[undy]

I honestly don't think any of the prominent (paranoid) engine builders here try to deceive anyone by "manipulating" dyno numbers. I don't recall any actual accusations here along those lines either... The problem is, the dyno numbers they provide show how much HP & TQ a particular engine can produce on the stand, under very ideal situations. Unfortunately, as Keith said, that is not real world Cobra numbers. Ultra low Cobra RWHP vs FWHP figures tend to be the norm.

Most OEM vehicles seem to have between 11% and 13% power losses between SAE RWHP and SAE "J" FWHP figures, whereby our Cobras show a 20%+ loss.