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Thread: 3G Upgrade

  1. #1
    FEP Senior Member 9DBlackMagic's Avatar
    Join Date
    Sep 2006
    Antioch, California

    Default 3G Upgrade

    I was wondering if I can do a 3g alternator on a 81 Zephyr 3.3l if I need to change it I might as well upgrade while I'm at it.
    157 HP @ 4200 RPM
    240 ft/lb @ 2400 RPM

    "Yeah Baby Feel That Pure Power"
    Is a Mustang With Hips And Class

  2. #2
    FEP Power Member
    Join Date
    Nov 2007
    San Mateo, CA


    In general a 3G is needed when using an electric fan and or some big amps. Normal cars should be good with a 65 amp 1G. They used to make 100 amp upgrade kits for the 1G.
    Fox Body/3rd Gen MCA Gold Card Judge
    84 SVO 24K miles, 85 Mclaren Capri Vert. 84 GT Turbo Vert.
    88 Mclaren Mustang Vert 20K miles, 89 Mustang LX Sport Vert,
    03 Mach 1 7900 miles, 74 Mustang II, 69 Mustang, 67 Mustang, 14 Mustang CS/GT,
    15 F150 FTX Tuscany, 16 F250 Crewcab, 67 Tbird 47K miles

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