIRES - FRONT: Front tires must have a minimum tread width of 4.5 inches.
TIRES – REAR: Street type or racing slicks permitted. Maximum actual measured tire size is as follows: Actual measured tread of tire is limited to 10.6 inches by 26.5 inches tall. Tire width will be measured by a “go-no go” gauge after conclusion of run at scale area. Tire tread may not extend outside fenders. Tire shaving is prohibited.
5.2 WHEELS
WHEELS: Spindle-mount front wheels prohibited.
6: INTERIOR
6.1 INTERIOR
Interior, GENERAL: Must maintain stock appearance; including factory OEM dashboard, headliner, & steering column cover. Heater/air conditioners may be removed.
6.4 CARPET
CARPET: Floor and tunnel where visible must be upholstered or carpeted. Headliner required.
6.5 SEATS
SEATS: Upholstered OEM or aftermarket upholstered seats (2) in stock location is required. Rear seat may be removed; area must be carpeted or upholstered.
6.6 DOOR PANELS
DOOR PANELS: Door panels must be covered and stock appearing.
6.7 STEERING COLUMN
STEERING COLUMN: Stock O.E.M. steering column required. Removable steering wheel permitted.
6.8 GAUGES
GUAGES: Aftermarket gauges may be installed in factory dash.
6.9 PEDALS/PEDAL LOCATION
PEDALS/PEDAL LOCATION: Stock type pedals, linkage, and location required.
7: Body
BODY: Vehicle must retain original or NMRA accepted appearances and profiles for year and make of body. Original O.E.M. body shell (unibody structure from firewall to taillight panel must be intact). Only 1979 & newer Foxed based and 2005 to present Mustang Ford body styles permitted. Lightweight body parts restricted to hood. Hood must be hinged or lift off. Deck lid must be hinged, lift off deck lids prohibited.Body must be finished and painted. Alterations or aerodynamic modifications such as “chopped tops”, “channeling”, “sectioning”, “shortening” or “scaling down” prohibited.If a convertible top is used as an entry the use of ANY mechanism under or above the convertible top is not permitted. Ex: Building a cover that would be located above or below the convertible top, using straps below or above the convertible top, etc. Convertible top must be operational. Convertible entries must compete with top up.
7.1 ADVERTIsING
GRAPHICS: Graphics (for advertising or creative purposes) permitted on entire body, including doors, hood, rear quarter panels, front fenders, wing, etc.
CONTINGENCY DECALS: In order to be eligible for NMRA official contingency program, all contingency decals are required to appear only on the rear quarter windows or rear window in a clear and organized fashion. Contingency decals may not be overlapped or modified. Other decals and sponsorship (non-contingency) may appear on bodywork, front end, and on windows.
NMRA REQUIRED DECALS: The following decals are required for competition in NMRA events.
NMRA Windshield Decal – must be installed on top of windshield. This NMRA decal must be the only decal on top of windshield. Other vehicle sponsor decals may be placed at base of windshield.
NMRA 2007 Drag Racing Series “Side” Decals – must be installed on each side of vehicle on quarter windows.
Class Sponsor Decal – class sponsor decal must be installed on base of windshield on the passenger side.
Permanent Numbers – permanent numbers are required for competition in this class. Must be on front, rear, and both side windows.
7.2 SPOILERS
Rear SPOILER: Rear spoilers permitted, may not extend more than 26 inches from the transition point with the body to the rear most portions. Rear spoiler may not be molded into body (Pro Mod Style).
Spoilers must be stationary during entire run. A positive locking device to prevent movement required. Spring loaded spoilers prohibited. Spoiler spill plates (if used) may be a maximum of 12” in height.
7.5 FIREWALLS
Firewall: Stock, unaltered firewall required.
7.6 FLOOR/TRUNK PAN/TRANSMISSION TUNNEL
FLOOR: Stock, unaltered floor-pan, except for through the floor sub frame connectors, required from firewall to back bumper. Transmission tunnel must remain stock & unaltered. Removable floor-pan sections and/or transmission tunnels prohibited. Only spare tire well may be removed/replaced , all other rear floor pan and trunk pan must be intact.
7.7 HOOD/SCOOP
Hood/Scoop: OEM or aftermarket hood permitted. Forward mounted hood scoops must be closed during competition. Cowl induction hoods restricted to a maximum of 5 inches as measured from the hood surface next to the scoop to the top of the scoop along the entire scoop. The entire induction system must be completely covered by hood. Hood must be attached separately in a conventional manner and must be lift off or bolt on.
7.9 WINDSHIELDS/WINDOWS
Windows: O.E.M. safety glass required. Driver and passenger windows must be closed during racing. Windows must be operative. NHRA-approved Lexan may be used to replace OEM sunroof glass and OEM T-Top glass, when installed in an NHRA-approved manner.
7.10 BUMPERS
Bumpers: not Applicable. License plate frame holders are not permitted to extend beyond flat surface of front bumper. No body components, bumper add-ons, or body kits are permitted to be added to the vehicle with the intent of increasing the frontal distance of the bumper for the purposes of breaking the infrared beams.
7.11 FENDER SPLASH PANS
Fender Splash Pans: Full, factory OEM sheet metal inner fenders required.
7.12 GRILLE
GRILLE: Stock grille required. Blocking of grille to prevent air passage is prohibited.
7.13 WHEELWELLS
INNER WHEELWELLS: Stock inner wheel wells required, may not be sectioned or replaced.
OUTER FENDERS: Leading and trailing edges of outer fenders may be trimmed for tire clearance, maximum 2”.
7.14 RAM AIR/ENGINE AIR PANS
Ram Air: Only commercially available ram-air/cold-air kits permitted. Headlights/taillights/hazard lights may not be removed/modified for air induction. Final acceptance is with the discretion of NMRA Technical Department
Carbureted applications may only get induction air from rear of hood/cowl area or under hood.
