Well I installed an EZRun brushless system with a 9.5T motor and Losi 2.4g RX. The spur gear is 94T and I picked up a 30T pinion. I can smoke the tires but it is totally uncontrollable. I can just hold the throttle down and it wil do a million donuts. Try to stop and it just spins. Can't steer it cuz it will just spin. I have the punch turned down, the steering turn down, the brakes only at 50%, the drag brake set real low but I can't control it.
Oh and the damn fan doesn't work...brand new.
But I can smoke the tires for a couple of feet.