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Old 11-29-2012, 02:42 AM
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Bönz Bönz is offline
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Location: Michigan
Join Date: Jun 2012
Posts: 641
Mein Auto: 2015 M5
Originally Posted by ShakeDaddy View Post
Agree the BMW engines are factory under-rated but no way a stock 2012 engine is over-rated by BMW 100+ HP.

With your 405 WHP Pre Stage III we are looking at 510 HP at the crank/engine with a modest 20% drive train loss.

Also where did you get that first 328 WHP Pre-Stage III number?
I agree SD. The graphs are actually labeled "eng torque" and "eng HP" if you look close. I assumed the dyno shop is using some kind of algorithm to convert. I would suggest, however, that 20% loss is high for these cars, even at peak. But your point is valid.

405 and 457 do sound like realistic crank HP numbers pre and post Dinan.
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