:wack:
1 cfm = 2 h.p. ??? never heard that one! if my heads flow 352 @ .600 , w/ a .600 lift cam(after lash) your telling me that I got 704 h.p. ?? like to hear rrr take on this. you out there rusty?
Like Moper said. Just because you have a cylinder head flowing 300cfm @ .600 doesn't automaticaly mean your making 600 hp. The quality of the bud is for starters. Second would be the combonation of parts used. A dual plane is giving up power to a single plane, which is giving up power to a tunnel ram, which all of these intakes need the right parts below it to show there abilty.
One could use a tunnel ram on the street and make a very modest amount of power. IE; 400hp in a 360. But the intake has the abilty to make triple that if the combo is right. Even if there is a set of fully ported heads under it. Low compression and mild cam's, small displacements and headers all lead to lower power levels.
In general, A stout high performance build can use the formula as a basis to get a idea. But if your limited or at a less than optimal level when the engine is built, power output will be lower. Things like not taking advantage of the heads flow abilty with a cam not lifting the valve enough. Cam duration has a huge roll as well. Etc. right on down the line for every part in, on and around the engine.
