[lutach]

I think aerodynamics will play a big part on this. Raw power is good, but to reach the that kind of speed, you'll need to cut through the air. When I used to drive my go kart it would never get passed 100mph even with the little turbo my grandfather got me, but we added a new body and I was able to reach 120mph (It got a bit too scary above that). If you reduce the drag, who knows what kind of speed 50000+ RPMs and 10000 watts of motor power would be able to do.