bhp vs. whp [Archive] - SaabCentral Forums

: bhp vs. whp


Guteman
10th April 2006, 08:45 PM
I just noticed that Saabs lose ALOT of horsepower between the crank and the wheels. Where is this power lost? Can someone explain this, and possibly a correction so whp is very close to bhp ratings.

its_tricky83
10th April 2006, 08:52 PM
I actually thought the opposite, when compared to Rear Wheel Drive's. Front Wheel Drive's should loose a fair bit less than Rear Wheel Drives.

We have been discussing this in another post.
600hp 9000 (http://www.saabcentral.com/forums/showthread.php?t=72322)

FirstTimeSaab
11th April 2006, 03:06 AM
BHP and WHP IMO are the same
BHP - Brake horse power
WHP - Horse Power

When people say HP without any else attached I go with what the engine makes at the crank

ragtopcav
11th April 2006, 06:47 AM
When you have your car measured for power on the dynometer, the only number that really counts is the break horse power at the wheels, there are methods to calculate the flywheel power from this, but measuring the wind-down alone can be widely innacurate as the effect of the gear ratio is not taken into account on that. The power outputs quoted by manufacturers are almost always at the flywheel; measured on engine testing dyno's with no powertrain attached.