Carb CFM recommendations

thecatsfan said
Yeah, I see what you are saying. I understand the math is sketchy to a point. But overcarbed is overcarbed. I bult many small blocks back in the 80s and they all ran at their best with carbs well under 700 cfm. I had a 327 in a Chevelle with 202 heads that put out almost 350hp with a Carter Comp AFB 625 and it ran really strong. Not saying you are wrong. You make some good points. Just hard to kill old habits. And I have seen so many people flood cars with oversized carbs.

Carbs aren't superchargers or forced induction. They do not FORCE anything into an engine. IF your engine will only pull 440 cfms, then that's all a 750 cfm carb will flow on THAT particular engine. Factory thermoquad on a 318 was 800 cfm's, and that was with single exhaust.