Thermal shutdown?

I ran my car today balls out in an open parking lot. Turbo was engaged 30-40% at 24Degrees, and 15degree of base timing. I found my car after running 15-20 minutes or so, went into thermal cut off. The motor and esc were pretty hot. The cars power was consistent up until that time. But then afterwards was cutting out for a second or so, then came back on, then cut out, then came back on, I am guessing because the motor at the ESC were heating up and cooling off between pinning the trigger.

Since you're running 4s, this would probably happen a lot quicker. I am going to have to find a way to passively cool my motor and ESC better.