i would figure you have maby a 120 amp alt but being that it factory once hott makes closer to 80/90 amps if it only had to run a amp not the car 80 amps is good for 902.4 whats if 80 percent effiant at 14.1 volts and 1015.2 if 90 amps 80 % effiant at 14.1 but that would be if the car didnt need charge it self low voltage = blown up amp with crispy power supply
