Thom Bates
12-12-2006, 05:34 PM
DRAG RADIAL
NMRA SERIES 2007 RULES
Preliminary Version 1.1
Class Overview
Drag Radial is designed for small block single power adder 1979 and newer Ford Fox bodied and Ford powered vehicles using street-type D.O.T. radial tires. Drag Radial entries are limited to 302, 351 and 4.6L/5.4L modular engine types. All engine types are permitted a maximum of 440 cubic inches. Drag Radial class will be held at all NMRA events in 2007.
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 2006 accepted lists only up until January 1, 2007. After this date, NMRA will consider manufacturer requests for new products for the 2008 season.
Weight Breaks:
POWER ADDER BASE CI WEIGHT
Turbocharged – 82mm 360 2925
Turbocharged – 85mm 360 3125
Turbocharged – 88mm 360 3375
Supercharged 360 3100
Supercharged (X-TRIM, F1R, F1C) 360 3300
Nitrous Oxide 360 2600
Nitrous Oxide 415 2800
Nitrous Oxide 440 2950
Maximum cubic inch – 440.
Forced Induction entries without intercooler may deduct 200 lbs from vehicle weight.
Modular-equipped entries may deduct 150 lbs from vehicle weight.
Nitrous entries using non-Victor or TFS “R” heads may deduct 150 lbs.
Note: 10 lbs/cu in penalty applies for cubic inches over base weight break.
Note: All weights are with driver & rounded down to the five pound increment. Ex: A calculated weight of 2968 would be required to weight 2965 with driver at scales.
Class Rules, DRAG RADIAL
1: ENGINE
1.1 COOLING SYSTEM
RADIATOR: Maximum of two OEM production-style or aftermarket radiators is required and must be mounted in front of engine. Stock radiator core support is required.
Water pump: Any permitted.
COOLING FANS: Any permitted.
1.2 Engine
ENGINE: Engine limited to 302, 351, and 4.6L/5.4L modular engine types. Any accepted engine combination permitted in any accepted body style. Engine swapping permitted during event.
1.2a) ENGINE DRIVE BELT SYSTEM: Any permitted.
1.3 Exhaust
EXHAUST: All entries allowed to use tubular headers. Adapter plates permitted to bolt headers to cylinder head. 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. Mufflers are not required on wastegate outlets.1.3a) HEADERS & COLLECTORS: Any headers and/or collectors permitted.
1.3b) EXHAUST TUBING/SIZE: Any tubing size permitted.
1.3c) TAILPIPE & EXHAUST RULES: Full exhaust not required.
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.
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 outside driver’s compartment and inside body lines. 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 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. NMRA allows no greater reading than a “0” on the fuel-check meter. Failure to pass fuel check is grounds for disallowance of the run during qualifying and disqualification from the event during eliminations.
1.6a) SPEC FUEL: Not required.
1.9 NITROUS OXIDE
NITROUS OXIDE: Any NMRA accepted single or multiple nitrous system permitted. A maximum of 3 stages is allowed. The use of agents other than nitrous oxide as part of, or mixed in, the system are prohibited. Nitrous oxide may not be used in conjunction with any other power adder. If entry is entered as a non-nitrous entry, all solenoids, lines, fittings, and bottles must be removed prior to technical inspection and any competition runs. Nitrous oxide systems must use gasoline only for the fuel enrichment circuit.
1.9a) NITROUS PUSH SYSTEMS
PUSH REGULATIONS: Push systems are permitted. Push systems may only use air as a propellant. Air cylinders must be D.O.T. approved and rated for vehicle transport. Air cylinders must be securely fastened in the vehicle in accordance with NHRA & IHRA safety regulations. All other components of the system must comply with applicable NHRA regulations.
PURGE: Nitrous purge systems permitted. 1.10 OIL SYSTEM
OILING SYSTEM: Wet sump oiling system required. Dry sump oiling system prohibited. External oil pumps permitted. Any vacuum pump and/or evacuator system permitted. Any oil pan permitted.
1.12 SUPERCHARGER
Multi-staged supercharged induction systems are prohibited.
ROOTS TYPE SUPERCHARGER: Prohibited.
SINGLE CENTRIFUGAL SUPERCHARGER: Only centrifugal superchargers are permitted in Drag Radial. Allowed superchargers are restricted to NMRA accepted, commercially available, standard mass production style supercharger units. Internal of supercharger units (gearing, impeller, drive train) etc. may not be modified in any area. Supercharger compressor wheel must be constructed of cast or billet aluminum and must be NMRA accepted for the specified supercharger unit. Exotic material wheels prohibited. Pushrod-based engines must use standard rotation (non-reverse) supercharger, with supercharger inlet mounted rearward facing. Modular-based engine may use reverse rotation supercharger.
1.12a) PULLEYS/BELTS: Cog belt drive or serpentine-drive belt systems required.
1.12b) PERMITTED MODELS:The following makes and models of superchargers are the only units permitted. If your supercharger is not on this list, it is prohibited.
Vortech – A,B,S,Y,R,J,JT,T,YS,V7-Ysi, V27-Ysi, & X-trim, V24-X-trim models
Procharger – D1,D1X,D1R,F1,F1C-5.0, F1R models
Paxton Novi 1000, 1200, 2000 models
Powerdyne BD-9;BD-10;BD-11;XB-1A
1.12c) GEAR RATIOS: Internal gear ratios may not be altered from stock.
