carb intakes ATTN: Thom Bates

[teddy]

Does this rule apply to all carb'd intakes, including the Sullivan?

Carbureted intakes may be ported only 1” into runners (from intake mounting face), otherwise, porting/machining is prohibited on carbureted intakes.

[GeneHindman]

Does this rule apply to all carb'd intakes, including the Sullivan?

Carbureted intakes may be ported only 1” into runners (from intake mounting face), otherwise, porting/machining is prohibited on carbureted intakes.
There would also be an issue with the spacer for the EFI Sullivan. As the rules state, that the spacer can be any height but cannot create an "open plenum". Sounds like the EFI Sullivan will not be allowed a spacer at all, and I don't think it'll clear the Alternator without one. Unless they run the Wilson elbow and a Race Accufab throttle body facing towards the shock tower. That rule about the throttle body used to state "Any Commercially Available" for the modular. I'll have to check and see if it still does.

[GeneHindman]

Yup, just checked and the 4-Valve can use any size commercially available throttle body. WOW!

[D2KStang]

The rules allow the Sullivan EFI elbow to be ran but if it would not work without a spacer then it does no good to allow it. So the spacer on an EFI Sullivan would be considered to create an open plenum?

[vrtical]

Yup, just checked and the 4-Valve can use any size commercially available throttle body. WOW!

been that way for years. Soo I guess all those other spacers that have been used over the years on EFI 4v manifolds have been illegal. As far as the alternator being an issue, just move it.

[teddy]

been that way for years. Soo I guess all those other spacers that have been used over the years on EFI 4v manifolds have been illegal. As far as the alternator being an issue, just move it.
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.


According to this, yes, they have been illegal!? No open plenum spacers on efi engines(doesn't specify pushrod vs. modular) Maybe Thom will/can clarify these descrepencies!?

[RHecox]

According to my interpretation of the following rule the sullivan intake is exempt from the 1" porting into the runner rule. There is no ** listed next to the part number. So, which rule overrides which rule?

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
Sullivan Modular 4.6L 4V intake PN# 1-101A & 1-101B ++( Throttle body adaptor also permitted)
Professional Products 4.6L 2V Typhoon intake

** 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.
++ These manifolds are permitted with a 100# weight adder to base weight

I also interpret the efi rule as a spacer being illegal.

Good thing they write the rule book using GREY ink.

[D2KStang]

The Sullivan only has the two pluses beside it for adding 100 pounds not the stars for porting it.

[teddy]

Carbureted intakes may be ported only 1” into runners (from intake mounting face), otherwise, porting/machining is prohibited on carbureted intakes.


You are both correct, but there is this that is in the rules, so which one overrides the other?? I need to know before I have this intake done:eek: ;)

[Stephen Johnson]

Carbureted intakes may be ported only 1” into runners (from intake mounting face), otherwise, porting/machining is prohibited on carbureted intakes.


You are both correct, but there is this that is in the rules, so which one overrides the other?? I need to know before I have this intake done:eek: ;)


Is there a rule for height and width size on the heads (intake port) Brainstorming.........;)

[teddy]

I'm sure this has been looked at by a Tech official that could have anwsered it:rolleyes: Guess a clarification isn't warranted:rolleyes: Will it take a protest to get a clarification?????

[vrtical]

gotta get one to show up first.

[GeneHindman]

gotta get one to show up first.
Not really, it's too late then to address it.