7.15 DOORS
Doors: Driver and passenger doors must be functional and operable from inside and outside of vehicle.
7.16 AERODYNAMICS
AERODYNAMICS: Taping of any body parts, seams, or front end prohibited. Removal of side mirrors prohibited. Head light covers permitted. Fog light covers permitted.
7.17 BODY KITS
BODY KITS: Only accepted, commercially available aftermarket body kits permitted. Filled-in lower valance prohibited, whether OEM or commercially available aftermarket. Blocking any portion of lower valance area (in front of behind valance) with Plexiglas or other materials prohibited.
7.18 COWL AREA
COWL AREA: Cowl area of vehicle must be unaltered.
7.19 FRONT FENDERS/FRONT FASCIA
FRONT FENDERS/FRONT FASCIA: Stock or stock replacement front fenders and front fascia required. Filled-in lower valance, whether OEM-modified or as-supplied aftermarket valance, prohibited. May not be one-piece front end. Hole(s) in front bumper prohibited.
8: Electrical
8.1 BATTERY/CHARGING SYSTEM
BATTERY: Battery may be relocated. Charging systems must be functional and crank driven by the factory style 6 rib serpentine belt.
8.3 Ignition
IGNITION: Any battery operated ignition permitted. Any distributor drive system permitted.
8.5 STARTER
STARTER: All entries must be self-starting with on-board starter.
9: SUPPORT GROUPS
Bracket racing aids such as optical sensors, delay boxes, stutter boxes, etc. prohibited. Throttle stops prohibited. The application or use of any device, mechanical or electronic, that permits the driver to ascertain the position of their vehicle in relation to the starting line is prohibited.
9.2 OnBoard Diagnostics/Data Recorders
ONBOARD DIAGNOSTICS/DATA RECORDERS: External data recorders & data loggers are prohibited.
Stand-alone wide band oxygen sensors and recorders permitted, however device may not be capable of data logging additional sensors and/or analog inputs, with the sole exception of tachometer signals
Any wide-band 02 device must be capable of only logging air/fuel ratio, and may not be run in closed loop with EFI or ignition system. Only a single 02 sensor is permitted to be installed in header collector only. EFI systems if standard equipped are permitted to record engine functions only of the vehicle. Playback tachometers permitted including those that record driveshaft RPM. Any wiring monitoring engine or drive train functions other than those specifically permitted are prohibited. Laptops prohibited in vehicle during competition.
9.8 TOW VEHICLES
TOW VEHICLES: Vehicles may not be towed in or to staging lanes, violation will result in disqualification of run. Vehicles may not be towed from the return road. Vehicle may be towed from scales.
10: DRIVER
10.4 CREDENTIALS
CREDENTIALS: See general regulations.
11: CLASS & SAFETY REQUIREMENTS
It is the participant’s responsibility to familiarize oneself with the class requirements as found in the 2007 NMRA rulebook and the safety requirements as found in the 2007 NHRA rulebook.
The participant agrees that the participant bears the ultimate responsibility at all times to ensure the safety of participant’s vehicle and to ensure that participant complies with all applicable NHRA & NMRA rules. The participant agrees that participant is in the best position to know about the construction and operation of participant’s vehicle, equipment, and clothing, and whether there has been compliance with all applicable NHRA & NMRA rules.
12: Street-Legal Requirements
Headlights and tail lights for year & make of body used mandatory. Head lights & tail lights required to be functional.
RULES ADJUSTMENTS, MID SEASON LOG
Date: Adjustment:
None at this time.
NMRA SERIES 2007 RULES
Preliminary Version 1.1
Class Overview
Pure Street is designed for naturally aspirated small block 1979 and newer Ford Fox Chassis and 2005 to present Mustang bodied and Ford powered vehicles. Pure Street entries are limited to 302, and 2V/3V/4V 4.6L modular engine types. 5.0L engines are permitted a maximum of 313 cubic inches. 4.6L engines are permitted a maximum of 291 cubic inches. Pure Street class will be held at all NMRA events during the 2006season.
Qualifying Information, Ladder Type, & Tree
All Run, NHRA Sportsman Ladder, Pro .400 tree, Heads-Up.
Accepted Products Deadline: NMRA will accept requests from manufacturers to have new products considered for addition to 2007 accepted lists only up until January 1, 2007. After this date, NMRA will consider manufacturer requests for new products for the 2008 season.
Base Weights:
ENGINE POWER ADDER BASE CI BASE WEIGHT
5.0L None 311 3100
4.6 2V None 289 2700
4.6 3V None 289 2900
4.6 4V None 289 3000
Maximum Cubic Inch – 313 ci
AOD combinations may deduct 50-lbs.
Carburetor applications – add 75-lbs to base weight. See section 1.19
TFS Twisted Wedge cylinder heads – add 50# to base weight. See section 1.17
Note: 15 lbs/cu in penalty applies for cubic inches over base weight break.
Note: All weights are with driver at conclusion of run at scale area.
Class Rules, PURE STREET
1.1 COOLING SYSTEM
RADIATOR: OEM production-style or aftermarket radiator is required and must be mounted in stock location. Stock core support is required.
Water pump: Any aftermarket (belt drive or electric drive) pump permitted.
COOLING FANS: Any permitted.
1.2 Engine
ENGINE: Engine limited to 302W (5.0) and 4.6L modular engine types. 302 Windsor type engines and 4.6L engines may be used in any 1979 and newer Fox based chassis. Engine swapping permitted during event.
1.2a) ENGINE DRIVE BELT SYSTEM: Factory style 6 rib drive belt system required. 6-rib belt required. Minimum crankshaft pulley diameter – 3-inch.
1.3 Exhaust
EXHAUST: All entries allowed to use tubular headers. Adapter plates to bolt headers to cylinder head permitted, maximum thickness .500-inch. Exhaust must be directed out of car body, away from driver and fuel tank. All exhaust gases released from engine must pass through entire exhaust system.
