Author Topic: Alternator question  (Read 2170 times)

0 Members and 1 Guest are viewing this topic.

Offline gusszgs

  • Turbo Street Modified
  • *****
  • Posts: 431
  • PSI: 1
  • Limited quick brick
    • View Profile
Alternator question
« on: November 16 2016, 08:50:43 PM »
Hey guys.
I'm getting a little suspicious of my alternator's output. Seems pretty good when car is first fired up cold. It's in the 13.6-14.0 range. But after driving awhile the volts seem to creep down to the low 13's, and yesterday while I was out I seen the voltage flickering between 12.8-13.2 range.
This was at dusk and I had the parking lights on as well.
Is this an acceptable range when hot? This is the stock factory unit.
At the track, on my logs from PL the voltage is just shy of 13v at WOT........12. 8 range. TIA


Jim
Jim
1987 T Limited

Offline Just a Six?

  • OK Now who Farted??
  • Turbo Street Eliminator
  • ******
  • Posts: 1252
  • PSI: 2
    • View Profile
Re: Alternator question
« Reply #1 on: November 17 2016, 02:08:06 PM »
As Steve would say, check it right off the Alt & see what you get. SM & PL readings could be lower from old factory wiring. Wow, I did learn something after all these years!
David
87 LTD. Purchased May 88
Doeskin leather, coach lites without Landau Roof, moon roof, carpeted trunk & No Factory Hood Ornament!
The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
Runs 11.50 on 21 lbs with my old style 67 Q Trim & Alchy

Offline daveismissing

  • Two Buicks- too little money$$
  • Turbo Street Outlaw
  • *******
  • Posts: 6515
  • PSI: 3
  • Two Buicks- too little money$$
    • View Profile
Re: Alternator question
« Reply #2 on: November 17 2016, 06:09:19 PM »
That is about where mine is, never been a problem on the street or failed to keep the battery charged. I expect the racers will say you need more omph.
-Drain plug by Earl Brown, custom oil pan by Rich's Auto

Offline gusszgs

  • Turbo Street Modified
  • *****
  • Posts: 431
  • PSI: 1
  • Limited quick brick
    • View Profile
Re: Alternator question
« Reply #3 on: November 18 2016, 08:00:28 PM »
Ok, so I checked today at alt cold and got 14.6v.......we nt for drive, about an hour or so. Got home and checked hot. Voltage was 13.7
Guess all is well with it. Thx guys
Jim
1987 T Limited

 

SimplePortal 2.3.7 © 2008-2024, SimplePortal