1. Welcome To GMTruckClub.com!

    The #1 Chevy Truck Forum Online
    Online since 2004, we are the #1 Chevy Truck & SUV forum and user community. If you have any questions about your Chevy or GMC Truck, SUV or Crossover, or just want to connect with other GM owners and enthusiasts around the world, you've found the best place on the internet to do that.

    Join Today ~ It's Free
    Registering is Free and Easy! Hope to see you on the forums soon!

alternator question

Discussion in 'GM Electrical Tech' started by reggiecab2000, Sep 3, 2012.

  1. reggiecab2000

    reggiecab2000 Member 100 Posts

    hey guys,
    just wondering if anyone knows the typical IDLE output of the oem 105A alternators, im just trying to settle my brain on this and cant find the info! is the idle 105 or is that the max?
    mine is a delphi and the only things i could legibly read are

    104803SSW 105A
    31501...
    some of those numbers may be wrong but kinda close i guess

    i cant find anything on this alternator...
    thanks!
  2. SurrealOne

    SurrealOne Former Member 1000 Posts 100 Posts

    No idea on the numerical rating, but the subjective rating is, IMHO, 'not enough'. :rofl:
  3. RayVoy

    RayVoy Active Member 1000 Posts 100 Posts

    I can not tell you the exact idle output of your alt; I can however, tell you that most factory units produce about 50% of the rated output at idle.
    A high performance alt might produce up to 70% of the rated output.

Share This Page