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Old 03-12-2012, 01:36 PM   #7 (permalink)
Spikuh
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Quote:
Originally Posted by pty370z View Post
I have one question.. Why are they multiplying the WHP by 1.25 to estimate the crank HP?
Isn't the drivetrain loss in manual Z's estimated at around 17%-18%..?? I think 25% is a bit high..
This is pretty much my next question. Why 1.25? Where are they getting it from?

Instead of:

Quote:
292 (Wheel HP) x 1.25 = 365 at the flywheel.
230 (Wheel TQ) x 1.25 = 288 at the flywheel.
Shouldn't it be:

292whp x 1.20 = ~350hp
230wtq x 1.20 = ~276tq

Then using that 1.20 to finish out, their final numbers would be:

340whp x 1.20 = 408hp
260wtq x 1.20 = 312tq

Is this the wrong approach?
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