C4.1 gearing

[Banne]

Hey.

I just bought me a C4.1 and shall operate with a 13.5 motor turns and a tekin rs. what gearing should I run??

spur =? pinion =?

[Banne]

nobody can help?

[Andrew Twigger]

Following the recommended gearing from your motor manufacturer is always a good starting point.

Work out your FDR (Final Drive Ratio):

Spur / pinion X internal gearbox ratio

Anything that applies to the B4 should be suitable as they share the same internal ratio - 2.6.

[Banne]

currently running in my b4.1, standard 81 t spur and 29 t pinion. has good top speed and good accleration.

[Chippy96]

Surely it depends on the size of the track and whether its tight and twisty or more open and flowing,and if its out doors how much grip there is wet/dry ect......

[Jay Smith]

I currently run a C4 with a 78 Spur gear and then change my pinion from anything between 20 and 25 depending on how twisty the track is or how long the straights are. I can't go any higher than 25 tooth pinion or my motor gets too hot.