Motor Question

[TurnMeOver]

I have had this in the Castle thread for a while with no response o I figured I would move it up here and see if I could get some of your alls opinions.

I am running Mamba Max's w/ 5700's in my clod, currently with stock gearing on a 2S lipo. Both motors are getting a little warm towards what should be the middle part of a run. Front axle motor is still acceptable temp wise (although warm) but the rear axle reversed motor is considerably hotter. Is this normal? What can be done about it? I have the timing on both motors adjusted down to 6 which helped. Don't really wanted to have to go much lower. The rear motor heats up to the point it is borderline on the scientific "touch it for 2 seconds" test which results in not being able to complete a full run.

I have dropped to a 12 tooth pinion to see if that would help. The front motor is cooler still but the rear motor still gets too warm. Wierder still is that the rear motor is the newer of the two?!?

I am not sure where to go from here. Heatsinks maybe? Why does the rear motor run so much warmer than the front?

Are the Traxxas VXL motors better suited to the Clods? I would keep the Mamba speedos but gladly switch to the VXL motors if they run better on the heavier trucks.

 

[Ball Racing]

Are you running full set ball bearings?

The rear motor no matter what wind is going to run warmer, it does the most work,
brushed or brushless.

You need a temp gun to get a real reading to see where you need to be, and not just a touch test,
some motors can be 150 degrees, and you can't keep your finger on it for more than a second but it is still way safe on max temp.

I ran 7,700 mamba max on my clod on a 6,000 mah 7.4 li-po
I ran 12 tooth gearing,
and ran heat sinks.

They get warm, but still in the safe zone.

BUT<<<<<<<<<<>>>>>>>>>>
depends on the surface you run on..
Medium thick grass, and constant full take offs, and full braking for the life of the pack will make them hot..

If you are not driving like that, there may be something binding in your gearcases, and also may not be as hot as you think, you won't know until you get a temp gun on it.

But yes ,at least get some cooling fins on it..

 

[TurnMeOver]

BR thanks for the reply! Yeah I have full ball bearings thru-out and the gearcases turn nice and smooth. This is my first real racey Clod so it may just seem odd to me when in fact the temp diff between the two motors is normal. I do need to do a more sceintific method than the "oh cripes, thats hot" two second touch test. I also think I'll shop around for some fins for them.

Still curious on the VXLs also though cause they were made to push around heavier trucks (ie: Emaxx). I know Castle's stuff says in their literature that the Mambas are not made for Monsters or 1/8 scale but also know a lot of folks are running them in Clods out there so was just kind of shopping for opinions on all that.

 

[Hardcore]

As the rear motor spins in a different direction the timing should be adjusted to compensate for this. If i remember advanced timing only works correct in a specific direction?

 

[Ball Racing]

Brushless does not care about direction change and timing, the esc control the timing.

Now, on a brushed motor, the motor controls the timing.

And the VXL was not designed for the emax,, although they put one together for display at a hobby show..