What voltage are you reffering to that the motor can't pull more than 11 amps?? I have stocks that pull 12-13 at 7 volts no load, and I run on high traction asphalt indoor touring, thats not a very big track (10 sec laps) I run 3800's and my motors rarely come off over 150 deg F. And my car is very fast. I have been experimenting with trimming the trailing edge (advancing the timing) with fairly good results. Seems the motor has a bit more grunt (due to reduced brush wrap) but still high RPM, so I was able to gear up 1 tooth. Car is super fast, and has better punch.
You are right... and I will not argue on your point!
I wrote my answer without reading it... IT WAS AN ERROR ON MY PART.
What I meant is that motors that pull over 11 AMPS at less than 4 volts USUALLY OVER SATURATE the magnetic field. AND I SAY USUALLY NOT ALWAYS!!!
hope this clears it.