PERMITTED GEAR RATIOS:
Vortech - A,B,S,Y,R,J,JT,T,YS, YSi & X trim models 3.45:1 or 3.60:1
Vortech – V24 X, V27-Ysi 4.25:1
ATI Procharger D1,D1X,D1R 4.44:1
ATI Procharger F1,F1R, F1C-5.0 5.00:1
Paxton Novi 1000,1200,2000 3.45, 3.54, 3.50:1, 3.60:1
Powerdyne BD-9;BD-10;BD-11;XB-1A
1.12d) COMPRESSOR WHEELS: Supercharger compressor wheel must be constructed of cast or billet aluminum and must be NMRA accepted for the specified supercharger unit. Exotic material wheels prohibited.
1.15 BLOCK
Block: Any cast iron Ford type 302/351 permitted. Any cast iron or cast aluminum 4.6/5.4 based engine block permitted. Block must maintain Ford O.E.M. bore spacing, Ford O.E.M. deck heights, and Ford O.E.M. crankshaft spacing. 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 and solid engine mounts permitted.
1.17 CYLINDER HEADS
GENERAL GUIDELINES:
302/351 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.4.6/5.4 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: 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. Internal port areas of Non-Victor and Non-TFS”R” cylinder heads may be welded or epoxied. Victor and TFS ”R” heads may not be welded or epoxied. All heads must maintain standard “as produced” valve layout design, valve cant, etc. (no fabricating a canted valve design from an inline head, etc.)
1.17b) HEADS, MASS PRODUCED: Only mass produced, commercially available, NMRA accepted, cast aluminum or cast iron small 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: Permitted for Non-Victor and Non-TFS”R” heads only. Prohibited for Victor or TFS “R” heads.
1.17f) HEADS, VALVES: Any valve permitted. Bronze lined or replacement guides permitted.
1.17g) HEADS, MILLING: No regulations limiting milling.
1.17h) HEADS, PUSHROD SLEEVES: Permitted.For Victor and/or TFS “R” entries, pushrod sleeves are permitted, however the use of welding or epoxy to secure sleeves prohibited.
1.17i) HEADS, COMBUSTION CHAMBER VOLUME: No regulations limiting combustion chamber volume.
1.17j) HEADS, PORT PLATES/ADAPTER PLATES: Intake port plates prohibited, exhaust port plates maximum thickness ½” 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.
§ Ford OEM 289/302/351/5.0 Windsor & OEM 4.6/5.4L
§ FRPP GT-40/GT-40P/GT-40X/GT-40Y, N351, J302 & Z304
§ FRPP 4.6 2V & 4V Cylinder Heads
§ Edelbrock Performer & Performer RPM PN# 60329, 60359, 60279,60229, 60259, 60269
§ Edelbrock Victor Jr. A/C and CNC PN# 77169, 77179,77189,77389,77399,61269,61279,61309
§ Edelbrock Victor A/C & CNC & Glidden PN# 77219,77289, 77299,77099, 61099, 61299, – Nitrous Applications Only
§ Trick Flow Twisted Wedge (Non-R) and Track Heat Heads
§ Trick Flow Specialties “Street Heat”
§ Trick Flow Specialties Twisted Wedge “R” Cylinder Heads – Nitrous Applications Only
§ Brodix ST 5.0 Aluminum Cylinder Heads, PN# ST 5.0, ST 5.0R
§ Brodix Track 1, T1X
§ Holley 5.0 Aluminum Cylinder Heads, PN# 300-573, 574, 575, 576, 577, 578, 579
§ World Products Roush 180, Windsor Jr, PN# 53030, 23030
§ World Products Roush 200, Windsor Sr, PN# 53040
§ Dart Pro 1 A/C & CNC 170cc, 195cc, 210cc, 225cc
§ Air Flow Research 165, 185, 205, 225
§ Canfield PN# 18-350, 20-450, 20-475
§ RHS 180cc, 200cc & 215cc (Iron & Alum)
Note: Stock factory OEM heads are those cylinder heads that are factory production line installed on production vehicles as recognized by NHRA.
1.17m) INTAKE PORT LOCATION: Bottom of intake port may not be greater (farther) than .960” from head mounting surface. Purposeful erratic machining of the port floor to bypass this rule is prohibited.
1.17n) INTAKE PORT HEIGHT: Maximum port height is 2.40” as measured at intake manifold mounting surface.
1.18 VALVETRAIN
1.18a) CAMSHAFT: Any permitted.
1.18b) LIFTERS: Any permitted.
1.18c) LIFTER BORES: Lifter bores permitted to be bushed.
1.18d) VALVE LOCK: Any permitted.
1.18e) RETAINERS: Any permitted.
1.18f) ROCKER ARMS: Any permitted.
1.18g) CAMSHAFT DRIVE SYSTEM: Any permitted.
1.18h) REV KITS: Any permitted.
1.18j) PUSHRODS: Steel is only accepted material. Composite pushrods prohibited.
1.19 CARBURETORS
CARBURETORS: Entries restricted to 4150 or 4500-style single carburetor. Split carburetor prohibited (example: a Dominator, split and offset into two two-barrels). Standard-style or annular boosters are accepted.
1.20 FUEL INJECTION
Fuel Injection: Fuel injection must be electronic. Only mass produced, commercially available throttle bodies permitted. Single throttle body permitted up to a maximum of 90mm in any location.
1.20a) MASS AIR SIZE & TYPE PERMITTED: Any permitted.
1.20b) FUEL INJECTOR SIZES & TYPES: Any size/type fuel injector permitted. Maximum of 8 fuel injectors located in stock location.
