Originally Posted by
andrewdoherty
I would get a 70 tooth spur (Xenon makes a nice one) and use between a 53-60 tooth pinion depending on what fits. We typically run right around 100 mmpr on 17.5 1s so the numbers I gave should take you a little north of there depending on your tire size. If undergeared properly you may not need to detune the car any further. Even gearing to 105 or so and running the motor at neutral timing might do the trick.
Thanks for the reply, I will try those things. It will be interesting seeing how the kids do with the cars. They've done some novice offroad with T4's, but they are far from stellar drivers. They have fun though. I tell my son he'd have a little more fun if he'd slow down and he told me, "Dad, I'm never gonna slow down!" lol Then I introduced him to laptimes, and that got him more interested in not crashing.
