So I just ran the class final at Indy.......

[Bob Shaw]

You definitely should not be tossed, but I'm guessing that you would be. Both can not be right and his is correct according to NHRA specs. I may be wrong. I usually am. Maybe they would not disqualify either of you.

[Keith 944]

He has more $ than you and Regularly takes the tech officials out for dinner and drinks sorry Billy your tossed

[gmonde]

so is this a actual situation that happened or just a hypothetical ?

[Billy Nees]

Originally Posted by gmonde

so is this a actual situation that happened or just a hypothetical ?

To answer your question Garrett, no that exact scenario has never happened to my knowledge. BUT, a close acquaintance of mine was at a Divisional race a couple of years ago and was "spot" checked. The Tech Man wanted to see his carb and he complied. The carb on his combo was the ONLY number listed for his combo and (in fact) was the original carb for the car. Tech Man measures carb, carb comes up WAY (WAY WAY) too small, Tech Man wants to know why his carb is so small. When acquaintance tells Tech Man that it is the original and correct carb, the Tech Man doesn't toss him but tells him not to come to another race with THAT carb on the car.

Now, sorry for getting long-winded but the reason I wrote this is I was having a conversation with another acquaintance of mine yesterday and one of MY combos came up. Now, said combo will run MUCH better with a smaller carb on it but the original, correct numbers carb (I have it) is a big carb. The problem is that the NHRA throttle bore and venturi spec are for the small carb.
Do I run the "correct" carb or do I run the "in-correct" carb with the smaller specs? If I use the "correct" # carb, I take the chance of being tossed for too big a carb. If I run the "correct" spec carb, I take the chance of being tossed for too small a carb. In a situation where the guide contradicts itself, I really am not sure just how the chips might fall.

Now when you're thinking of the correct answer remember, I'm the guy who was tossed at Indy once because my heads looked "too stock".

[Bob Shaw]

Billy, I don't see how you could have a problem if your carb meets NHRA specs. But you really should be discussing this with NHRA.

[gmonde]

[QUOTE=Billy Nees;604497]To answer your question Garrett, no that exact scenario has never happened to my knowledge. BUT, a close acquaintance of mine was at a Divisional race a couple of years ago and was "spot" checked. The Tech Man wanted to see his carb and he complied. The carb on his combo was the ONLY number listed for his combo and (in fact) was the original carb for the car. Tech Man measures carb, carb comes up WAY (WAY WAY) too small, Tech Man wants to know why his carb is so small. When acquaintance tells Tech Man that it is the original and correct carb, the Tech Man doesn't toss him but tells him not to come to another race with THAT carb on the car.

Now, sorry for getting long-winded but the reason I wrote this is I was having a conversation with another acquaintance of mine yesterday and one of MY combos came up. Now, said combo will run MUCH better with a smaller carb on it but the original, correct numbers carb (I have it) is a big carb. The problem is that the NHRA throttle bore and venturi spec are for the small carb.
Do I run the "correct" carb or do I run the "in-correct" carb with the smaller specs? If I use the "correct" # carb, I take the chance of being tossed for too big a carb. If I run the "correct" spec carb, I take the chance of being tossed for too small a carb. In a situation where the guide contradicts itself, I really am not sure just how the chips might fall.

Now when you're thinking of the correct answer remember, I'm the guy who was tossed at Indy once because my heads looked "too stock".[/QUOTE

run the carb that the spec calls for in the nhra specifications guide ,, if you have information that can prove the correct carb along with throttle bore and venturi ,contact nhra tech official and plead your case
have both carbs on hand at your next divisional race and let them decide


I also haven't seen any +/- spec on carb bores or venturi's

[Larry Hill]

"Too Stock" ...................

[MikeMoller]

I was under the impression that NHRA tech really doesn't pay that much attention to carb numbers anymore, just the specs. To easy to change on some carbs. If you have an original carb that doesn.t match specs I guess you would have to plead a case with NHRA to get spec changed. Wouldn't plead a case if the wrong spec helps me though! Merry Christmas!

[Tom Meyer]

I think you are try to slow your car down so you don,t get HP. But how big is big and how small is small.I once torn down down by Wayne Lewis and was told my carb was to small, that all that was said. You do not have a problem if your camber cc are to big or your runners are to small. Merry Christmas To all. Tom

[Bench Racer]

I would think if your if your Stocker had unaltered intake or exhaust runners that CC'ed less than spec., or combustion chambers that CC'ed larger than spec it's obvious you are not grinding and bead blasting or using acid on your heads. I would also think if your carb had the right unaltered part number on it and measured smaller than spec. It left the factory that way. With either scenario IMHO it's obvious no one is trying to cheat. Correct me if I'm wrong but you are not required to run the factory lift on the camshaft in Stock, you just can't exceed it. If a Super Stock cylinder head guru finds out by putting epoxy and brass in the right places and making the runners smaller the car gets faster. If they hold less CC volume that spec. will the head get tossed. Just curious, Don Jackson