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      12-04-2012, 03:18 AM   #15
SmartBastard
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Drives: '08 M Coupe
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Quote:
Originally Posted by GuidoK View Post
You cannot 'calculate' drivetrain loss.
You can only make an estimate.
What was the power measured at the wheels? (I see a lot of numbers with descriptions all in czech or something).
Only the measurement at the wheels has some meaning although different dyno's give different numbers (also due to different means of measurements). Rwhp is usually within 5-10% accurate.
It's possible to measure the drivetrain loss, that's exactly what that MAHA LPS3000 is doing. Problem with RWHP is that it depends on the conditions - temperature, pressure, air humidity etc, that's why there's "standard" conditions at which HP are stated. Depending on the actual conditions the dyno compensate for the difference to this standard and calculates what the engine BHP would be. Some dynos are better and some worse at this ofc.

To answer your question the RWHP was 255,8 or 188kW. The measured drivetrain loss was 96HP (metric) or 70kW.
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