Redjet78

I ran my rustler with a 76s 31p a few pasess and the 3500vxl new motor was like red hot i following the guide lines on a traxxas gear ratio chart with 4000mah id battery every pretty new motor got really hot and following the guide lines why would my motor get so hot the car run really quick but why so hot what the deal with that only running 11.1 volts ?

rgburrill

Not to be a grammar NAZI, but you really need to use some punctuation so that one can understand what you are saying.

Redjet78

The vxl motor overheated sorry about the spelling my youngest was on my side but.Found the problem the clutch was slipping! I only hope i did not damage the mother its brand new about five runs on it!!!!

EXT2Rob

My Feedback: (1)

Red, get ye an infrared thermometer. Use it to monitor motor temps. Temperature can tell you a lot of things. For instance, if you know all other things (like a slipping clutch) are working fine, and you notice your motor temps are up 10 degrees above normal, you might have a bearing that is binding. Brushed motors, especially stock throw-aways, do not like getting hotter than 160F-170F. I've had brushes fall out because of that. Brushless motor shouldn't be run above 180F, as it weakens the magnets in the rotor, and can cause the wire insulation in the windings to melt. Get a thermometer, and get to know your car's sounds and temps when it's working well, so that you know something is wrong when you hear a weird sound, or see the temps going up.

As for that slipping clutch, you might wanna take out the slipper pad and scuff it up with some sandpaper. You probably glazed it.

DieHarder

Rob gave some great advice. On another note though, I've done a lot of running on a VXL with 3S and they do get really hot, really hot to normal standards that is. A normal brushless motor shouldn't get above 180* (like Rob said) but with the VXLs, they run around 190* when bashing offroad on 3S. I had my endbell up to 210* once and flipped out when I discovered it (stopped it and let it cool down. I was still working on the gearing then), but that was almost two years ago and I'm still running the same endbell/rotor today. The things are tough. I've had the system for like four years now, and the rotor has become weak enough that I can run 3S all the time with lower temps. My advice who be, if your motor tops 200*, you need to gear down. Even if it hits 190* you should still drop a tooth or two. The VXLs just don't run cool.

Maj_Overdrive

My Feedback: (11)

You may have read the Traxxas gearing chart but their precautions are way too vague. The fact is you can't run that gearing (60+mph) and expect to make more than a few passes before the motor heats up too much and needs to cool down. The limit for constant running is 40-45mph, gear for more than that and the load is simply too high, the higher the load the higher the temps. If you want to go that fast and not cool down you need a bigger motor that can handle the load.

Redjet78

Yes going get one thank you have thought about that thank you again