[peterd]

O.K. we have all talked about 500+hp. The question is where you are measuring it. A true measure is on the DYNO. However 427HP at the rear wheels is 508 hp at the flywheel if you use 18% drive train loss. Most crate motor spec are at the flywheel. I started this thread asking about the experience of going from 385hp to 500hp. My number is calculated using desktop DYNO, its the place you start when you are picking components for you new motor. I would love to here from folks that built a motor with a calculated flywheel HP number and then what happened on the dyno.