Converting RWKW to motor power?

[Bill]

Whats the generally accepted formula for converting RWKW to flywheel KW?

My pride and joy did 204.1 kW.

[Raging Demon]

From flywheel to rearwheel power, its loses around 25-30% of power. So from the wheels to flywheel, just do the opposite i guess, do the maths.

[Angry]

i think its plus 25% for RWD to flywheel.. but i could be wrong

[blind_elk]

The losses thru the drive train will diminish as a % of power as the power increases ie don't expect a 300 kW car to have the same % loss as a 100 kW car.

In general, at the numbers we are dealing with here, add 1/3 of the rwkW to get fwkW, so, you should have approx 270 fwkW.

If you use a Dynamic Test Systems dyno, they have a procedure to accurately determine fwkW from rwkW.

[fresh]

HP at the wheels is KW at the motor vaguely, thats whats i've heard

[Freebaggin]

It's a fixed loss depending on what type of car you have:

- Big V8 or XR6T RWD, 60kW loss

- Small FWD, 40kW loss

- Mid size RWD or small 4WD (R32/33 or WRX), 50kW loss

- Mid size 4WD (GTR), 60kW loss

So a dyno can read 100 or 300 rwkW, you'll still only have that fixed difference between wheel and engine power readings.

[Bill]

thanks guys.

[rev210]

rwkw , multiply by the bulldust factor = engine powa