HP or TQ

[GT40FIED]

Originally posted by ChrisCantSkate
i thought hp was (tq*rpm)/5252. the PLAN dosnt take some other factors into consideration that should also effect an engines hp output.

Yeah...the general equation is (tq*rpm)/5252. But to figure that you first have to know how much torque you're making. PLAN is usually used in factory settings where everything is more or less the same and you don't need to factor in things like valve size, shrouding, etc. It does *sort* of cover that...as things of that nature will usual effect working cylinder pressure. But it's just sort of a baseline equation.