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Benefits Posted by Ari [Email] ![]() ![]() In Reply to: Upgrading the 80A alt to 115A alt. Any benefits or, Daren, Fri, 1 Oct 2004 15:37:46 Members do not see ads below this line. - Help Keep This Site Online - Signup |
The 115A is a nice upgrade, especially since your car has a few extra power loads - rear door fans, fog lights, etc. I went from a 80 to a 115 on my '88, and immediately noticed better charging voltages at idle during high loads - headlights, blower motor, rear defroster, etc.
I'd pull the VR and check brush length. If they look good, fine. If not, change the VR. Also inspect the commutator (where the brushes run) inside the alt when the VR is out. A little wear is OK, watch out for scoring or blackening. Lastly, spin the alternator by hand, and feel the bearing. If it feels good, fine. Don't put it in if the bearings feel bad. The last possibility is a bad diode, but that's hard to detect without powering it up. An autoparts store may be able to give it an out-of-car test; give one a call.
posted by 12.76.15...
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