Sorry to come late to the party. Been out loading for CMP. Yes the Koni Challenge cars are spot on an IT build and were free ECU until this year. The numbers I posted were from a front running car (don't ask which one) and were all done on the same Speedsource Dynojet. I have used the same dyno for my ITS car and got within 2 hp from there to dynolab in atlanta and to a Dynojet in Asheville so I am pretty confident in my numbers. The rear wheel on those 2 cars does show almost 15%. You have to stretch pretty far to believe it looses 66 hp in the driveline. Was the original car a little of a pig--yes it seems so. Did Motec M600 and a very good exhaust and 3 years of tuning fix it--yes. At your assumed driveline losses that puts the motor at 275.3 hp (theoretical) Now apply those same numbers to other cars and they don't pass the smell test.
Reality check here. Do you honestly believe that 195 or even 205 rear wheel with 140-145 ft of torque is a match for a 215 hp 225 ft of torque BMW at the same weight, let alone at 215# heavier. Get a grip guys, something is wacked in this equation. The S2000 is in the same boat. You have got to realize that somehow torque has to be considered a little more than a trivial 100 pound drop. We give up 70# rwtq to the BMW. It is the same with most of the big 6 motors in the class but the BMW is the only one I have first hand knowledge of the numbers on and that has been publicly admitted to in the SIR debacle. I have seen more but will stick to the established numbers. I would have welcomed this discussion before the ITAC published the classification. I would have been happy to provide information to the CRB but never got the chance. All we got was it was being looked at and then it is in fastrack.