Results 1 to 9 of 9

power loss from alternator?

This is a discussion on power loss from alternator? within the General Help forums, part of the LSx Technical Help Section category; Ok I was wondering if my alt. is not working at 100% how it would affect performance. Since I have ...

  1. #1
    Member DemonSpeed's Avatar
    Join Date
    Nov 2005
    Location
    Virginia
    Age
    36
    Posts
    220

    Pewter Metallic
    1999 Trans Am

    power loss from alternator?

    Ok I was wondering if my alt. is not working at 100% how it would affect performance. Since I have a racetronix fuel pump wired off of the alt. it should cut my power some if its not working right correct? I ask this because my car sometimes feels ok, sometimes feels like a rocket and I have noticed that my lights dim when im slowing down and the car downshifts and my volts go from about 3/4 to almost half from a ten min. drive. I should also mention that I have swapped in an ls6, do I need a bigger alt.? I thought i read somewhere that the z06's alt puts out more amps. I also have a red top optima. Sorry for the long post guys
    Last edited by DemonSpeed; 03-11-2010 at 09:25 PM.
    LS6 Engine swap, Custom Predator Tune, Lid, SLP Cold Air, Ram Air H.O. Hood, Hooker Long Tubes, !Cats, 3" True Duals w/Dynomax Bullets, Performabuilt stage 2 w/3600 stall, B&M Trans. Cooler, Moser 12 Bolt w/ 3.73's

    Pics of my car
    http://community.webshots.com/user/demonspeed_ta

  2. #2
    Senior Member bigrondownhiller's Avatar
    Join Date
    Feb 2006
    Location
    Orange County, NY
    Age
    42
    Posts
    2,674

    Black
    1996 Camaro Z28 vert

    If you need constant power you should run it off the battery and not the alternator. It could be affecting the way the car runs. Did you put a voltmeter on the alternator? Should be putting out around 13.5 volts. Check at the alternator and the battery. Should be minimal difference between the two. another thing to check is all of your connections. Could have some corrosion.

  3. #3
    Member DaddySS's Avatar
    Join Date
    Oct 2005
    Location
    Bergen Co. NJ
    Posts
    590

    Black
    2000 Camaro SS Conv.

    I don't know how much amperage the racetronix pump draws but it shouldn't be enough to impact your charging system. Your battery should remain between 13.2 and 14.5 volts and the light should not dim. First step with charging system checkout is to clean and tighten all the connections, and while the positve cable to the alternator is from the battery, you should run the pump off the fuse panel, not the alternator. The f-body oem alternator is 102 amps, the C5s are either 110 or 130 depending on version. Before trying to install a vette alternator, (102 amps should be plenty for most cases) clean and tighten all connections and rewire the racetronix to the fuse panel.
    Last edited by DaddySS; 03-12-2010 at 05:08 PM.

  4. #4
    Member DemonSpeed's Avatar
    Join Date
    Nov 2005
    Location
    Virginia
    Age
    36
    Posts
    220

    Pewter Metallic
    1999 Trans Am

    i was told by racetronix and others that running off of the alt. would give constant voltage, is this not right? Also is there anything about the ls6 that draws more amps than the ls1 or is the vette alt. bigger for other reasons. Thinking maybe a combination of the fuel pump and ls6 would be enough to affect it? thanks guys, ill check the voltage.

  5. #5
    Moderator Cutlass's Avatar
    Join Date
    Apr 2008
    Location
    Madison, WI
    Posts
    6,997

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    Quote Originally Posted by DemonSpeed View Post
    Also is there anything about the ls6 that draws more amps than the ls1 or is the vette alt. bigger for other reasons.
    no vette alt is probably bigger for another reason

  6. #6
    Senior Member bigrondownhiller's Avatar
    Join Date
    Feb 2006
    Location
    Orange County, NY
    Age
    42
    Posts
    2,674

    Black
    1996 Camaro Z28 vert

    Quote Originally Posted by DemonSpeed View Post
    i was told by racetronix and others that running off of the alt. would give constant voltage, is this not right? Also is there anything about the ls6 that draws more amps than the ls1 or is the vette alt. bigger for other reasons. Thinking maybe a combination of the fuel pump and ls6 would be enough to affect it? thanks guys, ill check the voltage.
    The alternator maintains the battery. Anytime you power something you should always go to the battery or fuse block. LS6 shouldnt draw more amps. The vette might have a more powerful alternator due to other draws in a vette. If you move the power to the battery you should be fine just as long as the alternator is working good.

  7. #7
    O U 8 1 2 Spaz's Avatar
    Join Date
    Nov 1999
    Location
    over here...
    Age
    39
    Posts
    25,693

    []D [] []V[] []D
    1999 trans am

    Quote Originally Posted by DemonSpeed View Post
    Ok I was wondering if my alt. is not working at 100% how it would affect performance. Since I have a racetronix fuel pump wired off of the alt. it should cut my power some if its not working right correct? I ask this because my car sometimes feels ok, sometimes feels like a rocket and I have noticed that my lights dim when im slowing down and the car downshifts and my volts go from about 3/4 to almost half from a ten min. drive. I should also mention that I have swapped in an ls6, do I need a bigger alt.? I thought i read somewhere that the z06's alt puts out more amps. I also have a red top optima. Sorry for the long post guys
    i would have wired it to the battery... i'm pretty sure you can use the post on the drivers side also...

    i also have a LS6 swap and have been fine with my alternator (with the exception of my power steering peeing all over it)...

  8. #8
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Factory alt isn't up to the added accessory.

  9. #9
    Senior Member JayTA98's Avatar
    Join Date
    Dec 2007
    Location
    Orlando, FL
    Posts
    3,351

    Mean Black
    1998 Trans Am

    I have to agree with all the guys here. Check the connections 1st. In my case I had another different problem that resolved in replacing all the main charging system wires. I noticed right away that my voltage increased and my lights don't dim anymore. I'm not saying swap the wires but if anything else fails and nothing is making sense you can try that. I had a post on my whole story of it but I can't remember the name of it. Good luck

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Help: Power loss
    By davidz28 in forum Camaro / SS
    Replies: 3
    Last Post: 09-11-2010, 09:00 AM
  2. Loss of power
    By 99RTA in forum General Help
    Replies: 0
    Last Post: 05-19-2009, 06:52 AM
  3. Help: Power loss
    By BIG GUNS in forum Internal Engine
    Replies: 1
    Last Post: 10-20-2008, 01:44 PM
  4. Loss of power help
    By mr.5.7 in forum Firebird / WS6
    Replies: 22
    Last Post: 06-22-2007, 12:41 PM
  5. power loss
    By docsmopar in forum General Help
    Replies: 3
    Last Post: 10-08-2006, 03:43 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •