fat_zilla

anyone know the actual power loss through the AWD trans?

trev555

I had my completely standard Evo dynoed recently and it recorded 125.5kw at the wheels. Since they are quoted as having 206kw, that would make it about a 40% loss.

Unless of course I've got a problem I don't know about.

fat_zilla

i think you have a problem... here in the states the wrx has 227hp at the wheels and its only susposed to have a 24% loss... just a rumor, but 40% is way to much of a loss. im not sure about the evo's in au though.

Lan Evo

trev555's EVO engine might not be performing at its 100% capacity. That might due to age, gas, condition of the engine and the car (wear in drivetrain parts might cause a problem too).

Most AWD car will lose approx 25-35% of power as far as I read in the past

HobieKopek

iTrader: (8)

Yeah, I've read to approximate a 35% drivetrain loss for AWD cars. Of course that's just from reading...no personal experience or formulas to back it up.

broeli

iTrader: (19)

From experience, drivetrain loss isn't more than 25%.

HobieKopek

iTrader: (8)

Does any one company/manuf. claim to have a more efficient AWD system than another?

If someone could make an AWD drivetrain with less loss and a powerful engine to put in front of it then they'd have a nice little thing going for em.

On a related note, what's approx drivetrain loss for RWD? I've been told to expect 10-12% on FWD and heard RWD was slightly less efficient but never seen any ballpark numbers.

fat_zilla

FWD is better than RWD in the powerloss just because it doesnt have to be converted in the axle its just right there, but i think its only 12% FWD is less than 10%.