1.3a) HEADERS & COLLECTORS: All entries allowed to use tubular headers, maximum tubing size 1.75”.
1.3b) EXHAUST TUBING/SIZE: Maximum exhaust pipe diameter – 2.5-inch up to gas tank, 3-inch from gas tank rearward (tailpipe).
1.3c) TAILPIPE & EXHAUST RULES: Full exhaust system required. Tailpipes must exit within 12-inch of rearend centerline housing.
1.3d) MUFFLER REQUIREMENTS: Commercially available (generally available through retail locations) mufflers required.
A maximum of two (2) mufflers is allowed. A maximum of one (1) inlet and one (1) outlet is permitted. Mufflers may have a maximum of 2.5-inch inlet & outlet.
1.5 FUEL-DELIVERY SYSTEM
DELIVERY SYSTEM: Electric or mechanical fuel pumps permitted. Pressure regulators, and any line size permitted. All fuel lines must originate and return to a single, non-segmented, fuel cell or OEM fuel tank. Fuel pump must shut off with a master electrical switch. Any method of artificially heating or cooling fuel prohibited (cool cans, ice, wet rags, Freon, etc.). A valve for removal of fuel (gasoline) during technical inspections is mandatory. Valve must be installed between carburetor/injection and regulator, and should be installed in such a manner that allows a cup to be placed to catch fuel removed from the line. Exit of valve should be capped or plugged in addition to being closed for added safety.
Aftermarket/fabricated fuel tank or cell permitted. Must be located in trunk area. If tank or fuel filler is inside trunk, a bulkhead of minimum .032” aluminum or .024” steel must be used between trunk and driver compartment, and tank must be vented to outside of car. When used, fuel cells must have a metal box protecting the part of the fuel cell that is outside the trunk floor. Non-metallic fuel cells or tanks must be grounded to frame. See NHRA General Regulations Section 1.5.
1.6 GASOLINE
GASOLINE: Gasoline as outlined here is the only acceptable fuel for use in this eliminator for the specified combinations (See Section 13). The NMRA Racing Association reserves the right to check gasoline at any time during competition. Gasoline, as defined by the NHRA rulebook, is a mixture of hydrocarbons only. The average dielectric constant (D.C.) for the hydrocarbons that compromises gasoline is 2.025. This is defined as a reading of “0” on the fuel-check meter.
1.6a) SPEC FUEL: NMRA requires the use of one of the allowable NMRA spec fuels in this class. Mixing of fuels prohibited. Failure to pass fuel check is grounds for disallowance of the run during qualifying and disqualification from the event during eliminations. Fuel must pass color, fuel meter, specific gravity, chemical testing, and/or any other check as required by NMRA Technical Department.
1.6b) Spec Fuel Accepted list:
Manufacturer Fuel type Color
Torco Racing Fuels Mach 100 Unleaded Red
VP Racing Fuels C-10 Colorless
1.9 NITROUS OXIDE
NITROUS OXIDE: Prohibited.
1.10 OIL SYSTEM
OILING SYSTEM: Wet sump oiling system required. Dry sump oiling systems prohibited. External oil pumps prohibited. Oil lines run outside engine block to feed oil galleries prohibited. Vacuum pump and/or evacuator system (header, or otherwise) prohibited. Any oil pan permitted.
1.12 SUPERCHARGER
SUPERCHARGERS: Prohibited.
1.15 BLOCK
Block: Any cast iron Ford type 302W permitted. Any cast iron or cast aluminum 4.6 based engine block permitted. Block must maintain Ford O.E.M. bore spacing, deck heights, and crankshaft spacing for engine type used. Deck spacers (extensions) prohibited.
1.16 ENGINE LOCATION/MOUNTS
Engine Location: Engine location may be altered from stock, however no part of engine or heads may contact firewall. Engine plates prohibited. Solid engine mounts permitted.
1.17 HEADS
GENERAL GUIDELINES:
302W Type Heads: Only commercially available cast aluminum or cast iron, two-valve per cylinder heads permitted. Billet, one-off, custom and/or fabricated heads prohibited. Cylinder heads must be overhead valve single spark plug per cylinder design.
4.6 type Heads: Only commercially available cast aluminum or cast iron, cylinder heads permitted. Billet, one-off, custom and/or fabricated heads prohibited. Cylinder head must be single spark plug per cylinder design.
1.17a) HEADS, PERMITTED: Only original manufacture, generally available heads, accepted by NMRA, permitted. External modifications prohibited in port area. Spark plug placement and depth must remain stock. Billet, one-off, custom and/or fabricated heads prohibited.
1.17b) HEADS, MASS PRODUCED: Only mass produced, commercially available, NMRA accepted, cast aluminum or cast iron Ford cylinder heads permitted. Low volume, one off, aluminum cylinder heads prohibited.
1.17c) HEADS, BOLT PATTERN: Class is permitted standard bolt-pattern only for cylinder heads.
Maximum of 10 head fasteners per side in Ford O.E.M. location.
1.17d) HEADS, PORTING: Permitted.
1.17e) HEADS, WELDING/EPOXY: Prohibited.
1.17f) HEADS, VALVES: Maximum valve sizes for 302W heads is 2.025-inch Intake/ 1.605-inch Exhaust. Maximum valve sizes for 4.6L two valve heads are 1.850-inch Intake/ 1.452-inch Exhaust. Maximum valve sizes for 4.6L three-valve heads are 1.368-inch intake and 1.514-inch exhaust. Maximum valve sizes for 4.6L four valve heads are 1.487-inch Intake/ 1.211-inch Exhaust. Valve stem size in guide area must be 11/32-inch for 302W heads, Valve stem size in guide area must be 0.274-inch for 4.6L heads. Undercut stems permitted. Aftermarket steel valve permitted, titanium/exotic valves prohibited. Bronze lined or replacement guides permitted.
