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      06-25-2008, 07:52 AM   #62
Dr_Dirt
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Drives: E90 335i 6AT
Join Date: Apr 2007
Location: DFW

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Quote:
Originally Posted by mistermojorizin View Post
335whp = 368 crank hp at 8.9% drivetrain loss.

to check my math 368 crank - 0.089 * 368 = 335 at the wheel (i rounded by 3/10th of a hp).

quick way to do it is 335 wheel /.9 = 368 crank.
at the outset it looks like thats the way to apply the math but in reality you need to invert the 8.9% 1/.089 = 1.122 to convert up from whp to bhp.

When converting up from whp to bhp use the bhp = (whp * 1.122)
When converting down from bhp to whp use the whp = (bhp * 0.089)
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