Hi all, I was just wondering on the factors of converting wheel bhp to crank bhp. Just dyno-ed my car and got the wheel bhp and was given the estimated crank bhp after assuming the estimated inefficiencies. There are very experienced tuners in here and I would like to get your take on how should crank bhp be calculated.

I got my evo dyno-ed in Malaysia. Air temp was about 30 degs celcius (abt 85 deg fahrenheit) and the humidity should be about 80-90%. Anyone can help?

 

The term "wheel bhp" is an oxymoron.

BHP = Brake Horsepower; as in engine brake.
WHP = Wheel Horsepower; as in measured at the axel.

To answer your question:

http://www.vishnutuning.com/dyno_myth.htm

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