rpruski

I have a Traxxas Rustler with a 5800kv brushless, running 11.1v 3s 5400 20c, not sure what pinion gear but have a 90t spur gear. Motor gets very hot, any suggestions on gear ratio's, or maybe need to get 7.4v 2s, I need help just getting into electric, always been into nitro, any help would be GREAT

Thanks
rpruski

fq06

iTrader: (12)

What 5800kv motor do you have? Is it 3s compatible?
My guess is no. That's a really high kv motor even for 2s.

Stadium trucks are very light and do not need much power to run fast, not sure I have seen a ST running on 3s before... must do wheelies down the entire block!

BT00561

iTrader: (29)

I run a 2S Shorty Pack 60C with a 3900kv motor geared at 26/87 and it screams, i can wheelie on the straights with no problem.

I would check your gearing and also check to see if the motor can handle a 3S, I dont run a 3S in anything I race.

theblitzkidd

iTrader: (11)

+1 on that, the 3s seem to make everything work harder, thus the heat probes, and breaking drivetrain, so I've made it a no no for me lol

Grandturk

iTrader: (5)

How hot is it getting? Hot to touch is going to be over 110 degrees, which is nothing. You need a temp gun. 160 is fine. 180+ depending on brand and you many start having issues.

fq06

iTrader: (12)

I don't know of a 5800kv motor that can run 3s. Maybe there is one, but I don't see how it could survive the rpm that pack would produce.

Once again... what motor is it?

rpruski

its a dynemite, and yes it won't stop doing wheelies, I bought the truck off ebay got a really great deal

fq06

iTrader: (12)

Motor will take 3s. If you have the matching fuse esc, that will also take 3s.

If you want to continue with a 3s pack, run a smaller pinion to help with temps. But I would suggest a 2s pack to make it drivable.

rpruski

I have a 19/90 so 2s would be better what gears should I run, I'm a Nitro guy just starting to get into electric

rpruski

Its a Dynemite fused brushless motor

fq06

iTrader: (12)

There are rc gearing calculators that you can find on Google to figure that out or post the question in the rustler thread. I'm not familiar with that truck.
Maybe someone can chime in that looks at this thread. You may need to change the spur and the pinion using such a high kv motor with a 3s lipo as you may not be able to fit a small enough pinion to get your gearing correct with the stock spur.

I think rustler thread will be you best resource. Easiest to find by Googling rctech rustler than trying with the rctech search tool... not the best.

rpruski

I will give that a try thanks for all the help