1.21 INTAKE MANIFOLD
INTAKE MANIFOLD: Cast aluminum, carburetor type and EFI style, intake manifolds with a common plenum required for all combinations. Intake manifold must be commercially available and mass-produced. Porting, welding, or epoxy permitted on interior of intake only. Porting, welding, or epoxy prohibited on exterior of intake, with the sole exception of welding/epoxy on nitrous/fuel injector bungs and EFI-style lower intakes, which may have minor epoxy/weld added to the exterior of the intake runners only. Carburetor spacers limited to a maximum thickness of 3.200-inch, including gaskets. Tunnel rams of all types prohibited. Sheet-metal/fabricated intakes are prohibited, with the exception of sheet-metal, or carbon fiber upper, intake manifolds only for EFI applications, which are permitted. The Reichard Racing 4.6L 2 valve sheet metal Intake Manifold is accepted for use for EFI 4.6L 2 valve Use Only
1.22 SOLENOIDS
SOLENOIDS: Number of solenoids not restricted.
1.23 TURBOCHARGERS
Only one turbocharger permitted.
SINGLE TURBOCHARGER: Accepted single turbochargers are permitted with the following requirements: Turbocharger must be of conventional impeller and housing design and type. Turbocharger is limited to a choice of three turbochargers (at three weight breaks):
[a] maximum size of 82.0 mm/3.228” - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. Inlet housing is permitted a maximum inlet diameter of 3.308”where the leading edge of the compressor wheel meets the housing.
maximum size of 85.0 mm/3.346” - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. Inlet housing is permitted a maximum inlet diameter of 3.426”where the leading edge of the compressor wheel meets the housing.
[c] maximum size of 88.0 mm/3.464” - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. Inlet housing is permitted a maximum inlet diameter of 3.544”where the leading edge of the compressor wheel meets the housing.
Compressor wheel to housing clearance must maintain a maximum of 0.080” clearance beginning from a) where the leading edge of the compressor wheel meets the inlet of the compressor housing to b) the transition point where the trailing edge of the compressor wheel meets the volute. All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas, or any other substance into the inlet or exhaust housing prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited. The tips of the impeller wheel may not be stepped, cut down, or notched to meet impeller tip-to-tip dimension. (.500-inch will define the tip of the impeller wheel).
1.24 AFTERCOOLER/INTERCOOLER
AFTERCOOLER/INTERCOOLER: One and only one aftercooler/intercooler permitted only on forced induction entries. Air-to-air or air-to-water/ice are the only systems permitted. Water and/or ice are the only components permitted in the reservoir.
1.24a) AFTERCOOLER/INTERCOOLER LOCATION: There are no restrictions as to location of aftercooler/intercooler.
1.25 POWER ADDERS
POWER ADDERS: Any single power adder (nitrous oxide, supercharger, turbocharger) permitted with engine combination. See sections 1.9, 1.12, & 1.23.
Water injection is prohibited.
1.26 CRANKSHAFT
CRANKSHAFT: Cast iron or steel crankshaft required. Composite and/or multi-piece crankshafts prohibited.
1.27 CONNECTING RODS
CONNECTING RODS: Any steel, aluminum, or titanium connecting rods required. Composite Connecting rods prohibited.
1.28 HEAD GASKETS & QUENCH AREA
HEAD GASKETS & QUENCH AREA: No restrictions.
1.29 PISTONS, PINS, RINGS
PISTONS, PINS, RINGS: Any piston, pin, ring combination permitted.
1.30 BOOST CONTROLLERS
BOOST CONTROLLERS: Electronic or automated boost controllers permitted on turbocharged applications only. Boost controller, whether electronic or manual, must be a stand alone device and may not be incorporated into any traction control system (or engine control feedback loop) of any type. Blow-off valve, regulators, and associated tubing and hardware must be contained within the engine compartment. C02 bottles utilized to control waste gate functions may be contained within interior.
1.31 WASTEGATE & PRESSURE REGULATOR
WASTEGATE & PRESSURE REGULATOR: Any permitted. Mufflers are not required on wastegate outlets.BOOST BYPASS/BLOW OFF VALVES: All boost bypass valves & blow-off valves must be contained entirely in the engine compartment.
1.32 VISIBLE COATINGS
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 permitted.
1.33 “O” Ringing of block
“O” Ringing of Block: Permitted.
2: Drivetrain
2.3 CLUTCH
CLUTCH: Prohibited.
2.4 DRIVESHAFT
Driveshaft: Any permitted.
2.11 REAREND
REAREND: Any automotive type rearend permitted.
2.12 MANUAL TRANSMISSIONS
MANUAL TRANSMISSION: Prohibited.
2.13 PURPOSE BUILT TRANSMISSIONS
PURPOSE BUILT TRANSMISSIONS: Prohibited.
2.14 AUTOMATIC TRANSMISSIONS
[B](OEM American transmissions or replicas of OEM American transmissions that use planetary gears)
AUTOMATIC TRANSMISSIONS: Any OEM American automatic transmission or a replica of an OEM American automatic transmission that uses planetary gears and torque converter permitted. Transmission-to-engine adapters are permitted. Lock-up transmissions/torque converters permitted only in transmissions that came OEM-equipped (ex: AOD, AOD-E). Trans brakes permitted. Automatic transmission entries run at listed base weights. Pneumatic, electric, hydraulic, etc. shifters prohibited. Any gear change must occur as a result of an internal function of the transmission or from direct action by the driver. Clutch not permitted with this type of transmission.
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: Manual or power assisted 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 following: 1) roll bar or roll cage may be welded to the strut towers for safety purposes 2) clearancing of strut tower permitted for supercharger tubing.
3.4c) CONTROL ARMS: OEM or tubular stock type control arms required which are attached in stock location.
3.4d) SHOCKS/STRUTS: O.E.M. or aftermarket style shocks/struts & springs required in stock location. Shocks must be stand alone and may not be adjustable during run via any means.
