A 600 size Graupner brush motor will most likelly melt its end bell with anything close to 80 amps (that would be very close to 600 W) and the upper limit on these 500/600 size motors is more like 200Watts.
It as been a long tradition for car esc manufacturer to claim amp capacity well beyond what their product can handle. Any kind of PWM type esc require substantial heat sink to carry full power[8D]