MM Heat Issues

[macr0w]

There are alot of guys successfully using the MM in their conversions. I know people who are running 20 minute mains no problem with the same vehicle, same motor, same esc.

I just can't figure out what you guys are doing to keep your MM's so cool. Or what I'm doing wrong.

I have a Mugen prospec buggy and truggy. The buggy has claimed 1 MM and 2 MMM's. All three went up in flames.

The truggy is new and I put another MM in it.

At no point with the either vehicle have I been able to run more than a few laps without thermal shutdown. I was able to run ok for a bit with my second MMM. One weekend I was able to finish three 5 minute qualifiers and a 10 minute main with no trouble. The next weekend it went up in flames before I even raced during practice.

I've done the case mod, tried 2 fans, tried 1 fan, went to direct solder on the motor, geared the buggy down to 10t/46t and the truggy is 11t/46t. Body is full of holes, now I'm using a receiver pack. Defaulted and recalibrated my radio. (which is a Spektrum DX3.0)

I have a Polyquest 4s 5000mah 25c and a Polyquest 4s 6000mah 20c battery.
The buggy has a Neu 1512/1.5/D/F and the truggy has a Neu 1515/1.5/D/F.

Both vehicles get up to 170 degrees fast and shut down. I have talked alot to Tom Frie about my setup. He has seen my buggy at the track. (in flames)

There is no binding in the drivetrain. They roll freely with the motor disconnected. I have 30k in the center diff on both vehicles.

My installs are clean. I've posted pics on here before. I can't figure out what to do next. I'll never be able to race like this.

Any thoughts?