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Thread: Upgrade electric system, alternator, Fusible Links, remove External Voltage regulator

  1. #1
    '75 280z tamo3's Avatar
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    Default Upgrade electric system, alternator, Fusible Links, remove External Voltage regulator

    I'm working on upgrading electrical system.
    My car is '75 280z.

    My goal is :
    • Replace Alternator to CS144 with removing external voltage regulator.
    • Remove Shunt.
    • Add extra fuse with install Maxi-fuse box. (75 has only 2 fusible link)
    • Add ignition relay (75 does not have it)
    • Swap Ammeter and Voltmeter



    My '75 280z has only 5 wire for external voltage regulator.
    When I googled, several people encounter issue for the missing #1 wire, which is green/red colored.

    Blues web site is always helpful. There is answer for this.
    HELP 75 Alternator swap

    I just create illustration for this solution.
    Click image for larger version. 

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    I will keep update the progress.
    Last edited by tamo3; 10-31-2014 at 12:06 AM.
    '75/280z

  2. #2
    '75 280z tamo3's Avatar
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    You can grab CS144 alternator from Cadillac DeVille. Try to find 92-94 in the junkyard.

    Click image for larger version. 

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    The hardest part is to remove pulley. There is taper collar that prevent from removing the pulley.
    CS144 pulley removal - tapered collar type - International Full Size Jeep Association
    Click image for larger version. 

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    I could not remove the the taper collar, so I grinded to remove the pulley.

    Just follow instruction video to rebuild alternator.
    Part 1


    Part 2


    Paint the cover too.
    Click image for larger version. 

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    completed.
    Click image for larger version. 

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    '75/280z

  3. #3
    Registered User EuroDat's Avatar
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    Hi Tamo,
    Nice mod and good clear instruction. Looking forward to seeing finished/installed pics.

    Do you have the specs for the CS144?

    Cheers Chas
    Chas
    5/77 280Z HLS30 403100 with some modifications
    Original colour: 305 Light Blue. The PO changed it to Red

  4. #4
    '75 280z tamo3's Avatar
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    '75/280z

  5. #5
    '75 280z tamo3's Avatar
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    Shunt!
    I searched on web, but I could not find any good information about '75 280z shunt.
    I learn some earlier model has shunt inside of the car (maybe 240z, 260z?) later model is in the engine bay.

    This is the shunt!
    Click image for larger version. 

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    '75/280z

  6. #6
    '75 280z tamo3's Avatar
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    Voltmeter, Ammeter wiring comparison

    75 Ammeter
    Click image for larger version. 

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    76 Voltmeter
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    77 Voltmeter
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    78 Voltmeter
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    '75/280z

  7. #7
    '75 280z tamo3's Avatar
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    ammeter
    Click image for larger version. 

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    voltmeter
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    connection comparison
    Click image for larger version. 

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    '75/280z

  8. #8
    Registered User rossiz's Avatar
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    interesting post - but i'm still a little fuzzy on why the switch to this particular CS144 model.
    the "performance curves" graph seems to start at about 1,200 rpm, and i don't know what the pulley ratio is in relation to the crankshaft, so i'm not sure if this alternator kicks in sooner or provides an overall greater output or what...

    interested in finding out though!
    '78 280z - Daily driver/work in progress...

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