Originally Posted by B1MAXX
Originally Posted by AndyF
Those numbers are the two barrel ratings. It isn't the same as a 4 bbl rating. It was a marketing gimmick to fool people into thinking they had 1350 cfm when they actually had a lot less.


not buying your comment on hp related cfm requirements. The size of the engine/rpm has a lot to do with it.

Your better off looking at venturi area as a better comparison.

And even if I cant add, I can see there is more holes of similar size than a 750.


Power comes from fuel so the amount of power produced is directly related to the amount of fuel consumed. 400 hp requires roughly 200 lbs of fuel per hour. The air fuel ratio in a street engine at WOT is around 13:1 so that gives you how many pounds of air you need. Once you know pounds of air you can convert to CFM. Engine size and RPM aren't required in the equation since the power comes from the fuel consumed.