3.4e) SPRINGS: Aftermarket springs permitted.
3.4f) COIL OVERS: Coil over shocks and struts permitted. Stock 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 (maximum 2.00-inch), 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 Racecraft, Anthony Jones Engineering, Strange, & Santhuff.
3.4 SUSPENSION, REAR
REAR SUSPENSION: Stock type suspension required. Rear coil-over shocks permitted.
Stock Type Suspension: Stock type suspension may utilize aftermarket, direct replacement type suspension components including aftermarket replacement shocks, springs, and/or control arms. All stock type 3-link and 4 link suspensions must maintain stock lateral angles and attachment points, but may be moved up or down on rear axle. Aftermarket torque arms and coil-overs 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 upper and lower control arms and permitted. Control arms may use any type bushing, bearing, or rod end. Control arms may be adjustable to any length.
3.4d) PANHARD BARS: Permitted. Panhard bars must be located aft of rearend housing. 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: Any permitted, including coil over shocks and springs. Shocks must be stand alone and may not be adjustable during run via any means.
3.4h) TRACTION BARS: Bolt on traction bars 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: All wheelie bars must have a non-metallic wheel. Wheels must turn freely at starting line. Wheel preload is prohibited. Using the wheelie bar as a “fifth wheel” sensing device is prohibited. Hydraulic, pneumatic, electronic, etc. or any other adjustment or movement during run is prohibited.
4:FRAME
4.4 FRAME
FRAME: Stock, unaltered frame rails required in front subframe. 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. Stock rear subframes are required, but outer frame rail portion only may be notched for tire clearance only. When notching, stock inboard section of rear frame rails must remain stock, unaltered, and in stock location. Rear frame rail must remain in OEM stock condition in all areas. Notching (vertically) for rearend clearance permitted only on 2005-07 Ford Mustang rear frame rails, which may be notched a maximum of 2-inches vertically for rear end housing clearance only. The upper part of the rail must remain intact. Complete rear frame must be visible for tech purposes.
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: Accepted street-type D.O.T. Radial tires are required. Drag radial tires must be suitable and designed for street use. Tire tread may not extend outside fenders. Tire shaving is prohibited. The following sidewall designation D.O.T. drag radial tires are the only designations permitted: 275/50; 275/60; 325/50. The following sidewall designations are prohibited: 315/60; 295/65. Slicks & wrinkle wall tires are prohibited.
5.1a) Permitted street-type D.O.T. radial tire list:
· BFGoodrich Comp T/A Drag Radial
· BFGoodrich G-force T/A Drag Radial
· Nitto NT555R Drag Radials
· Also accepted: any approved radial-construction tire with a D.O.T. tread wear rating of 180 or greater that fits all other criteria and sizing.
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: Aftermarket steering column permitted. 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 Fox based and 2005 to present Mustang Ford body styles permitted. Lightweight body parts are restricted to hood and trunk-lid/hatch/deck-lid. Hood and/or trunk lid must be hinged or lift off. Funny car bodies 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 does not need to 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.
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 and shifter clearance, required from firewall to back bumper. Flat area of floor-pan after “kickup” for rear end (behind rear seat area) and rearward may be replaced with a minimum of .024” inch thick steel or .032” inch aluminum. Magnesium is prohibited. Transmission tunnel must remain stock & unaltered. Removable floor-pan sections and/or transmission tunnels prohibited.
7.7 HOOD/SCOOP
Hood/Scoop: Lightweight cowl induction-style hood permitted. Forward mounted scoops prohibited. OEM forward mounted scoop must be closed during competition. The entire induction system must be completely covered by hood, which must be part of the vehicle hood. Hood must be attached separately in a conventional manner and must lift off or be bolt on.
7.9 WINDSHIELDS/WINDOWS
Windows: O.E.M. safety glass required. Driver and passenger windows must be closed during racing. Windows do not have to 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: Aftermarket wheel tubs permitted. Material used to add to the width of the inner wheelwell may be steel, aluminum, fiberglass, or carbon fiber.
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
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: Accepted, commercially available body kits permitted. Filling in the lower valance permitted if completed in a permanent manner (taping not permitted).
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. May not be one-piece front end. Filled-in lower valance, permitted. Hole(s) in front bumper for the purpose of air induction prohibited.
8: Electrical
8.1 BATTERY/CHARGING SYSTEM
BATTERY: Battery may be relocated. Charging systems optional.
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: Onboard diagnostics and data recorders used to monitor and record parameters such as a driveshaft speed, acceleration, nitrous timing, chassis strain, suspension travel etc., permitted. Wide band oxygen sensors permitted. “Playback” tachometers permitted (i.e. Autometer Dual Channel Ultimate II tachometers, and the use of its features). Laptops permitted in vehicle.
9.7 BOTTLES
BOTTLES: All bottles must be securely mounted, stamped with a minimum DOT–1800lb. rating, and identified as nitrous oxide. Bottle located in driver’s compartment must be equipped with the correct relief valve per manufacturer recommendations and vented outside the driver’s compartment. The use of any agents other than nitrous oxide as a part of, or mixed with, this pressurized fuel system is strictly prohibited. (Push systems are prohibited.) Commercially available, thermostatically controlled, blanket type bottle heaters are acceptable. Any other method of heating bottles in vehicle is prohibited.
9.8 TOW VEHICLES
TOW VEHICLES: Vehicles may not be towed in or to staging lanes. Vehicles may not be towed from the return road. Vehicle may be towed from the 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.
14: RULES ADJUSTMENTS, MID SEASON LOG
Date: Adjustment:
None at this time.
