Quote:
Originally Posted by AMB
So how do you explain Automobile Mag's dyno results for the 335i? Like I mentioned on a post over at 1addicts... ( http://www.1addicts.com/forums/showthread.php?t=1180)
Are these guys just using the stock horsepower rating and assuming the drive train loss is whatever?  |
In my humble opinion most people are measuring the power and torque at the wheels and using a percentage losses to work out the stock crank numbers. This of course is making people to believe that actually numbers are overrated.
This methodology is wrong, because the frictional losses as a percentage of the stock numbers varies at various engine speed although the actual loss remains doesn't. Most engines above 2000 rpm will give you an approximately constant drive-train losses(approximately 10 ft.lbs variation in torque losses above 2000 rpm)