Im wondering what size of alternator everyone is using. I have a 90amp one from an 80s chrysler vehicle, but yesterday the battery drained after I was stuck on traffic at 90 degrees ambient for about 40min, the derale 2400cfm fan was on all the time (I recently lowered the fan ON temps to 185 and 195 respectively so the engine ran cooler) and I was listening to music (2 amplifiers 2200w total, obviously not full volume), and then after a wile I noticed the voltage coming down until the car stalled.
Called the wife to bring her SUV and charged the battery for a while, then it started normal.
I got this alternator when the car was carburated, just for the sound system. But now with the efi, efi sump pump, CDI box and the electric fan the load seems to be too much for that alternator.
Amp has been there for about 6 months, the previous one was exactly the same but I replaced it because it started making noise on the bearing. The battery is a red optima 1000 cca, I installed it a month ago or so.
I was looking at a 90s 120A alternator from a ram charger (see pic below), since I have serpentine belt the options are less that for V belt. There is a power master unit 160a and others 200a and higher. Not sure what happens when you have an alternator much higher than you current needs.
Please let me know what you guys are running. Im planning to add front electric windows and AC to the car in the future.
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