Originally Posted by GODSCOUNTRY340
Cubic Feet Per Minute (CFM) is the same whether it's a 2bbl or 4bbl, that's what the carb flows. It makes no difference if it's a 2bbl or 4bbl, the CFM is what that carb delivers. There's no difference in the 2bbl or 4bbl rating.


The 2bbl carbs are measured at a different inlet depression than a 4bbl carb. They also have changed wet vs. dry flow over the years.

https://www.thecarburetorshop.com/Carbshop_carbsizesandCFM.htm

'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118