NMRA SERIES 2007 RULES
Preliminary Version 1.1
Class Overview
Drag Radial is designed for small block single power adder 1979 and newer Ford Fox bodied and Ford powered vehicles using street-type D.O.T. radial tires. Drag Radial entries are limited to 302, 351 and 4.6L/5.4L modular engine types. All engine types are permitted a maximum of 440 cubic inches. Drag Radial class will be held at all NMRA events in 2007.
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 2006 accepted lists only up until January 1, 2007. After this date, NMRA will consider manufacturer requests for new products for the 2008 season.
Weight Breaks:
POWER ADDER BASE CI WEIGHT
Turbocharged – 82mm 360 2925
Turbocharged – 85mm 360 3125
Turbocharged – 88mm 360 3375
Supercharged 360 3100
Supercharged (X-TRIM, F1R, F1C) 360 3300
Nitrous Oxide 360 2600
Nitrous Oxide 415 2800
Nitrous Oxide 440 2950
Maximum cubic inch – 440.
Forced Induction entries without intercooler may deduct 200 lbs from vehicle weight.
Modular-equipped entries may deduct 150 lbs from vehicle weight.
Nitrous entries using non-Victor or TFS “R” heads may deduct 150 lbs.
Note: 10 lbs/cu in penalty applies for cubic inches over base weight break.
Note: All weights are with driver & rounded down to the five pound increment. Ex: A calculated weight of 2968 would be required to weight 2965 with driver at scales.
Class Rules, DRAG RADIAL
1: ENGINE
1.1 COOLING SYSTEM
RADIATOR: Maximum of two OEM production-style or aftermarket radiators is required and must be mounted in front of engine. Stock radiator core support is required.
Water pump: Any permitted.
COOLING FANS: Any permitted.
1.2 Engine
ENGINE: Engine limited to 302, 351, and 4.6L/5.4L modular engine types. Any accepted engine combination permitted in any accepted body style. Engine swapping permitted during event.
1.2a) ENGINE DRIVE BELT SYSTEM: Any permitted.
1.3 Exhaust
EXHAUST: All entries allowed to use tubular headers. Adapter plates permitted to bolt headers to cylinder head. 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. Mufflers are not required on wastegate outlets.1.3a) HEADERS & COLLECTORS: Any headers and/or collectors permitted.
1.3b) EXHAUST TUBING/SIZE: Any tubing size permitted.
1.3c) TAILPIPE & EXHAUST RULES: Full exhaust not required.
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.
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 outside driver’s compartment and inside body lines. 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 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. NMRA allows no greater reading than a “0” on the fuel-check meter. Failure to pass fuel check is grounds for disallowance of the run during qualifying and disqualification from the event during eliminations.
1.6a) SPEC FUEL: Not required.
1.9 NITROUS OXIDE
NITROUS OXIDE: Any NMRA accepted single or multiple nitrous system permitted. A maximum of 3 stages is allowed. The use of agents other than nitrous oxide as part of, or mixed in, the system are prohibited. Nitrous oxide may not be used in conjunction with any other power adder. If entry is entered as a non-nitrous entry, all solenoids, lines, fittings, and bottles must be removed prior to technical inspection and any competition runs. Nitrous oxide systems must use gasoline only for the fuel enrichment circuit.
1.9a) NITROUS PUSH SYSTEMS
PUSH REGULATIONS: Push systems are permitted. Push systems may only use air as a propellant. Air cylinders must be D.O.T. approved and rated for vehicle transport. Air cylinders must be securely fastened in the vehicle in accordance with NHRA & IHRA safety regulations. All other components of the system must comply with applicable NHRA regulations.
PURGE: Nitrous purge systems permitted. 1.10 OIL SYSTEM
OILING SYSTEM: Wet sump oiling system required. Dry sump oiling system prohibited. External oil pumps permitted. Any vacuum pump and/or evacuator system permitted. Any oil pan permitted.
1.12 SUPERCHARGER
Multi-staged supercharged induction systems are prohibited.
ROOTS TYPE SUPERCHARGER: Prohibited.
SINGLE CENTRIFUGAL SUPERCHARGER: Only centrifugal superchargers are permitted in Drag Radial. Allowed superchargers are restricted to NMRA accepted, commercially available, standard mass production style supercharger units. Internal of supercharger units (gearing, impeller, drive train) etc. may not be modified in any area. Supercharger compressor wheel must be constructed of cast or billet aluminum and must be NMRA accepted for the specified supercharger unit. Exotic material wheels prohibited. Pushrod-based engines must use standard rotation (non-reverse) supercharger, with supercharger inlet mounted rearward facing. Modular-based engine may use reverse rotation supercharger.
1.12a) PULLEYS/BELTS: Cog belt drive or serpentine-drive belt systems required.
1.12b) PERMITTED MODELS:The following makes and models of superchargers are the only units permitted. If your supercharger is not on this list, it is prohibited.
Vortech – A,B,S,Y,R,J,JT,T,YS,V7-Ysi, V27-Ysi, & X-trim, V24-X-trim models
Procharger – D1,D1X,D1R,F1,F1C-5.0, F1R models
Paxton Novi 1000, 1200, 2000 models
Powerdyne BD-9;BD-10;BD-11;XB-1A
1.12c) GEAR RATIOS: Internal gear ratios may not be altered from stock.
