30, 41, 46, 50 amp alternators? Yeah RIGHT

The issue with swapping in a higher amp output alternator to some systems is the wiring in the system is not large enough to handle the increased amperage.


If your car is 100% stock not really a problem. Add on goodies and the 40 amp alt can not keep up but the max amperage is only 40 amps.

Swap in a 100 A alternator, now the alternator can provide 100 A in wires designed to only handle 40. Now you have a fire waiting to happen.

An alternator only provides as much current as it is being asked for up to its max. Kind of like the engine. It produces as much horsepower as is needed for the conditions up till it maxes out.