Quote:
Originally Posted by Dave-ROR
The rest is lost through the driveline. It takes power to spin all those parts. Do some reading on "Brake Horsepower" and "Wheel Horsepower" on google.
|
^ This. Frictional horsepower is the reason a vehicle loses a percentage (not an exact figure) of the horsepower produced at the crankshaft on it's way to the wheels. What is frictional horsepower? It's power dissipated as a result of driven components (I.E. pulley's, propeller shaft, transmission, transfer box for AWD vehicles, differential, camshafts, axles etc..).
But just to add on, you can reduce parasitic driveline loss (the term used to describe horsepower lost as a result of frictional horsepower) by either deleting certain driven components (AC compressor pulley, power steering pulley) or reducing/increasing the size of certain pulley's (Increase in AC compressor, power steering and alternator pulley size. Decrease in crankshaft pulley size.).