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those who have installed a 3g alternator and have an electric fan
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Thread: those who have installed a 3g alternator and have an electric fan

  1. #1
    Senior SCH Member
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    Oct 2002
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    those who have installed a 3g alternator and have an electric fan

    i just installed a 3g 130 amp alternator on my mustang. always before when i would kick the fan on you could watch the needle drop some on the volt meter on the dash. i figured that once i had the 3g on there that the needle wouldn't even budge now but it still moves down some until the fan gets up to speed. is this normal? it seems to be able to keep up now at least. always before all i could run with the fan was the low beams, nothing else. at least now i can run the fan on high and the lights on.

  2. #2
    SCH Member
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    Apr 2003
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    Sounds pretty normal to me. Mine has always dipped when I load it and recovers quite well. It tends to dip at idle with the headlights, a/c, etc. all on at one time too. I have never killed a battery or experienced any problems because of it.
    1989 LX Coupe
    Novi 1000, FMS/Bosch 42#'s, GT40 irons, GT40 intake, Pro-M 80mm MAF, 65mm T/B, 1.7 rockers, stock cam, MAC longtubes, MAC prochamber, flowmasters welded in stock pipes, T5z, 3.73 gears.

    Best ET: 12.55
    Best MPH: 115.2

  3. #3
    Senior SCH Member
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    thats good to know. i was hoping that i didn't get ripped off on ebay.

  4. #4
    Senior SCH Member
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    Mine does the same thing and I have the 200amp 3G alternator...

  5. #5
    Senior SCH Member
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    thanks guys. i feel better now.

  6. #6
    SCH Moderator 5150 LX's Avatar
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    Most fans will pull a huge start up amperage and then settle back down, I would not sweat it :D
    Quote Originally Posted by Kato Engineering
    you just like the metric system because when you talk about your organs length, a three digit number seems to you longer than a one digit number....
    Dart Block 331 and No Power Adder, currently in pieces...... :weird:

    Used to run 6.90 @ 100.4 mph in the 1/8th

  7. #7
    SCH Moderator Hustler's Avatar
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    same here.

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