I'm just going by what the dyno guy across the way from me has told me. He would consider 20% loss with an auto and racing TC to be very optimistic. He considers 20-25% loss just to be a start for any stall over around 2200 rpm. Tony. Have you had yours on a chassis dyno? I agree with you. My numbers are optimistic. Without having had the car actually on a chassis dyno, it's really hard to guess. I can only go by what chassis dyno operators are telling me.