I had a new slot car race track with step down transformer given to me by my Grand Parents for a birthday present. One thing I did notice, is the car with the lowest internal resistance motor used to go faster, well that's what my Dad told me at the time. I found this to be very true on a friends track. Later on when I was given lots of slot car track, controllers and cars to play with. After a while, I was able to modify and rewire certain components and have 2 cars on the same track. I am building another prototype just for when I get tired of the computer.. It was a lot of years ago so I was wondering if anybody would like to help me come up with a circuit that works so I don't need to do it all again.