Originally Posted by Taman
Brings back a lot of good memories seeing my Toms sitting on my desk
I just bought a 10.5 1 Cell SP motor, what size pinion would I need using the kit spur? Or do I need to change the Spur aswell, I'm running in an open carpark and occasionally at a track with a 20 meter straight.
Gratz on the New RM
Stock roll out is about 37mm with new kit tires. 63x14 gear.
I would try it with kit gearing at your track.
At our 90x45' carpet track with a 10.5 boosted 48 roll is close. i.e. 63x18 gear
This is with my 12R5, as I only run the RM in stock 17.5 so far.
I'm not sure what the largest pinion that will fit is, as I do not run Tamiya gears ?
If you do not not have boost options, you may want to turn up the timing to see if that will give the speed you are looking for in the car park, and or the track.
Have fun, that is a lot of power for this chassis on such a small track though