[GeorgiaSnake]

42

My question is still unanswered. Take your car - install a 300 hp dyno tested motor in it - put it on the dynamic dyno and see what it delivers. My guess is a good bit less than the static dyno and for good reason - drive train friction. For arguments sake lets say it pulled 240 hp at the wheels which is a 20% loss due to the drive train. Now yank the motor and put in a 500 hp dyno tested motor - go back to the same dynamic dyno duplicate the pulls and compare the numbers. Unless I'm missing something here it should produce 440 hp (500 minus the 60 hp established in the first test) at the wheels not 400 hp as the 20% rule would dictate. Adding hp cannot increase the drive train friction beyond what is was before.
I really don't care about the numbers I just want my car to haul a$$, but this 20% rule seems to throw science out the window.

Randy