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Discussion Starter · #1 ·
Thinking about putting some gt40p's, and some 4.10's, or 4.30's on my car so I can compete in factory stock, but unless I can run better then low 12's I dont think I can be competative.

Just curious if it is worth my time.
 

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Discussion Starter · #4 ·
I dont feel so bad with some gt40's I think I could be in the mid to low 12's


This class limits you to stock cast ford heads, ford intake, and stock botom end.

You also have to use stock k-member, and stock style suspension.

So you can run iron gt40's and cobra or gt40 intake.

Also forgot no porting alowed in intake or heads.
 

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bert89coupe said:
yes, i'd be interested in this answer also.


what exactly are the rules to this class??
Only factory parts allowed, cobra bits on BJ's car is fine. only shorty headers, no trick stuff like aluminum radiators or heads, cams not to be bigger than stock, etc.
 

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Discussion Starter · #7 ·
Jimbo said:
Only factory parts allowed, cobra bits on BJ's car is fine. only shorty headers, no trick stuff like aluminum radiators or heads, cams not to be bigger than stock, etc.
I was curious about the cam thing. i can run a differant cam, but it can only be 480 lift right?

just curious if anyone makes a factory stock specific cam.
 

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DarkPony said:
I was curious about the cam thing. i can run a differant cam, but it can only be 480 lift right?

just curious if anyone makes a factory stock specific cam.
480 is the limit, not sure about duration though. it has to be within spec rules, and i think they changed a while back. i think most of the guys run a stock cam so they dont have to worry about it. lol
 

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some are in the high 11's
 

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Discussion Starter · #14 ·
I have been looking at this rule, what is stock cc size on gt40p heads.

1.17i) HEADS, COMBUSTION CHAMBER VOLUME: Minimum combustion chamber volume for 302W heads is 58.0 cc’s
 

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Discussion Starter · #18 ·
here are the cam requirements. basicly a stock cam with 1.7's

5.0 Engines – .480” maximum valve lift (checked at retainer) and below specified lobe durations and lobe separation angles

Note: Lobe duration is checked at the below specified lobe lifts.

Lobe lift Maximum duration

.050” -- 211

.100” -- 179

.150” -- 148

.200” -- 115



Maximum lobe separation angle – 117 degrees, Minimum lobe separation angle – 115 degrees
 
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