I have a NSR Mosler and I found that it had too much power to run without a magnet, even at 10 volts. Perhaps on a very high grip surface the stock motor would work better. The car now has a Slot.it 21.5K motor, a Shark 22 would have about the same performance. My car has the sidewinder pod with spring suspension. As it came the splitter at the front of the car wanted to drag on the track and the front tires were not planted firmly. I had to shim the front axle to get the front tires on the track and raise the splitter a bit.