Oh yeah, oops.

what are you settings exactly? can help diagnose the issue.

It's done this since it was new. I quit running it for quite a while and the class picked back up and issues has now returned. I'm pretty sure I have temp limits raised just to make sure that wasn't the issue. I will check settings tonight and reply back. There are a lot of settings, which ones would be main ones to document what they are?

personally I woudl think anything that would deal with "protection" such as temp and voltage cutoff.

The most common mistake is the motor temperature protection setting. Is it disabled? If not, what temp is it set at. But, I still think it is a battery connection issue.

One way you can rule out the thermal cutoff is if it only happens after the car is being run for several minutes. However, if it is happening at random times it has to be a short somewhere. Wither it be in the battery terminals, motor wires or the sensor wire/ sensor board in the motor.

If I remembered right, it was disabled. But I was having the issue and enabled it and raised it way up to see if it made a difference. It was late in the main when it stopped both times. I checked temps when it came off track. Don't remember what it was, but it was well under 200.

I would check/replace the battery connectors. Had bad connectors cause similar problems in the past.

My money is on the connectors too.

one thing to remember is that the inboard temp reading comes from inside the motors and esc so that could still be the issue if not disabled.

If it is always late in the run and you can rule out the temp my next thought would be the voltage cutoff. what are your batteries at voltage wise after this happens? Are they always around the same voltage? You may be dipping past the LVC under a heavy load.

While the subject of motor temp protection is being talked about let me clear up a common mistake. The motor temp protection is internal temp. Not external. If you have it set for 200 degrees it may only be 140-150 on the outside. With most motors, if I want the ESC to shut down with an external motor temp of 160, I usually set it around 230. After I figure out my gearing, I turn the temp protection off. To figure out the internal/external differential, set the motor temp protection to 160. Run the car until it shuts off on thermal. Measure the outside on the hottest spot. If you have a 50 degree differential, set your ESC 50 degrees higher than you want your motor to shut down at.

I leave my protection on to save my equipment. Why do you turn yours off Jim?

Once I find my correct gearing I don't worry. Plus, at 2 different national events, I lost a qual because I had the motor temp protection set too low. I gear my vehicles to come off the track around 130 max. That way any outside temperature issues keep me safe.

Broken switch...

My ESC settings at this time:

battery cut-off 6.4v
motor temp disabled
esc temp 220
sbec 6.0 v