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

 

whats your wheel hp, i will convert it for you

 

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

 

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

 

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?

 

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,.

 

The average loss from wheel to crank is 22% mate

 

thanks for the responses chaps

 

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

 

thought i was along the right lines

 

16-20% is realistic