Marco Andretti, Came from shifter karts, the closest thing to an indy car performance wise for under 500,000, so did Scott Speed in F-1. don't forget those are 150 mile an hour go karts. Dirt doesn't help you go fast in an indy car But it's alot more fun. winged pavement 410s are a good trainingg ground and faster than an indy car on a short track.