P1P!

I know my wheel horse power numbers from Ecutek DeltaDash Road dyno but interested to know that these equate to at the crank.

What Wheel vs Crank HP numbers have you seen from your dyno results for your impreza:

300-400 bhp cars
400-500 bhp cars

Cheers

Peter

addi monster

iTrader: (6)

whats your wheel hp, i will convert it for you

P1P!

thanks I get between 380-389 in 3rd on a uk 6 speed box

addi monster

iTrader: (6)

thats around the 480bhp mark at the flywheel, nice power there,.

P1P!

thanks that seems a bit on the high side. It's a 321T on a 2.5 so was expecting around 450 I guess. What calculation are you using?

addi monster

iTrader: (6)

i have got loads of dyno graphs from the scooby clinic, what i did was divide the flywheel bhp with the wheel bhp and the average number i was getting was 1.25 so in theory if you times the wheel bhp by 1.25 you should be pretty near your flywheel bhp,.

prodriverules

iTrader: (52)

The average loss from wheel to crank is 22% mate

P1P!

thanks for the responses chaps

Galifrey

iTrader: (3)

Indeed, divide whp by 0.78 so 487bhp at the crank assuming the 380 whp figure.

addi monster

iTrader: (6)

thought i was along the right lines

B0DSKI

iTrader: (17)

16-20% is realistic