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Alternaters

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by shawnboy, Oct 3, 2001.

  1. shawnboy

    shawnboy 1/2 ton status

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    Location:
    Toronto, Canada, eh.
    I have a stock alt that obviously can't keep up at idle speed when you run a winch and lights. I don't want to spend tons of cash on a green monster, what can I have done to my exsisting alt to get 50 or 60 + amps at idle?
    Shawnboy.

    If you are having too much fun it's probably illegal.
     
  2. txbartman

    txbartman 1/2 ton status

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    Find a local auto electric shop. They can usually either rewind your alternator to put out higher amps or they can sell you another one. I bought one locally that is a rewinding in a stock sized case that puts out a max of 180A. It was only $135 with a one year warranty. I have been very pleased with it.

    Brian
    A new day.... May God be with us all.
    <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Tribute</a>
     
  3. Executioner

    Executioner 1/2 ton status

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    Temp. Ft. Walton Beach Fl. home=Tucson, Az.
    If your running a winch, I don't think any alt. will keep up !
    Double the speed of the alt. at idle.
    i.e. reduce the pullie size.
     
  4. txbartman

    txbartman 1/2 ton status

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    Oops. Didn't see that you wanted 50-60 amps at idle. Sorry, you're screwed! j/k I think you would be hardpressed to get that at idle. Your two options would be to go with a dual battery setup to handle your winch load at idle or in situations where the engine is off (deep water). Your second option would be to install some sort of switch that will up your idle "remotely" while winching.

    I don't have a winch (yet), but my dual battery setup works wonders for my offroad lights at idel or even with the ignition off.

    Brian
    A new day.... May God be with us all.
    <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Tribute</a>
     
  5. prjt_blzr

    prjt_blzr 1/2 ton status

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    You can run the large frame altenator from a newer GM product and get about 80A at Idle. You will need to modify your alt baracket slightly for it to fit. I had a local shop do mine for about $150. The altenator will put out a tad over 80A at idle and 180 max.
     
  6. michaelm

    michaelm 1/2 ton status

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    do you have a part# for that piece?
     
  7. prjt_blzr

    prjt_blzr 1/2 ton status

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    It was a small shop (Hutchinson) here in COS that did it for me. They used a CS144 alt and changed some of the internals. I just told them what I wanted and they let me know what they could do so there are no P/Ns. I'm sure that a good electrical shop near you could do the same. The other option would be to try powermaster or some other custom alt manufacturer or you can call Hutchinson. Their phone number is +1.719.632.1326.
     
  8. michaelm

    michaelm 1/2 ton status

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    thank you for the info, the cs# may help as a starting point.
    has anyone tried a big alternator from a semi tractor?
     

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