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Thread: 57 special generator to alternator conversion

  1. #1
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    57 special generator to alternator conversion

    Just got my first project. I know little to nothing about what i am doing. What kind of alternator do i need for a conversion?

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    The alternator which enables the easiest conversion is the Delco internally regulated type 10-SI. These were used on most GM cars from the mid 70s through the mid 80s. Any decent parts store should either stock them or be able to order one on short notice. They are also readily available online.

    Detailed instructions for the conversion are available here:
    http://www.rowand.net/Shop/Tech/Gene...Alternator.htm

    This page is also worth looking at, because it explains about the clock position of the plug-in connector and will be of help when you run into a clueless partsperson:
    http://www.madelectrical.com/electri...elcoremy.shtml

    If you need additional info please post again.

    Ray

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    one more thing..

    The Buick's up until 1960 had a starter switch on the carburetor to start the engine and a relay that worked with it. The starter relay got it's ground through the generator so that once the engine is started and generator was charging the starter would not engage. When switching to an alternator you will have to ground that relay wire, you still have a neutral safety switch so no way that the starter will engine when driving the car.

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    Unless your increasing the load on the electrical system,stick with the generator.
    JAMIE MCCLINTON
    STARTER/ALTERNATOR/GENERATOR REBUILDER SINCE 1979
    selling buick mini starters & alternators
    startncharge@rocketmail.com
    65 Special convertible
    69 Special Deluxe
    Lost to garage fire:
    69 cali GS
    72 Suncoupe

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    Thanks, this helps a lot
    Quote Originally Posted by 65specialconvert View Post
    Unless your increasing the load on the electrical system,stick with the generator.
    I have to charge my battery every couple of weeks, what would should i check first?

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    dead battery?

    Start with checking for a draw and then check the charging system, all basic mechanic stuff that you can read about on the internet. The generator will do a good job with a stock car, if you are adding a radiator cooling fan, AC or a monster stereo better step up to an alternator.. I love the look of the generator on a vintage car but they need rebuilding often, the brushes wear out faster because all the 35 amps of output goes through them, an alternator brushes have only a few amps going through them so they last 100,000 miles.

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