PERMITTED GEAR RATIOS:
Vortech - A,B,S,Y,R,J,JT,T,YS, YSi & X trim models 3.45:1 or 3.60:1
Vortech – V24 X, V27-Ysi 4.25:1
ATI Procharger D1,D1X,D1R 4.44:1
ATI Procharger F1,F1R, F1C-5.0 5.00:1
Paxton Novi 1000,1200,2000 3.45, 3.54, 3.50:1, 3.60:1
Powerdyne BD-9;BD-10;BD-11;XB-1A
1.12d) COMPRESSOR WHEELS: Supercharger compressor wheel must be constructed of cast or billet aluminum and must be NMRA accepted for the specified supercharger unit. Exotic material wheels prohibited.
1.15 BLOCK
Block: Any cast iron Ford type 302/351 permitted. Any cast iron or cast aluminum 4.6/5.4 based engine block permitted. Block must maintain Ford O.E.M. bore spacing, Ford O.E.M. deck heights, and Ford O.E.M. crankshaft spacing. 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 and solid engine mounts permitted.
1.17 CYLINDER HEADS
GENERAL GUIDELINES:
302/351 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.4.6/5.4 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: 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. Internal port areas of Non-Victor and Non-TFS”R” cylinder heads may be welded or epoxied. Victor and TFS ”R” heads may not be welded or epoxied. All heads must maintain standard “as produced” valve layout design, valve cant, etc. (no fabricating a canted valve design from an inline head, etc.)
1.17b) HEADS, MASS PRODUCED: Only mass produced, commercially available, NMRA accepted, cast aluminum or cast iron small 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: Permitted for Non-Victor and Non-TFS”R” heads only. Prohibited for Victor or TFS “R” heads.
1.17f) HEADS, VALVES: Any valve permitted. Bronze lined or replacement guides permitted.
1.17g) HEADS, MILLING: No regulations limiting milling.
1.17h) HEADS, PUSHROD SLEEVES: Permitted.For Victor and/or TFS “R” entries, pushrod sleeves are permitted, however the use of welding or epoxy to secure sleeves prohibited.
1.17i) HEADS, COMBUSTION CHAMBER VOLUME: No regulations limiting combustion chamber volume.
1.17j) HEADS, PORT PLATES/ADAPTER PLATES: Intake port plates prohibited, exhaust port plates maximum thickness ½” 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.
§ Ford OEM 289/302/351/5.0 Windsor & OEM 4.6/5.4L
§ FRPP GT-40/GT-40P/GT-40X/GT-40Y, N351, J302 & Z304
§ FRPP 4.6 2V & 4V Cylinder Heads
§ Edelbrock Performer & Performer RPM PN# 60329, 60359, 60279,60229, 60259, 60269
§ Edelbrock Victor Jr. A/C and CNC PN# 77169, 77179,77189,77389,77399,61269,61279,61309
§ Edelbrock Victor A/C & CNC & Glidden PN# 77219,77289, 77299,77099, 61099, 61299, – Nitrous Applications Only
§ Trick Flow Twisted Wedge (Non-R) and Track Heat Heads
§ Trick Flow Specialties “Street Heat”
§ Trick Flow Specialties Twisted Wedge “R” Cylinder Heads – Nitrous Applications Only
§ Brodix ST 5.0 Aluminum Cylinder Heads, PN# ST 5.0, ST 5.0R
§ Brodix Track 1, T1X
§ Holley 5.0 Aluminum Cylinder Heads, PN# 300-573, 574, 575, 576, 577, 578, 579
§ World Products Roush 180, Windsor Jr, PN# 53030, 23030
§ World Products Roush 200, Windsor Sr, PN# 53040
§ Dart Pro 1 A/C & CNC 170cc, 195cc, 210cc, 225cc
§ Air Flow Research 165, 185, 205, 225
§ Canfield PN# 18-350, 20-450, 20-475
§ RHS 180cc, 200cc & 215cc (Iron & Alum)
Note: Stock factory OEM heads are those cylinder heads that are factory production line installed on production vehicles as recognized by NHRA.
1.17m) INTAKE PORT LOCATION: Bottom of intake port may not be greater (farther) than .960” from head mounting surface. Purposeful erratic machining of the port floor to bypass this rule is prohibited.
1.17n) INTAKE PORT HEIGHT: Maximum port height is 2.40” as measured at intake manifold mounting surface.
1.18 VALVETRAIN
1.18a) CAMSHAFT: Any permitted.
1.18b) LIFTERS: Any permitted.
1.18c) LIFTER BORES: Lifter bores permitted to be bushed.
1.18d) VALVE LOCK: Any permitted.
1.18e) RETAINERS: Any permitted.
1.18f) ROCKER ARMS: Any permitted.
1.18g) CAMSHAFT DRIVE SYSTEM: Any permitted.
1.18h) REV KITS: Any permitted.
1.18j) PUSHRODS: Steel is only accepted material. Composite pushrods prohibited.
1.19 CARBURETORS
CARBURETORS: Entries restricted to 4150 or 4500-style single carburetor. Split carburetor prohibited (example: a Dominator, split and offset into two two-barrels). Standard-style or annular boosters are accepted.
1.20 FUEL INJECTION
Fuel Injection: Fuel injection must be electronic. Only mass produced, commercially available throttle bodies permitted. Single throttle body permitted up to a maximum of 90mm in any location.
1.20a) MASS AIR SIZE & TYPE PERMITTED: Any permitted.
1.20b) FUEL INJECTOR SIZES & TYPES: Any size/type fuel injector permitted. Maximum of 8 fuel injectors located in stock location.
