Originally Posted by Coach-Z

Just a little update.

If you decide to go for a 38/20 pulley set, you will need larger belts than the ones that came with the car.

You need 513mm at the front and 189mm at the back.

For me though, I actually have enough speed right now with the 68T spur and the 32T pinion I'm running right now. Still just aiming for keeping the car on the track, just map I don't have to go get it out of the grass and bushes every two minutes.

I'm still gonna swap the pulleys when I get the new belts though, cause that keeps the front belt clear of the pinion set screw.