1.17g) HEADS, MILLING: Permitted. See combustion chamber volume. Cylinder heads must maintain original production valve angles + or – 2 degrees.
1.17h) HEADS, PUSHROD SLEEVES: Prohibited.
1.17i) HEADS, COMBUSTION CHAMBER VOLUME: The following cylinder heads are not restricted on combustion chamber volume: Ford O.E.M. cast iron 289, 302, 351, FRPP GT-40, & GT-40P heads. Minimum combustion chamber volume for all other 302W heads is 58.0 cc’s. Minimum combustion chamber volume for 2V/3V/4V 4.6L heads is 42.0 cc’s.
1.17j) HEADS, PORT PLATES/ADAPTER PLATES: Intake port plates prohibited, exhaust port plates maximum thickness .500-inch permitted.
1.17k) VALVE JOB: Any valve job permitted.
1.17l) Permitted Cylinder Head List, Parts Number: These are the only permitted cylinder heads and part numbers for competition in this category. If your cylinder head is not on this list, it is prohibited.
§ Stock Ford OEM 289/302/5.0 and 4.6L Cylinder Heads.
§ Ford GT-40 and GT-40P Cast Iron Cylinder Heads
§ FRPP GT-40 Aluminum Cylinder Heads, PN# M 6049 X303 & Y303
§ FRPP/SVO 4.6 2V Cylinder Heads
§ FRPP/SVO 4.6L 4-Valve Cylinder Head, M 6049 T46
§ Edelbrock Performer & Performer RPM Heads, PN# 60329, 60359, 60279, 60229, 60259, 60269
§ Trick Flow Twisted Wedge Aluminum Standard Version (Non-R) Cylinder Heads **
§ Brodix ST 5.0 & 5.0R Aluminum Cylinder Heads, PN# ST 5.0 & ST 5.0R
§ Holley 5.0 Aluminum Cylinder Heads, PN# 300-573, 574, 575, 576, 577, 578, 579
§ World Products Roush 180 & Windsor Jr, PN# 53030, 23030
§ Air Flow Research 165, PN# 1398, 1399, 1400, 1402, 1472
§ Dart Pro 1 170cc As-Cast Cylinder Heads, PN#13100080, 13111181, 13111182
§ Canfield 170cc Street #18-350
§ RHS 180cc (Iron & Alum)
** These heads require a 50lb weight adder to base weight
Note: Stock factory OEM heads are those cylinder heads that are factory production line installed on production vehicles as recognized by NHRA.
1.18 VALVETRAIN
1.18a) CAMSHAFT: Maximum lift at valve for engine applications is as follows:
5.0 Engines - .500” maximum lift
4.6 2V engines - .550” maximum lift
4.6 3V engines – .480” maximum lift
4.6 4V engines - .480” maximum lift
1.18b) LIFTERS: Functional, unmodified Ford OEM stock hydraulic roller lifters required.
Any modification to the clip, pushrod cup, piston, spring, or lifter body is not permitted. Hydraulic roller lifters may not be plugged or bottomed.
1.18c) LIFTER BORES: Bushed lifter bores permitted.
1.18d) VALVE LOCK: Any permitted.
1.18e) RETAINERS: Any permitted.
1.18f) STUD & GUIDE PLATES: Stud and guide plate conversions permitted.
1.18g) CAMSHAFT DRIVE SYSTEM: Stock type camshaft drive system required.
1.18h) ROCKER ARMS: Any permitted.
1.18i) REV KITS: Prohibited.
1.18j) PUSHRODS: Steel is only accepted material. Composite pushrods prohibited.
1.19 CARBURETORS
CARBURETORS: Limited to one automotive type carburetor. Split carburetor prohibited. Carburetor restricted to a maximum throttle bore size – 1.712-inch, maximum venturi size – 1.280-inch. Standard-style boosters are required (no aerosol, annular, etc).
1.19a) CARBURETOR MODIFICATIONS: Any permitted.
1.19b) AIR CLEANER: Commercially available, mass produced, unmodified, automotive type air cleaner required. All incoming air must pass through air cleaner.
1.20 FUEL INJECTION
Fuel Injection: OEM Ford EEC-IV or EEC-V engine control computer system required. NMRA accepted “plug-in” chips and EEC computer “add-ons” permitted. Ford EEC-IV or Ford EEC-V Speed density permitted for all combinations. OEM engine control computer must be functional.
1.20a) THROTTLE BODY: Only mass produced, commercially available throttle bodies permitted. Single throttle body in stock location required. Maximum throttle body size is 2.952” (75mm) for 5.0 & 4.6 2V applications. 4.6 4V may use aftermarket, commercially available, bolt-on throttle body. EGR spacer is not required.
1.20b) MASS AIR SIZE & TYPE PERMITTED: Commercially available, complete, mass produced mass air sensors required on all combinations (sample tube and elements required), including speed density equipped. Mass air sensor is not required to function. Mass air sensor must be standard draw through design. Maximum size of mass air sensor – 3.150-inch (80mm).
1.20c) FUEL INJECTOR SIZES & TYPES: Any size/type fuel injector permitted. Maximum of 8 fuel injectors located in stock location.
1.20d) AIR CLEANER: Commercially available, mass produced, unmodified, automotive type air cleaner required. All incoming air must pass through air cleaner.
1.20e) EFI ADD-ONS:
If your add-on computer is not on this list, it is prohibited.
1) FRPP Extender & FRPP EPEC
2) Anderson Ford PMS
3) Autologic Plug-in EEC Chip
4) Superchips Plug-in EEC Chip
5) Hyperchip Plug-in EEC Chip
6) Diablo Plug-in EEC Chip
7) EEC Tuner
8) SCT Xcalibrator & XCAL2
9) Diablo Predator
1.21 INTAKE MANIFOLD
INTAKE MANIFOLD: Only NMRA accepted, commercially available, mass-produced intake manifolds permitted
Any height spacer permitted between EFI upper and lower intakes only. All runners must be completely separated from each other runner. Spacer or gasket must not create a 'plenum', or any other means for air to pass between runners. Carb spacers permitted. Maximum 1.200-inch total thickness, including sandwiched gaskets. Maximum of one gasket (max. thickness 0.125-inch) between any mating surface. 4.6L 4V & 3V combinations may remove secondary runner controls. Only 4.6L 2V engines may use aftermarket as-cast throttle-body to intake manifold plenums.