1.21 INTAKE MANIFOLD
INTAKE MANIFOLD: Cast aluminum, carburetor type and EFI style, intake manifolds with a common plenum required for all combinations. Intake manifold must be commercially available and mass-produced. Porting, welding, or epoxy permitted on interior of intake only. Porting, welding, or epoxy prohibited on exterior of intake, with the sole exception of welding/epoxy on nitrous/fuel injector bungs and EFI-style lower intakes, which may have minor epoxy/weld added to the exterior of the intake runners only. Carburetor spacers limited to a maximum thickness of 3.200-inch, including gaskets. Tunnel rams of all types prohibited. Sheet-metal/fabricated intakes are prohibited, with the exception of sheet-metal, or carbon fiber upper, intake manifolds only for EFI applications, which are permitted. The Reichard Racing 4.6L 2 valve sheet metal Intake Manifold is accepted for use for EFI 4.6L 2 valve Use Only
1.22 SOLENOIDS
SOLENOIDS: Number of solenoids not restricted.
1.23 TURBOCHARGERS
Only one turbocharger permitted.
SINGLE TURBOCHARGER: Accepted single turbochargers are permitted with the following requirements: Turbocharger must be of conventional impeller and housing design and type. Turbocharger is limited to a choice of three turbochargers (at three weight breaks):
[a] maximum size of 82.0 mm/3.228” - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. Inlet housing is permitted a maximum inlet diameter of 3.308”where the leading edge of the compressor wheel meets the housing.
maximum size of 85.0 mm/3.346” - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. Inlet housing is permitted a maximum inlet diameter of 3.426”where the leading edge of the compressor wheel meets the housing.
[c] maximum size of 88.0 mm/3.464” - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. Inlet housing is permitted a maximum inlet diameter of 3.544”where the leading edge of the compressor wheel meets the housing.
Compressor wheel to housing clearance must maintain a maximum of 0.080” clearance beginning from a) where the leading edge of the compressor wheel meets the inlet of the compressor housing to b) the transition point where the trailing edge of the compressor wheel meets the volute. All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas, or any other substance into the inlet or exhaust housing prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited. The tips of the impeller wheel may not be stepped, cut down, or notched to meet impeller tip-to-tip dimension. (.500-inch will define the tip of the impeller wheel).
1.24 AFTERCOOLER/INTERCOOLER
AFTERCOOLER/INTERCOOLER: One and only one aftercooler/intercooler permitted only on forced induction entries. Air-to-air or air-to-water/ice are the only systems permitted. Water and/or ice are the only components permitted in the reservoir.
1.24a) AFTERCOOLER/INTERCOOLER LOCATION: There are no restrictions as to location of aftercooler/intercooler.
1.25 POWER ADDERS
POWER ADDERS: Any single power adder (nitrous oxide, supercharger, turbocharger) permitted with engine combination. See sections 1.9, 1.12, & 1.23.
Water injection is prohibited.
1.26 CRANKSHAFT
CRANKSHAFT: Cast iron or steel crankshaft required. Composite and/or multi-piece crankshafts prohibited.
1.27 CONNECTING RODS
CONNECTING RODS: Any steel, aluminum, or titanium connecting rods required. Composite Connecting rods prohibited.
1.28 HEAD GASKETS & QUENCH AREA
HEAD GASKETS & QUENCH AREA: No restrictions.
1.29 PISTONS, PINS, RINGS
PISTONS, PINS, RINGS: Any piston, pin, ring combination permitted.
1.30 BOOST CONTROLLERS
BOOST CONTROLLERS: Electronic or automated boost controllers permitted on turbocharged applications only. Boost controller, whether electronic or manual, must be a stand alone device and may not be incorporated into any traction control system (or engine control feedback loop) of any type. Blow-off valve, regulators, and associated tubing and hardware must be contained within the engine compartment. C02 bottles utilized to control waste gate functions may be contained within interior.
1.31 WASTEGATE & PRESSURE REGULATOR
WASTEGATE & PRESSURE REGULATOR: Any permitted. Mufflers are not required on wastegate outlets.BOOST BYPASS/BLOW OFF VALVES: All boost bypass valves & blow-off valves must be contained entirely in the engine compartment.
1.32 VISIBLE COATINGS
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 permitted.
1.33 “O” Ringing of block
“O” Ringing of Block: Permitted.
2: Drivetrain
2.3 CLUTCH
CLUTCH: Prohibited.
2.4 DRIVESHAFT
Driveshaft: Any permitted.
2.11 REAREND
REAREND: Any automotive type rearend permitted.
2.12 MANUAL TRANSMISSIONS
MANUAL TRANSMISSION: Prohibited.
2.13 PURPOSE BUILT TRANSMISSIONS
PURPOSE BUILT TRANSMISSIONS: Prohibited.
2.14 AUTOMATIC TRANSMISSIONS
[B](OEM American transmissions or replicas of OEM American transmissions that use planetary gears)
AUTOMATIC TRANSMISSIONS: Any OEM American automatic transmission or a replica of an OEM American automatic transmission that uses planetary gears and torque converter permitted. Transmission-to-engine adapters are permitted. Lock-up transmissions/torque converters permitted only in transmissions that came OEM-equipped (ex: AOD, AOD-E). Trans brakes permitted. Automatic transmission entries run at listed base weights. Pneumatic, electric, hydraulic, etc. shifters prohibited. Any gear change must occur as a result of an internal function of the transmission or from direct action by the driver. Clutch not permitted with this type of transmission.
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: Manual or power assisted 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 following: 1) roll bar or roll cage may be welded to the strut towers for safety purposes 2) clearancing of strut tower permitted for supercharger tubing.
3.4c) CONTROL ARMS: OEM or tubular stock type control arms required which are attached in stock location.
3.4d) SHOCKS/STRUTS: O.E.M. or aftermarket style shocks/struts & springs required in stock location. Shocks must be stand alone and may not be adjustable during run via any means.
