4g61t.org

13.5-14v'ish is always going to be the output, but if you have a higher output alternator(in amps), your putting less strain on the alternator to do work (watts). In theory, if you put a higher amp alt. in a car, you just add to the reliability. You might gain a little bit in charge if there is a huge voltage dip, but I haven't played around with this stuff to see the real world effect of resistance(load) on an alternator.

Keep note though, a 90a alternator doesn't always output 90a, and with that... the more load you put on the alternator, the more mechanical resistance you put on the engine(horsepower/torque).
What alternator companies don't post is there efficiencies. Therefor you may gain or loose hp with different alternators.

Also another thing to keep in mind(which you will only have to worry about if you want to use close to 90a) is that you not only put a load on the alternator but the wiring, and fuzes. Most likely the wiring is the same. But if it isn't and you start blowing fuzes under a higher load(example you have a mad sound system turned all the way up, and you have a toaster oven in your car). If you just replace it with a higher value fuze, you may cause an electrical fire if you don't do the calculations for wire sizes.

I just explained a whole lot of nothing, but hopefully it gives you a better understanding.


All in all if you can get a higher amp alternator, and you intend on using it for the same loads as you have now, I say go for it, It can only help with reliability. And your fuzes will save your butt if the load gets high anyways.

what is the amps of the stock turbo alternator? can you switch using those alternator from turbos?