1.21a) PORTING: Permitted for EFI upper & lower intake manifolds. Upper EFI manifold may be ported, but may not be cut, modified or welded. Runners may not be shortened. Carbureted intakes may be ported only 1” into runners (from intake mounting face), otherwise, porting/machining is prohibited on carbureted intakes.
1.21b) WELDING/EPOXY: Prohibited.
1.21c) PERMITTED INTAKE MANIFOLD LIST, PART NUMBERS: These are the only permitted intakes and part numbers for competition in this category. If your part number is not on this list consider it prohibited.
§ OEM Ford 5.0, & 4.6 Intakes – Upper & Lower
§ FRPP GT-40 Upper & Lower, PN# M 6001 A50
§ Edelbrock Performer – Upper & Lower, PN# 3821
§ Edelbrock Performer RPM – Upper & Lower, PN# 7126
§ Edelbrock Perfomer RPM II – Upper & Lower, PN #7123
§ Trick Flow Street Heat – Upper & Lower, PN# 51500001
§ Trick Flow Track Heat – Upper & Lower, PN# 51500002
§ FRPP 4.6 2V Hi-Flow Intake – Package, PN# M 9424 E46
§ Holley SysteMax – Upper & Lower, PN# 300-72
§ Saleen/Vortech – Upper & Lower
§ Edelbrock Performer** (carb only) – PN# 3721
§ Edelbrock Performer RPM** (carb only) – PN# 7521, 7121
§ Edelbrock Performer RPM Air Gap** (carb only)
§ Weiand Stealth** (carb only) – PN# 8011, 8311, 8020
§ Ford M-9424-T46
Reichard Racing 4.6L 2V Sheet metal Intake Manifold * for EFI / 4.6L 2V Use Only
Fox Lake Power Products P51 Intake Manifold * for EFI / 4.6L 2V Only
BBK Intake Manifold PN #5001
** These intakes may only be ported 1” into the intake manifold ports on the cylinder head side (from intake mounting surface). Porting/machining anywhere else is prohibited.
1.22 SOLENOIDS
SOLENOIDS: Prohibited.
1.23 TURBOCHARGERS
TURBOCHARGER: Prohibited.
1.24 AFTERCOOLER/INTERCOOLER
AFTERCOOLER/INTERCOOLER: Prohibited.
1.25 POWER ADDERS
POWER ADDERS: Prohibited.
Water injection is prohibited.
1.26 CRANKSHAFT
CRANKSHAFT: Stock or aftermarket cast iron or steel crankshaft required. Composite and/or multi-piece crankshafts prohibited. Stock 3.0-inch stroke, +/- .010-inch, mandatory for 302W applications. Stock 3.543-inch stroke, +/- .010-inch, mandatory for 4.6L 2V/3V/4V applications. Minimum rod bearing shaft diameter is 2.000-inch. Modifications to crankshaft permitted.
1.27 CONNECTING RODS
CONNECTING RODS: Stock or aftermarket steel connecting rods required. Composite connecting rods prohibited. 302W connecting rods must be 5.09-inch, +/- .025-inch, center to center length. 4.6L connecting rods must be 5.933-inch, +/- .025”, center to center length. Connecting rods may be of any design. Connecting rods may be free floating or press fit.
1.28 HEAD GASKETS & QUENCH AREA
HEAD GASKETS & QUENCH AREA: Pistons may be below block, even with deck, or above block at top dead center. Any type single head gasket permitted.
1.29 PISTONS, PINS, RINGS
PISTONS, PINS, RINGS: Stock or aftermarket piston permitted. Pistons for 5.0L, 4.6 3-valve & 4-valve must be flat top or dish design. Pistons for 4.6L 2-valve head combinations may be dome-type design. The use of 3 rings required. Gas porting any portion of piston assembly prohibited (side, top, or otherwise).Wrist pins for 302W based applications must be a minimum of .912-inch diameter. Wrist pins for 4.6L applications must be a minimum of .866-inch diameter. Valve reliefs optional.
1.30 BOOST CONTROLLERS
BOOST CONTROLLERS: Prohibited.
1.31 WASTEGATE & PRESSURE REGULATOR
WASTEGATE & PRESSURE REGULATOR: Prohibited.
1.32 VISIBLE COATINGS
Visible coatings are permitted where lubricants are present. Visible piston coating above the top ring is permitted. Visible coating of cylinder head runners, combustions chambers, and/or intake manifold runners/plenums prohibited. Visible coating of any external surface of cylinder head or intake manifold prohibited, including, but not limited to runners and/or plenums.
1.33 “O” Ringing of block
“O” RINGING OF BLOCK: Permitted.
2: Drivetrain
2.3 CLUTCH
CLUTCH: Standard Ford OEM factory-replacement-style single disc diaphragm clutch required. Steel or aluminum pressure plate a minimum of 10.0-inch in diameter is required. Adjustable and/or long-style pressure plates are prohibited. Clutch operation must be operated using factory style cable mechanism. 2005-up Mustangs using hydraulic clutch actuation may retro-fit ’79-’04 cable style mechanism.
2.4 DRIVESHAFT
DRIVESHAFT: Driveshaft required to be only steel or only alumium regardless of origin or manufacturer.
2.11 REAREND
REAREND: Any automotive type rearend permitted.