3.4e) SPRINGS: Aftermarket springs permitted.
3.4f) COIL OVERS: Coil over shocks and struts permitted. Stock 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 (maximum 2.00-inch), 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 Racecraft, Anthony Jones Engineering, Strange, & Santhuff.
3.4 SUSPENSION, REAR
REAR SUSPENSION: Stock type suspension required. Rear coil-over shocks permitted.
Stock Type Suspension: Stock type suspension may utilize aftermarket, direct replacement type suspension components including aftermarket replacement shocks, springs, and/or control arms. All stock type 3-link and 4 link suspensions must maintain stock lateral angles and attachment points, but may be moved up or down on rear axle. Aftermarket torque arms and coil-overs 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 upper and lower control arms and permitted. Control arms may use any type bushing, bearing, or rod end. Control arms may be adjustable to any length.
3.4d) PANHARD BARS: Permitted. Panhard bars must be located aft of rearend housing. 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: Any permitted, including coil over shocks and springs. Shocks must be stand alone and may not be adjustable during run via any means.
3.4h) TRACTION BARS: Bolt on traction bars 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: All wheelie bars must have a non-metallic wheel. Wheels must turn freely at starting line. Wheel preload is prohibited. Using the wheelie bar as a “fifth wheel” sensing device is prohibited. Hydraulic, pneumatic, electronic, etc. or any other adjustment or movement during run is prohibited.
4:FRAME
4.4 FRAME
FRAME: Stock, unaltered frame rails required in front subframe. 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. Stock rear subframes are required, but outer frame rail portion only may be notched for tire clearance only. When notching, stock inboard section of rear frame rails must remain stock, unaltered, and in stock location. Rear frame rail must remain in OEM stock condition in all areas. Notching (vertically) for rearend clearance permitted only on 2005-07 Ford Mustang rear frame rails, which may be notched a maximum of 2-inches vertically for rear end housing clearance only. The upper part of the rail must remain intact. Complete rear frame must be visible for tech purposes.
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: Accepted street-type D.O.T. Radial tires are required. Drag radial tires must be suitable and designed for street use. Tire tread may not extend outside fenders. Tire shaving is prohibited. The following sidewall designation D.O.T. drag radial tires are the only designations permitted: 275/50; 275/60; 325/50. The following sidewall designations are prohibited: 315/60; 295/65. Slicks & wrinkle wall tires are prohibited.
5.1a) Permitted street-type D.O.T. radial tire list:
· BFGoodrich Comp T/A Drag Radial
· BFGoodrich G-force T/A Drag Radial
· Nitto NT555R Drag Radials
· Also accepted: any approved radial-construction tire with a D.O.T. tread wear rating of 180 or greater that fits all other criteria and sizing.
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: Aftermarket steering column permitted. 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 Fox based and 2005 to present Mustang Ford body styles permitted. Lightweight body parts are restricted to hood and trunk-lid/hatch/deck-lid. Hood and/or trunk lid must be hinged or lift off. Funny car bodies 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 does not need to 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.
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 and shifter clearance, required from firewall to back bumper. Flat area of floor-pan after “kickup” for rear end (behind rear seat area) and rearward may be replaced with a minimum of .024” inch thick steel or .032” inch aluminum. Magnesium is prohibited. Transmission tunnel must remain stock & unaltered. Removable floor-pan sections and/or transmission tunnels prohibited.
7.7 HOOD/SCOOP
Hood/Scoop: Lightweight cowl induction-style hood permitted. Forward mounted scoops prohibited. OEM forward mounted scoop must be closed during competition. The entire induction system must be completely covered by hood, which must be part of the vehicle hood. Hood must be attached separately in a conventional manner and must lift off or be bolt on.
7.9 WINDSHIELDS/WINDOWS
Windows: O.E.M. safety glass required. Driver and passenger windows must be closed during racing. Windows do not have to 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: Aftermarket wheel tubs permitted. Material used to add to the width of the inner wheelwell may be steel, aluminum, fiberglass, or carbon fiber.
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
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: Accepted, commercially available body kits permitted. Filling in the lower valance permitted if completed in a permanent manner (taping not permitted).
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. May not be one-piece front end. Filled-in lower valance, permitted. Hole(s) in front bumper for the purpose of air induction prohibited.
8: Electrical
8.1 BATTERY/CHARGING SYSTEM
BATTERY: Battery may be relocated. Charging systems optional.
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: Onboard diagnostics and data recorders used to monitor and record parameters such as a driveshaft speed, acceleration, nitrous timing, chassis strain, suspension travel etc., permitted. Wide band oxygen sensors permitted. “Playback” tachometers permitted (i.e. Autometer Dual Channel Ultimate II tachometers, and the use of its features). Laptops permitted in vehicle.
9.7 BOTTLES
BOTTLES: All bottles must be securely mounted, stamped with a minimum DOT–1800lb. rating, and identified as nitrous oxide. Bottle located in driver’s compartment must be equipped with the correct relief valve per manufacturer recommendations and vented outside the driver’s compartment. The use of any agents other than nitrous oxide as a part of, or mixed with, this pressurized fuel system is strictly prohibited. (Push systems are prohibited.) Commercially available, thermostatically controlled, blanket type bottle heaters are acceptable. Any other method of heating bottles in vehicle is prohibited.
9.8 TOW VEHICLES
TOW VEHICLES: Vehicles may not be towed in or to staging lanes. Vehicles may not be towed from the return road. Vehicle may be towed from the 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.
14: RULES ADJUSTMENTS, MID SEASON LOG
Date: Adjustment:
None at this time.