pinions

[markymark6183]

hi guys need some more advice. i've got the 10.5T fusion bl system on board my mad rat BUT the pinion is the one out of the kit which is the 21tooth, is this ok to run?? what difference does it make going more teeth or less teeth ?? and which would you recomend ???

thanks in advance

[minke]

I have the 13.5t fusion exceed. Went from a 21T to a 23T found it better.

[jpmatrix]

Just for a reference, I just upgraded to brushless on my Madrat.
I have installed a sp 7.5t motor and esc gt2.0 lrp speed passion and currently using a 24t pinion.

I gave it a test run on grass for 15min and the esc was just warm to the touch. the motor was not even hot.

I think it also depends what settings you have programmed into the fine tuning of your esc.

[Battle_axe]

with a 10.5 you want to be running a 27 or 28

[OneKiwi]

what about a 9T and a 6.5T??
are the pinions pitch 32?
48 pitch right?

[markymark6183]

That's brill cheers guys, I'll order up a 27 or 28t today

[markymark6183]

Originally Posted by markymark6183

That's brill cheers guys, I'll order up a 27 or 28t today

P.s what sort of top end speed would you get with a 27-28t ?

[jpmatrix]

Originally Posted by Battle_axe

with a 10.5 you want to be running a 27 or 28

Crikey, didnt know you could go that high.
As mentioned in my previous post I have a 24t pinion.
Is that about right for a 7.5t brushless?

Slightly off topic, Is it safe to run without a esc fan as my current one is dead?

[Timee80]

23 or 24 is about right for a 7.5t. no fan should be fine in a 2wd but keep an eye on temps. i ran a 27 pinion on a 10.5t and could have gone higher, prob best to fit a smaller spur actually as the motor is hanging way out back with a 27t pinion on standard spur.