1515 2200kv heat issues in buggy

[KniteWulfe]

Start power low, 0 timing, no punch. Never cogs until about halfway through the pack, on startup, and gets much worse as the pack gets low. Did you see the voltage dips on the 2200 16t graph? I hit the 3.4v Lvc after just 1400 mah. Gearing is for about 39 on the 14t pinion or 45 on the 16.

Also keep in mind I had a huge heatsink and fan otherwise my temps will hit over 200 even on the 14t. The temp spike happens right around halfway through the pack when the power suddenly drops and cogging starts. It's the same for both of my turnigy 4500 30c packs and the pairs 5200 30c packs. In fact it is worse with the 5200s. It didn't cog at all when the packs were new, and didn't have the power loss or other symptoms but the heat. It didn't even cog with the 17t at first.

I rebuilt the diffs and changed the bearings, and checked and triple checked the drivetrain for any signs of binding.

Anyway I've got over $400 worth of thunderpower packs on the way. If they don't help the issue at least I'll save a bunch of weight and eliminate that possibility.

[pinkpanda3310]

Originally Posted by KniteWulfe

It's the same for both of my turnigy 4500 30c packs and the pairs 5200 30c packs. In fact it is worse with the 5200s.

I notice on those graphs that the issue arises when the temp gets to 125-130. Your larger mah packs probably help to heat the motor just that little bit quicker.

I would imagine the esc would be getting fluctuations of temp at the same point but harder to notice if you are just using a gun and that's roughly when the fan kicks in.

Given it happens to any motor but the issue arises when the motor gets to a certain temp, one might assume mount is not integral at those temps. However, the car still rolls freely with no binding. Does it roll freely in reverse? I ask because that would be the direction of pressure on the drivetrain under acceleration.