2.12 MANUAL TRANSMISSIONS
MANUAL TRANSMISSION: Only specified O.E.M. or specified aftermarket transmissions permitted. Overdrive gear(s) may be removed. Clutchless models prohibited. Any gear change must occur from direct action by the driver. Pneumatic, electric, hydraulic, etc. shifters prohibited. Pro-shifting is permitted. All transmissions must use either a) as produced, as supplied (unmodified) OEM gears and/or gear sets for transmission used or b) specified stock replacement helical cut gears and/or gear sets in the exact form as submitted for consideration and accepted by the NMRA. Gears and/or gear sets may not be utilized from other models (i.e. T-56 gears may not be used in T-5 transmissions). Transmission used is required to have a gear ratio in all gears as offered by the transmission used. Welding or grafting part of one countershaft to part of another counter shaft is prohibited.
2.12a) PERMITTED MANUAL TRANSMISSIONS:
Tremec T5, Tremec T45, Tremec T56, Tremec TR3550, Tremec TR3650, Tremec TKO, Tremec TKO-500, TKO-600, & Tremec TKOII.
2.12b): SHIFTER: Must be commercially available bolt on shifter. Must have a single handle and attach to the transmission using only a) the OEM type mounting bolts in the OEM mounting holes and b) must use a single pivot-ball type shifting arm.
2.12c) PERMITTED GEAR RATIOS:
Tremec T5(a) - 3.35, 1.99, 1.33, 1.00
Tremec T5(b) - 2.95, 1.94, 1.34, 1.00
Tremec T45 - 3.37, 1.99, 1.33, 1.00
Tremec T56(a) - 2.66, 1.78, 1.30, 1.00
Tremec T56 (b) - 2.97, 2.07, 1.43, 1.00
Tremec TR3550 - 3.27, 1.98, 1.34, 1.00
Tremec TR3650 - 3.38, 2.00, 1.32, 1.00
Tremec TKO/TKOII - 3.27, 1.98, 1.34, 1.00
T5 w/G-Force PN#5000 Dog Ring - 2.92, 1.99, 1.34, 1.00
T5 w/G-Force PN#5000 Syncro - 2.94, 1.94, 1.34, 1.00
Tremec TR3550/TKO/TKOII w/Liberty Gear PN#LG3500 - 2.92, 1.95, 1.34, 1.00
Tremec TKO-500 - 3.27, 1.97, 1.34, 1.00
Tremec TKO-600 - 2.87, 1.89, 1.28, 1.00
T5 w/G-Force PN#5000 Dog Ring – 3.22, 1.99, 1.34, 1.00
2.12b): SHIFTER: Must be commercially available bolt on shifter. Must have a single handle and attach to the transmission using only a) the OEM type mounting bolts in the OEM mounting holes and b) must use a single pivot-ball type shifting arm.
2.13 PURPOSE BUILT TRANSMISSIONS
PURPOSE BUILT TRANSMISSIONS: Prohibited.
2.14 AUTOMATIC TRANSMISSIONS
(OEM American transmissions or replicas of OEM American transmissions that use planetary gears)
AUTOMATIC TRANSMISSIONS: Ford AOD, AOD-E, 5R55S, & 4R70W transmissions with torque converter are required. Transbrake permitted. Overdrive gear may be removed. Pneumatic, electric, hydraulic, etc. shifters prohibited.
3: BRAKES & SUSPENSION
3.1 BRAKES
BRAKES: All cars must have front and rear hydraulic brakes. Automated brakes or any type of traction control is prohibited. Application and release of brakes must be a function of the driver’s foot. Line loc permitted on front wheels only. Any other electric, pneumatic, or hydraulic device in the system is prohibited.
3.2 SHOCK ABSORBERS
shock absorbers: each vehicle in competition must be equipped with one operative shock absorber for each sprung wheel. Shock absorbers may be either hydraulic or friction type, securely mounted and in good working order.
3.3 STEERING
STEERING: Power assisted or manual aftermarket steering system in stock location mandatory.
3.4 Suspension, FRONT
FRONT SUSPENSION:
3.4a) K-MEMBERS: Aftermarket K-Members permitted, but must attach to the chassis using only the original eight (8) factory O.E.M. type mounting bolts in the factory mounting location. No part of the K-member may be permanently attached to the chassis. K-member may be modified in oil pan area to allow oil pan enlargement or removal.
3.4b) STRUT TOWER: Factory strut tower required. No modifications may be made to the strut towers other than the roll bar or roll cage may be welded to the strut towers for safety purposes.
3.4c) CONTROL ARMS: Aftermarket tubular control arms permitted that are attached in stock locations.
3.4d) SHOCKS/STRUTS: Aftermarket struts and shocks permitted provided stock attachment locations are used.
3.4e) SPRINGS: Aftermarket springs permitted.
3.4f) COIL OVERS: Coil over shocks and struts permitted. OEM mounting location required.
3.4g) CAMBER PLATES: Bolt on type camber plates permitted. Bolt on plate may be tack welded to strut tower to prevent movement (2.00-inch max length), otherwise welding prohibited. Camber plate may only be attached to top flat portion of strut tower. Attachment to any other structure prohibited.
3.4h) SPINDLES: Only stock OEM or NMRA accepted, bolt-on, commercially available aftermarket spindles permitted. NMRA accepted spindles are Anthony Jones Engineering, RaceCraft, Strange, & Santhuff.
3.4 SUSPENSION, REAR
REAR SUSPENSION: Stock type suspension, including stock 4-link, and traction bars permitted. Rear coil-over shocks prohibited.
Stock Type Suspension: Stock type suspension may utilize aftermarket, direct replacement type suspension components including aftermarket replacement shocks, springs (in factory location), and/or control arms. All stock type 4-link suspensions must maintain stock lateral angles and attachment points, but may be moved up or down on rear axle. Aftermarket torque arms permitted.
