No, I didn't find 25hp on any motor, those #'s were just made up numbers that made the math easy to do in your head.

I had been thinking about it due to all the talk on the SIR page, using 18% for the driveline losses. Going on about a 210 WHP car then turning out say 175WHP all the while using the same 18%. Or the typical equation of 25% gain for IT mods, then 18% driveline loss - well is it 18% from the stock # or the improved #?

I was wondering if anyone had ever seen actual numbers posted. I don't disagree, they are all relative to the dyno being used. Although I was talking to a Dynojet guy who commented that any of the good ones will all be w/in about 3% of each other.


Matt