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  1. #1
    Junior Member RacinAlt's Avatar
    Join Date
    Jan 2007
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    Bentonville, AR
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    3

    White
    1989 Mazda RX-7 LS1

    LS1 Self Regulated Alternator? or PCM Bypass

    I have a LS1 swapped RX7, and I have obvisouly misssed something......

    It is a 2000 LS1, with stock computer, and 1 wire alternator. But the alternator is not charging, so obvisouly the excitor wire isn't doing its thing.

    The car is a pourpose build race car. So I am looking for a simple answer.

    The question is instead of tracking down my issue is there a Self Regulated Alternator out there that fits the LS1, or are there any "Tricks" to bypass. I figured anyone that is running a carb since there is no PCM would probably know exactly what I was talking about.

    Thanks for your help.

    Bobby Jasan
    www.bobbyjasan.com
    bobby@bobbyjasan.com
    #60 FP '87 Mazda RX-7, #57 EM '89 Mazda RX-7 LS1, #60 ES '92 Toyota MR2, '73 Mazda RX-3
    '95 Nissan Altima SE, '04 Audi S4, '08 GMC Sierra 2500 Dezel, '97 Chevrolet 1500 LS, '91 Ford Escort
    Last edited by RacinAlt; 12-06-2009 at 06:01 PM.

  2. #2
    Member
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    Aug 2005
    Location
    Tulsa,OK
    Age
    43
    Posts
    914

    Quick Silver
    2002 Z06

    I think this is the info you need
    http://www.v8rx7forum.com/v8-rx7-tec...r-upgrade.html

    That board has TONS of info on exactly what you are into


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  3. #3
    Junior Member RacinAlt's Avatar
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    Jan 2007
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    Bentonville, AR
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    White
    1989 Mazda RX-7 LS1

    sweet!

  4. #4
    Senior Member Cutlass's Avatar
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    Apr 2008
    Location
    Madison, WI
    Posts
    7,006

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    I got this info from GM
    The generator uses only two connections-battery positive and the L terminal, in addition to the ground path through the generator bracket. Use of P, I, and S terminals is optional. The P terminal is connected to the stator and may be connected externally to a tachometer or other devise. The I terminal can be connected directly to battery voltage to power the generator instead of, or in addition to, the L terminal which must be stepped down. This S terminal may be connected to an external voltage source, such as voltage near the battery, for voltage control. If the S terminal is not used, internal generator voltage is used for control.

  5. #5
    Senior Member bigrondownhiller's Avatar
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    Feb 2006
    Location
    Orange County, NY
    Age
    48
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    2,693

    always dirty
    2013 Ram 2014 Caddy ATS

    On the 1 wire alternator on my boat you have to rev the engine a little to excite the regulator. What brand of alternator do you have?

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