Charging issues with Toyota style Denso Alternator

goldduster318 said
Anything more than 12.8V (voltage of a 100% charged battery) under all the loads is just fine, since this isn't a police car or something where it will idle all day.. I'd say your problem is solved.

Another question would be what gauge wire goes from the stud on the alternator on it's path to the battery? It should probably be 6 ga for that high output of an alternator but you might be able to get by with 8. If it's 10 or smaller the wire will almost certainly be causing a voltage drop.

I suppose it’s because I always seem to get an uneasy feeling when I come to a stoplight and see everything dim slightly, turn signals start blinking slower, etc...that I think the car is going to die but maybe you’re right.

I am running 4AWG cable from the alternator B+ stud to my inline fuse and then to the starter relay. Voltage drop across this circuit is about 0.10 volts.