Judging question...Alternator - NCRS Discussion Boards

Judging question...Alternator

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  • george culolias

    Judging question...Alternator

    It seems like the 110084 alternator my car is supposed to have, is going to be way to expensive for me to buy. My question is what is the second best option for getting the most points at judging. What about buying a 68 1100750 alternator? Or should I just buy whatever Delco sells now. Thanks judges!
  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43193

    #2
    Re: Judging question...Alternator

    George-----

    I'm not a judge but, perahps, I can provide some useful information, anyway.

    First of all, you can't use a 1968 alternator. 1968 used an external regulator type alternator and that can't be easily retrofitted to your car. It's moot, anyway, because the 1968 DN-series alternator configuration would be totally incorrect for a 1969, so that would be the last thing that you'd want to do.

    Original 1969 Corvette alternators are just about the most difficult of all alternators to locate and, without a doubt, about the most expensive to buy. Some of the alternator part numbers are near-impossible to find.

    The 1969 to late 1971 alternator drive end case configuration was unique to these years. It is the "full open" case configuration with 5 ribs. The 1969 alternator split ring (rear) end case configuration is unique to 1969 alternators. If you could obtain an alternator which had the correct drive and split ring case configurations, regardless of part number, that should be the "second best thing" from a points perspective. However, as I mentioned, ANY 1969 alternator cases are difficult and expensive to find. "Third best", I suppose, would be having at least one of the cases halves correct.

    Any 1969+ 10 SI series alternator will fit your application providing that it is "clocked" correctly. The "clocking" is easily reset for any alternator.
    In Appreciation of John Hinckley

    Comment

    • george culolias

      #3
      Thanks Joe but are you saying?

      To take any correctly dated 69 vette case and swap the internals with what I have now? There is a 42 amp 1100859 on ebay now, would that work or are these cases different sizes and configurations?

      Comment

      • Joe L.
        Beyond Control Poster
        • February 1, 1988
        • 43193

        #4
        Re: Thanks Joe but are you saying?

        George------

        From a functional perspective, all 69+ 10 SI cases are interchangeable. So, you can use the internals from any 10 SI, the one you have now or otherwise, and swap them into any other 10 SI case. If, for example, you currently have a 10 SI alternator of any "pedigree" with, say, a 61 amp rating, you can swap these internals into the case which originally contained a 42 amp unit. Presto, you've got a 61 amp unit in a case that originally held a 42 amp unit.

        Actually, the only real difference between 37/42 amp 10 SI alternators and 55/61 amp units is the stator; the rest of the internals are functionally the same (although some pieces may APPEAR different). So, to convert any 37/42 amp 10 SI alternator to 55/61 amp, all you need to change is the stator.
        In Appreciation of John Hinckley

        Comment

        • Mark #28455

          #5
          try Pontiac or Olds or heavy truck

          Some of the 1969 and 1970 vintage pontiacs (formula, GTO) and Oldsmobiles (442) had the same style case as the Corvette in addition to some heavy trucks.

          If memory serves me correctly, the trucks even used the 882 or 884 units! So, find an old truck yard and look in the back of the sheds or wherever else they piled the alternators.

          I bought an Oldsmobile 1970 unit on e-bay last year for $9.99 plus $15 shipping. The case is correct as a spare for my 1970 car. I wouldn't waste my money on a Corvette part of the wrong amps for my application as it will still cost well over $200 and you'll still lose points for having the wrong part number for your car. You would do better on a points per dollar basis to get a cheaper Olds or Pontiac part and get some other parts with the $ saved. You can easily swap it out later if you win the Powerball and can finally afford a correct 884 part (or somebody comes out with a correct repro - which may happen soon given the potential $$$ to be made!)

          Mark

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