is this right? (math involved)

[magnethead]

Originally Posted by SanitysBane

Well remember that your motor is a 4 stroke, intake, compression, power and exhaust. Acording to the back of my AFR book is gives this formula for cab size; Carb CFM required = (CID X Maximum RPM)/3456. So for a 454 times max RPM of 5000, is 2270000/3456 would equal 656.828 CFM. With your hypothetical MAX RPM of 3000(rounded) would be 454 X 3000 = 1362000/3456 = 394.097. So if all you want to do is run your engine at 3000RPM, at no load than go for it, and yes their are losses to take into acount as well. Also remember the more horsepower that you make, the more air you are going to need and vice versa. If you are thinking about putting on a smaller carb for better fuel millage than get a motorcycle.

lol i was just trying to figure out why i had a 650 (or a 750, haven't looked up the carb to see which version I have).

FYI, the redline for a stock 454 is 4200 RPM or some number around there