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.

[carpenterdean]

Originally Posted by 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.

First off sorry for thread stealing banne
So which way do you go with the pinion lower number of teeth on a twistier track or other way round.
Thanks in advance.

[Jay Smith]

Originally Posted by carpenterdean

First off sorry for thread stealing banne
So which way do you go with the pinion lower number of teeth on a twistier track or other way round.
Thanks in advance.

On more twisty, tighter tracks, I go for a lower number of teeth, say 22 for added punch out of corners. I only go higher on faster tracks in an attempt to get a bit more speed down the long straights. If your motor is too slow, be careful not to overgear it as this could make it overheat.

[carpenterdean]

Originally Posted by Jay Smith

On more twisty, tighter tracks, I go for a lower number of teeth, say 22 for added punch out of corners. I only go higher on faster tracks in an attempt to get a bit more speed down the long straights. If your motor is too slow, be careful not to overgear it as this could make it overheat.

nice one thanks for the info

[Timee80]

i ran my b4.1 tonight for the first time at mansfield with a non boosted 13.5t losi motor using 75/31 gearing and it never even got remotely warm. The track is quite twisty with a shortish straight interrupted by a jump. I imagine it will be lacking outdoors but it will be my spare buggy that will be setup for wet weather anyway.