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Buick 225 Alternator

Discussion in 'Early CJ-5 and CJ-6 Tech' started by RVSwisher, Nov 8, 2015.

  1. Nov 8, 2015
    RVSwisher

    RVSwisher Member

    Rochester, MN
    Joined:
    Jul 11, 2006
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    99
    Dropped my buick 225 into my CJ3B rolling chassis this weekend. Looking at getting the motor started to see what I have and if I need to rebuild (used motor and I don't know what its history is).

    What alternator are people running? Single wire or orignial?

    More questions to come as keep morving forward.

    Thanks

    RVS
     
  2. Nov 8, 2015
    Johns1967CJ5

    Johns1967CJ5 Sponsor Sponsor

    Northern NJ
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    I had an original motorola rebuilt for my resto to be factory correct

    [​IMG]
     
  3. Nov 8, 2015
    colojeepguy

    colojeepguy Colorado Springs Sponsor 2019 Sponsor

    At the foot of...
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    I have a 100 amp single wire on mine.
    Works much better than the factory unit.
     
  4. Nov 8, 2015
    Walt Couch

    Walt Couch sidehill Cordele, Ga. Sponsor 2019 Sponsor

    cordele, Ga.
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    If you don't know about the motor then I wouldn't worry about the alternator as of yet. If you have an old alt you can hang on there for the waterpump belt if you plan on running the engine for a long time.
     
  5. Nov 8, 2015
    RVSwisher

    RVSwisher Member

    Rochester, MN
    Joined:
    Jul 11, 2006
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    No alternator, looking a purchasing what I would run in the future.
     
  6. Nov 8, 2015
    uncamonkey

    uncamonkey Member

    Greeley CO
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    Jun 2, 2009
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    2,105
    I believe both the Motorola and Delco mount the same, one Jeep has a a Delco, and the other has a Motorola.
     
  7. Nov 8, 2015
    Twin2

    Twin2 wasn't me Sponsor 2019 Sponsor

    Virginia Beach, VA
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  8. Nov 8, 2015
    Unkel Dale

    Unkel Dale delivery on my Jeep from Ft. Campbell, Ky.

    Pittsburgh, Pa.
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    Hello
    Of course your project is yours. What you are asking is how to choose better, OK. Your first choice was that you wrote you put a 225 in a 3b, NOT oem. so you are not holding yourself to that standard, hence Walt's comment. The single wire system has fewer parts so that is simpler. You did not say you had the oem three wire Motorola system already. Always buy fewer parts. You now MUST consider what your electrical needs are going to be, super stereo system, extra driving lighting or even ground effects to figure out YOUR wattage load, ENJOY.

    I run OEM Motorola three wire external resistor set up, just like I bought it with. I forgot to answer your question. My only electrical load is my lights. IT DID NOT COME WITH A HEATER OR ELECTRICAL OR AIR DRIVER WIPERS.
     
    Last edited: Nov 15, 2015
  9. Nov 8, 2015
    Dave B

    Dave B Frankenjeep '67

    Northern Minnesota
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    Nov 10, 2009
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    492
    You're looking for opinions-- take into consideration all the above and future posts. And one specific possibility--I'm running a 12 volt Delco-Remy Model 10SI 12:00 "clock" position. If you had to ask for one, it would be for a 1977 Pontiac Grand prix, 8 cyl., 5.7 L (350R) engine w/AC and HBL (rear window defrost). I believe it to be 63 amps. This is on a Dauntless 225 odd-fire in a CJ5.
     
  10. Nov 8, 2015
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
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    Jul 18, 2013
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    I replaced my OEM (external voltage regulator) with a 63amp Delco 3 wire (10SI, internally regulated). Like the simplicity of the internal regulator, and the 3wire as one can then go to the amp light in the speedo cluster. Don't think that is possible with the one wire, but the one wire is very simple. Check out the mad electrical site posted above...very helpful for me. I think mine is clocked at 3. I don't run many accessories so 63 amps is plenty - but I would like to run some extra fog lights and thus went with the 63amp.
     
  11. Nov 8, 2015
    SFaulken

    SFaulken Member

    Renton, WA
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    May 24, 2011
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    646
    I'm using a 105 Amp 12SI on mine, Single Wire, I wanted the extra juice for lights and winch pulls. I'll be damned if I can remember what application I used to find it though.
     
  12. Nov 9, 2015
    homersdog

    homersdog Tulsa, Ok Sponsor 2019 Sponsor

    Tulsa, OK
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    100 amp 10si on mine, for the winch & kc hilites. Much better than the original 35 amp Motorola.
     
  13. Nov 9, 2015
    47v6

    47v6 junk wrecker! Sponsor

    Washington DC.
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    I just bought the cheapest one for a 1965 buick skylark. That is supposedly what my 225 came out of. It requires an external regulator. Get the single wire alternator and be done with it.
     
  14. Nov 9, 2015
    Arnold Layne

    Arnold Layne Member

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