Quote:
Originally Posted by enkeivette
Motorgen.com is a better source for info, don't go anywhere.
HP is a mathematical calculation from measured torque, which is actually what a dyno measures. It always crosses at about 5250 because of the math equation.
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Uhh, 5250 is used in the equation, not because of the math equation. And to be extra annoying, it's actually 5252, derived thusly.
The constant 5252 comes from (33,000 ft·lbf/min)/(2π rad./rev.).
NOTE: The 33,000 ft.lbf/min. is the definition of one HP. Why it's divided by 2π rad./rev. I don't recall. But that's the constant you use.
HP = T[ft.lbf.] x RPM/5252