I'm not entirely sure if I understand your post, but I just skimmed through it. Edit: I don't understand your post. Despite
as some mentioned, drivetrain loss is mainly to blame for the difference you seen in crank versus wheel horsepower. Typically it's around 15% loss for RWD (has to send it all the way to the back), and a bit lower for FWD cars (less distance to travel).
I think someone mentioned whp from mods. Individual mods add a good amount, ie intakes, tps/hfc, exhaust. Put them together though, and they unfortunately don't yield the given whp added together. Understand? Stillen Gen3's add...what? 20 whp...supposedly? Pipes and exhaust add 27 whp (let's just say). The total gained doesn't equal 47 whp.
No idea if that even answered your question...
