I've seen old long stack 17.5 motors pull 100A in blinky on track. These are spikes where the current draw is momentary. My short stack 21.5 is indistinguishable on track from that old long stack 17.5 My sample rate for data was 10hZ and the sensor was only rated for 100A so it is possible that a higher sample rate and a sensor with more headroom would show larger spikes. This was all with old stand alone telemetry stuff. My new esc's have data logging, but I haven't really messed with it. I've recently turned to the dark side and built my first dirt oval car. Maybe instead of the hand me down esc the sprint car needs the esc with telemetry so I can answer some questions.

As other have stated how you drive can minimize heat build up, but ultimately those who have an esc with a higher amp rating can comfortably drive harder and not have to worry about overheating something.