I seriously doubt that a motor that won so many awards for the most HP per CC in history is going to get much more in IT trim. We might have some future Formula 1 engineer among us--who knows? Same for the RX8 which is weighted in IT trim to get the same HP numbers as a prod motor. When you get cars classed by just power/weight the tires become a big issue on the heavier cars.

Process weight for the S2000 is correct by todays formula.