What is the highest amperage alternator you guys have ever seen before?. .. About 10 years ago when I was competing in SPL they had a class where you could only have a "Single Alternator" so I built a 1200 amp "Single Alternator" that originally was in my 1985 Blazer then ended up being in my 1999 Suburban along with 3 other 320's for a total of 2,160 amps total of alternator power. It had over 180° of belt wrap and had to be as tight as possible to not lose traction.