Originally Posted By 340Cuda
My son's car has EFI, Coil near Plug ignition, two electric fans, two electric fuel pumps, phones, laptop, GPS and an iPad all charging.

This year on Drag Week, driving in the rain with windshield wipers and lights on, no problems with 60 amp alternator.

I would have to agree with Andy that 90 amps would be plenty for most cars. Your mileage may vary...


Correction Dad, it is a 100 amp GM unit. But it proves well capable of running all that stuff even with a 5" crank pulley and an 8 year old battery.


68 Barracuda Formula S 340