3.4a) 3-LINK and 4-LINK: Stock or stock-type direct-replacement 3-link and/or 4 links required. All stock type 3 or 4 link suspensions must maintain stock lateral angles and attachment points, but may be moved up or down on rear axle. Retrofitting and/or cross-breeding of 3-link and 4-link components prohibited.
3.4b) LADDER BARS: Prohibited.
3.4c) REPLACEMENT CONTROL ARMS: Replacement aftermarket O.E.M. style upper and lower control arms permitted. Control arms may use any type bushing, bearing, or rod end. Control arms may be adjustable to any length.
3.4d) PANHARD BARS: Panhard bars permitted to control lateral movement of rearend housing. Panhard bars must be located aft of rearend housing, and control only lateral rearend movement. Panhard bars may be welded.
3.4e) SWAY BARS: Aftermarket or factory sway bars permitted. Aftermarket sway bars may be welded to both chassis and rearend housing.
3.4f) TORQUE ARMS: Permitted.
3.4g) REAR SHOCKS & SPRINGS: O.E.M. or aftermarket style shocks & springs required in stock location. Coil-over springs prohibited. Shocks must be stand alone and may not be adjustable during run via any means.
3.4h) TRACTION BARS: Bolt on traction bars with permanent (welded or bolted) rear end mount and rubber snubber (or rubber bushing with permanent mount) on chassis side permitted.
3.4i) TORQUE BOXES: The Wild Rides “S” Box has been deemed an acceptable OEM Fox-body torque box replacement when installed in the OEM location as per Wild Rides official instructions. The only acceptable control arm mounting location for the upper control arms is the middle hole on the “S” box, which is the same as the stock OEM mounting location.
3.6 WHEELIE BARS
WHEELIE BARS: Prohibited.
4:FRAME
4.4 FRAME
FRAME: Stock, unaltered frame rails required in front and rear subframes. Subframes may be joined under car. Maximum size material to be used; 2x3x1/8 inch rectangular tubing or 1 5/8 O.D. inch round tubing (.118MS or .083CM). If connector protrudes through floor, floor must be completely welded to connector.
4.5 GROUND CLEARANCE
GROUND CLEARANCE: Minimum 3 inches from front of vehicle to 12 inches behind centerline of front axle; 2 inches for remainder of vehicle, except oil pan and exhaust headers.
4.12 WHEELBASE
WHEELBASE: Entries must retain stock wheelbase + or - 1 inches of stock. Maximum variation from left to right and front to back is 1 inch.
5: tires & wheels
5.1 Tires
TIRES - FRONT: Front tires must have a minimum tread width of 4.5 inches.
TIRES – REAR: Street type or racing slicks permitted. Maximum actual measured tire size is as follows: Actual measured tread of tire is limited to 10.6 inches by 26.5 inches tall. Tire width will be measured by a “go-no go” gauge after conclusion of run at scale area. Tire tread may not extend outside fenders. Tire shaving is prohibited.
5.2 WHEELS
WHEELS: Spindle-mount front wheels prohibited.
6: INTERIOR
6.1 INTERIOR
Interior, GENERAL: Must maintain stock appearance; including factory OEM dashboard, headliner, & steering column cover. Heater/air conditioners may be removed.
6.4 CARPET
CARPET: Floor and tunnel where visible must be upholstered or carpeted. Headliner required.
6.5 SEATS
SEATS: Upholstered OEM or aftermarket upholstered seats (2) in stock location is required. Rear seat may be removed; area must be carpeted or upholstered.
6.6 DOOR PANELS
DOOR PANELS: Door panels must be covered and stock appearing.
6.7 STEERING COLUMN
STEERING COLUMN: Stock O.E.M. steering column required. Removable steering wheel permitted.
6.8 GAUGES
GUAGES: Aftermarket gauges may be installed in factory dash.
6.9 PEDALS/PEDAL LOCATION
PEDALS/PEDAL LOCATION: Stock type pedals, linkage, and location required.
7: Body
BODY: Vehicle must retain original or NMRA accepted appearances and profiles for year and make of body. Original O.E.M. body shell (unibody structure from firewall to taillight panel must be intact). Only 1979 & newer Foxed based and 2005 to present Mustang Ford body styles permitted. Lightweight body parts restricted to hood. Hood must be hinged or lift off. Deck lid must be hinged, lift off deck lids prohibited.Body must be finished and painted. Alterations or aerodynamic modifications such as “chopped tops”, “channeling”, “sectioning”, “shortening” or “scaling down” prohibited.If a convertible top is used as an entry the use of ANY mechanism under or above the convertible top is not permitted. Ex: Building a cover that would be located above or below the convertible top, using straps below or above the convertible top, etc. Convertible top must be operational. Convertible entries must compete with top up.
7.1 ADVERTIsING
GRAPHICS: Graphics (for advertising or creative purposes) permitted on entire body, including doors, hood, rear quarter panels, front fenders, wing, etc.
CONTINGENCY DECALS: In order to be eligible for NMRA official contingency program, all contingency decals are required to appear only on the rear quarter windows or rear window in a clear and organized fashion. Contingency decals may not be overlapped or modified. Other decals and sponsorship (non-contingency) may appear on bodywork, front end, and on windows.
NMRA REQUIRED DECALS: The following decals are required for competition in NMRA events.
NMRA Windshield Decal – must be installed on top of windshield. This NMRA decal must be the only decal on top of windshield. Other vehicle sponsor decals may be placed at base of windshield.
NMRA 2007 Drag Racing Series “Side” Decals – must be installed on each side of vehicle on quarter windows.
Class Sponsor Decal – class sponsor decal must be installed on base of windshield on the passenger side.
Permanent Numbers – permanent numbers are required for competition in this class. Must be on front, rear, and both side windows.
7.2 SPOILERS
Rear SPOILER: Rear spoilers permitted, may not extend more than 26 inches from the transition point with the body to the rear most portions. Rear spoiler may not be molded into body (Pro Mod Style).
