Hello,

I bought the HobbyWing EZRun Max 8/2200Kv 4274 Combo and put it in the Redcat Landslide XTE, with the Kraton 6s tires on
I'm running two 3s 5000 mAh/100C LiPos in series, but the ESC is going into thermal protection shutoff (I have it set at 105C/221F) within two-three minutes of driving it around the yard.

My question is, is using 100C LiPo's the reason for the excessive heat, or because the weight of the vehicle.
The manual states that if the vehicle is above 7KG, to use the Max6 ESC. It's a little above that weight, but didn't think it mattered that much, to where I can't play with it for more than a few minutes.

Hello,

Hope you are well.

Your temperature protection cut off is set correctly, that is the Max temp for that setup recommended by the manufacturer.

First thing to check is your spur/pinion gear mesh. If it is too tight you will overheat. Rock the spur gear with your finger back and forth, there should be a little play. If it is too tight adjust your motor mount position. After adjustment rotate the spur gear a complete 360 degrees to check if it binds anywhere in its range. If it does, readjust. Make sure the spur is not damaged also.

If your mesh is set then read on.

When dealing with heat it is about the size of your tires and your gear ratio vs the surface you are running on combined with the efficiency of your motor and esc combo.

Grass and Sand will overheat your setup much more quickly than hard packed dirt or a paved surface.

For running on grass vs pavement a good starting point is to go down 2 teeth on your pinion then test your temperatures.

Putting larger tires on will necessitate lowering your gear ratio to compensate. Are the new tires larger in diameter, or heavier, than what was on your vehicle before?

For larger tires go down 1 or 2 teeth on your pinion gear and test your temperatures.

If none of this helps your heat situation, you could be binding somewhere else in the drive train. Disconnect the motor from the drive train and push the vehicle, does it roll smooth or does it have resistance somewhere in the roll? If so, you could have a damaged differential or a binding drive shaft. Check all of your drive shafts to the wheels and center, usually it is one of the front drive shafts that will get bent and start binding. Check all of your differentials for damage and proper fluid levels.

Your high output batteries are not causing the problem, they just allow your ESC to draw upon more power when it needs it.

Hope this helps.

Later,

Tony

Ah...something very simple I forgot in the above post...

Is the ESC fan running? Sometimes forget the really simple stuff.

Later,

Tony

Can't find specs on the original 1920kv motor that was in your truck. However, if all else is equal that 1920kv motor should develop more torque and handle a heavier vehicle better with larger tires than a 2200kv motor.

E-mail Redcat and ask whether their 1920kv brushless motor can handle 6s with your ESC upgrade. If it can, put the old motor back in on 6s with that heatsink. You may be surprised at the performance. If it runs well, just sell the 2200kv motor.

Later,

Tony

Tony,

I did check the spur/pinion gear mesh, but did not go down a tooth or two on the pinion.
From what I understood, is that if the gearing ratio is over geared or under, then the motor would be the one too get way to hot.

Checking the temp on the motor once the ESC shutoff, the motor was only at 170F, that's why I was wondering if it was the batteries or something with the ESC.

But I will try to go down two teeth on the pinion and double check the mesh. As well as check the drivetrain and fluids. Was going to put some higher weight diff. fluid in anyways.

P.S. The fan is indeed running.

Hello,

Were the batteries hot?

Later,

Tony

Tony,

They are hard cased batteries, but they were really warm after the few minutes. Not sure what's considered too hot for batteries though.

Also, was planning to give Redcat a call and ask them, just to see how it performs with the factory motor.
I ran it on 4s and it was still pretty sweet, I had the Hobbywing combo and figured wth and slapped it on there.

That Redcat stock combo is not bad at all. Especially if you have the new 120amp ESC not the older 80amp one.

This might very well be an ESC issue.

Swap out the ESC with the Redcat one (if it is the 120amp) and run the new motor on 4s and see if you have a problem.

Probably fastest thing to try to eliminate ESC problem, or point to an ESC problem.

Later,

Tony

Faulty ESC would be just my luck.... How else could you really narrow it down to know for sure that it's the ESC?

It is the 120A ESC, BUT, the motor connectors are 4mm, whereas the Hobbywing are the 6.5 mm bullets.

Hello,

Sorry about that mismatch on the size of the bullets. Nothing can ever be easy. You, would have to make, or buy, a pigtail convertor from 4mm to 6.5mm.

Getting in the weeds here. If all else fails just put the old system in. It is not a bad system at all. I doubt it overheated with that torquey 1920kv in it, especially only on 4s.

Later,

Tony

Should you decide to go back to the old ESC/Motor, I might be interested in the HW Max8/2200 setup.