Carb size ?

Billy Nees · 10-09-2020, 05:18 PM

Quote:

Originally Posted by Jeff Stout

A max size carb per rules for each motor combo. I know we no longer need carb numbers to be correct per engine. Any rule on how small a Qjet you can have? Asking to try a small cfm if legal.

If you are still running the 307 roller combo, you must use an 800 CFM Q-Jet. Plus .005 or minus .015. Same carb that I have to use on my 301 Pontiac.
Just a bit of advice, don't listen to what some "previously employed by NHRA" people might have told you.

Jeff Stout · 10-09-2020, 08:31 PM

Quote:

Originally Posted by Billy Nees

If you are still running the 307 roller combo, you must use an 800 CFM Q-Jet. Plus .005 or minus .015. Same carb that I have to use on my 301 Pontiac.
Just a bit of advice, don't listen to what some "previously employed by NHRA" people might have told you.

Check your PM please

Mark Yacavone · 10-10-2020, 12:52 PM

Quote:

Originally Posted by Billy Nees

If you are still running the 307 roller combo, you must use an 800 CFM Q-Jet. Plus .005 or minus .015. Same carb that I have to use on my 301 Pontiac.
Just a bit of advice, don't listen to what some "previously employed by NHRA" people might have told you.

I did not know that. I know several guys who used a 207 carb in place of an 800 late model
I assumed the rule was kinda like .030 over, vs. .080 over.

How's that "no tech" working out, again?