Originally posted by Ives Bradley
Well according to my info, take the engine size say 460XMax rpm say5000XVolumetric efficiency divided by 3456= CFM. So460X5000=2300000X.85[most rebuilt engines have about 85% efficiency]=1955000 dividedby 3456=565.68287, or less than 600 CFM. This is only a place to start for some, but it has worked real well for me like it is.
You just made my head hurt.

Originally posted by techinspector1
I like Denny's formula....cubic inches times 2.
That's what I'm talking about...