MM Heat Issues

[macr0w]

Originally Posted by Finnster

Yeah, those motors are way way too hot of winds. 3300 and 2700kv is asking for trouble. your buggy's motor is pinning over 45k rpms. No way you are going to make 20min either on those batts pulling that many amps.

You have to get a lower kv motor. If you are racing, i would suggest getting a motor that would spin 28K-30K rpms. Even better would be to go up in voltage w/ the MMM and get the motor to match (like a 1515 2.5D on 5S or a 3D on 6S (maybe a 1.5Y on 6s too))

I would agree with you if there weren't so many people with the exact same setup who are running good. HappyWing for instance is running the exact same setup I believe.

Originally Posted by Arct1k

I found that the MM needed the extra cap for 4s - Add a novak HV cap 2700uf.

I burned up 3 MM to (one due to motor failure) - Since adding the extra cap no issues.

I thought about trying this. Maybe it's my next step.

[Finnster]

Originally Posted by macr0w

I would agree with you if there weren't so many people with the exact same setup who are running good. HappyWing for instance is running the exact same setup I believe.


I thought about trying this. Maybe it's my next step.

IDK about anyone else, but 3 burnt ESCs between 2 cars, 2 motors and 2 batts says something is seriously wrong with the setup &/or driver.

On the trugg, your FDR is nearly 20:1, that really really low for such a powerful motor like a 1515. Even with that hot motor you should be somewhere like 15:1 as starters. That puts you at 50ish mph and 150A at least. You've tried to gear down for a reasonable track spd, but a motor's efficiency dies if the motor is not properly loaded. Low eff, lots of heat. That may be a big factor. If things are setup right, you won't need all the fans and crap nor a swiss cheese shell. FWIW, RCM Mike runs a 2.5D on 5S, and I had a 2y (1100) on 9s A123 (about 28K rpms too) and both have plenty of power for the track and no crazy thermalling.

Also, the way you drive may be contributing. Do you stab at it like a nitro? How aggressively are you pushing it? That may be something to do with it as well. I hope a cap fixes it, but IMO you have probs beyond what a cap can do.