Quote:
Originally Posted by Rock36
Lets take your car for a second. It started at 320 rwhp from a stock 400 bhp L99. If you do the math that is about a 20% loss. So to look at it another way, between the engine and the wheels, your drivetrain requires roughly 80 hp of work to spin the transmission, driveshaft, differential, axles, wheels etc. and this also includes losses due to friction.
So now you make 440 rwhp, and using 20% as a factor you might claim to make 550 bhp at the engine now with your mods. But that would mean your drivetrain (which is exactly the same as before) now suddenly requires 110 hp to do the same work it did before to spin the exact same drivetrain. That would imply your drivetrain actually became more inefficient even though the percentage of loss didn't change.
Similarly if you took a stock Mustang and put in a one-piece aluminum driveshaft over the two-piece, you would see some improvement in rwhp, but the engine is still untouched and is not suddenly stronger than before. But someone trying to back calculate engine hp based on a new rwhp number might think the engine is more powerful or underrated.
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so you dont think spinning it faster would have any effect on how much power it saps? I think a 500hp car would lose more power than a 400hp car using the same drivetrain, but not the same percentage.