Spoilers must be stationary during entire run. A positive locking device to prevent movement required. Spring loaded spoilers prohibited. Spoiler spill plates (if used) may be a maximum of 12” in height.
7.5 FIREWALLS
Firewall: Stock, unaltered firewall required.
7.6 FLOOR/TRUNK PAN/TRANSMISSION TUNNEL
FLOOR: Stock, unaltered floor-pan, except for through the floor sub frame connectors, required from firewall to back bumper. Transmission tunnel must remain stock & unaltered. Removable floor-pan sections and/or transmission tunnels prohibited. Only spare tire well may be removed/replaced , all other rear floor pan and trunk pan must be intact.
7.7 HOOD/SCOOP
Hood/Scoop: OEM or aftermarket hood permitted. Forward mounted hood scoops must be closed during competition. Cowl induction hoods restricted to a maximum of 5 inches as measured from the hood surface next to the scoop to the top of the scoop along the entire scoop. The entire induction system must be completely covered by hood. Hood must be attached separately in a conventional manner and must be lift off or bolt on.
7.9 WINDSHIELDS/WINDOWS
Windows: O.E.M. safety glass required. Driver and passenger windows must be closed during racing. Windows must be operative. NHRA-approved Lexan may be used to replace OEM sunroof glass and OEM T-Top glass, when installed in an NHRA-approved manner.
7.10 BUMPERS
Bumpers: not Applicable. License plate frame holders are not permitted to extend beyond flat surface of front bumper. No body components, bumper add-ons, or body kits are permitted to be added to the vehicle with the intent of increasing the frontal distance of the bumper for the purposes of breaking the infrared beams.
7.11 FENDER SPLASH PANS
Fender Splash Pans: Full, factory OEM sheet metal inner fenders required.
7.12 GRILLE
GRILLE: Stock grille required. Blocking of grille to prevent air passage is prohibited.
7.13 WHEELWELLS
INNER WHEELWELLS: Stock inner wheel wells required, may not be sectioned or replaced.
OUTER FENDERS: Leading and trailing edges of outer fenders may be trimmed for tire clearance, maximum 2”.
7.14 RAM AIR/ENGINE AIR PANS
Ram Air: Only commercially available ram-air/cold-air kits permitted. Headlights/taillights/hazard lights may not be removed/modified for air induction. Final acceptance is with the discretion of NMRA Technical Department
Carbureted applications may only get induction air from rear of hood/cowl area or under hood.
7.15 DOORS
Doors: Driver and passenger doors must be functional and operable from inside and outside of vehicle.
7.16 AERODYNAMICS
AERODYNAMICS: Taping of any body parts, seams, or front end prohibited. Removal of side mirrors prohibited. Head light covers permitted. Fog light covers permitted.
7.17 BODY KITS
BODY KITS: Only accepted, commercially available aftermarket body kits permitted. Filled-in lower valance prohibited, whether OEM or commercially available aftermarket. Blocking any portion of lower valance area (in front of behind valance) with Plexiglas or other materials prohibited.
7.18 COWL AREA
COWL AREA: Cowl area of vehicle must be unaltered.
7.19 FRONT FENDERS/FRONT FASCIA
FRONT FENDERS/FRONT FASCIA: Stock or stock replacement front fenders and front fascia required. Filled-in lower valance, whether OEM-modified or as-supplied aftermarket valance, prohibited. May not be one-piece front end. Hole(s) in front bumper prohibited.
8: Electrical
8.1 BATTERY/CHARGING SYSTEM
BATTERY: Battery may be relocated. Charging systems must be functional and crank driven by the factory style 6 rib serpentine belt.
8.3 Ignition
IGNITION: Any battery operated ignition permitted. Any distributor drive system permitted.
8.5 STARTER
STARTER: All entries must be self-starting with on-board starter.
9: SUPPORT GROUPS
Bracket racing aids such as optical sensors, delay boxes, stutter boxes, etc. prohibited. Throttle stops prohibited. The application or use of any device, mechanical or electronic, that permits the driver to ascertain the position of their vehicle in relation to the starting line is prohibited.
9.2 OnBoard Diagnostics/Data Recorders
ONBOARD DIAGNOSTICS/DATA RECORDERS: External data recorders & data loggers are prohibited.
Stand-alone wide band oxygen sensors and recorders permitted, however device may not be capable of data logging additional sensors and/or analog inputs, with the sole exception of tachometer signals
Any wide-band 02 device must be capable of only logging air/fuel ratio, and may not be run in closed loop with EFI or ignition system. Only a single 02 sensor is permitted to be installed in header collector only. EFI systems if standard equipped are permitted to record engine functions only of the vehicle. Playback tachometers permitted including those that record driveshaft RPM. Any wiring monitoring engine or drive train functions other than those specifically permitted are prohibited. Laptops prohibited in vehicle during competition.
9.8 TOW VEHICLES
TOW VEHICLES: Vehicles may not be towed in or to staging lanes, violation will result in disqualification of run. Vehicles may not be towed from the return road. Vehicle may be towed from scales.
10: DRIVER
10.4 CREDENTIALS
CREDENTIALS: See general regulations.
11: CLASS & SAFETY REQUIREMENTS
It is the participant’s responsibility to familiarize oneself with the class requirements as found in the 2007 NMRA rulebook and the safety requirements as found in the 2007 NHRA rulebook.
The participant agrees that the participant bears the ultimate responsibility at all times to ensure the safety of participant’s vehicle and to ensure that participant complies with all applicable NHRA & NMRA rules. The participant agrees that participant is in the best position to know about the construction and operation of participant’s vehicle, equipment, and clothing, and whether there has been compliance with all applicable NHRA & NMRA rules.
12: Street-Legal Requirements
Headlights and tail lights for year & make of body used mandatory. Head lights & tail lights required to be functional.
RULES ADJUSTMENTS, MID SEASON LOG
Date: Adjustment:
None at this time.