The above link is now dead... So if it was covered in the article, please forgive me...

I have been involved in a discussion with a few Americans. They claim that our dynos are out of whack... Based on: a 400Hp@crank engine making 300Hp@wheels, would be dissapatting 100Hp(75Kw or 750x 100W light bulbs!) of energy thru the gearbox. As energy cannot be created nor destroyed, where the hell is our power actually going? 75Kw of Heat and friction is rather unsettling...

I believe the 25% drivetrain loss figure to be accurate, as stated by DD in post #2. But when actually presented to me in that way, it is down right disturbing!

I can link the discussion if required...