Thanks for posting the videos Skiddins, very nice comparison. The full mod cars are very impressive, but I'm very suprised at how fast the boosted stock cars are. I can barely tell the difference most of the time. They have plenty of low end, and the turbo timing really helps on the long straights.
Also, thanks for the info Robert K. That was exactly what I was looking for.
With all the great info all of you have posted, I have a complete idea of what to expect from the different power systems, when before I really had no idea how much the difference was in average speeds and handling characteristics.