losi xxxcr gearing

[tmaxxlosixxx]

any ideas on wot gearing i shud be using wiv 13.5 iv currently using 25/84 its indoors wiv lipo

[Chris56]

Originally Posted by tmaxxlosixxx

any ideas on wot gearing i shud be using wiv 13.5 iv currently using 25/84 its indoors wiv lipo

Depends on the size of the track but as a starting point go for a FDR of about 7.2, using 28/84 (you will probably be able to go a few pinion sizes higher if the motor isn't getting too warm)

I currenly have 22/82 with a 7.5 motor outdoors and I don't have any overheating issues

[tmaxxlosixxx]

thanx mate iwas using 21/84 so its well down then

[liam]

I thought FDR was meant to be about 9.5 or something? If this has changed it would explain why people are using large pinions compared to the "old" days

[Chris56]

Originally Posted by liam

I thought FDR was meant to be about 9.5 or something? If this has changed it would explain why people are using large pinions compared to the "old" days

Depends what motor you are using. If you are running a 6.5 then and FDR of 9.5 is about right but slower & torquier 13.5T motors will use a higher ratio.

[liam]

right i see. so my 8.5t should have a FDR of about 8.5? or 10.5?

cheers