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LS1 Tachometer

This is a discussion on LS1 Tachometer within the General Help forums, part of the LSx Technical Help Section category; Hi Guys,, I'm wondering if anybody can help me with this: I have a VDO Xtreme Performance Tach Gauge and ...

  1. #1
    Junior Member
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    LS1 Tachometer

    Hi Guys,,

    I'm wondering if anybody can help me with this:

    I have a VDO Xtreme Performance Tach Gauge and would like to install it on a LS1 engine

    but some one told me that its difficult becouse the LS1 ignition is Coil on Plug (COP).

    So any help in installing this tachometer will be appreciated

  2. #2
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    Not sure how to do it, but it's possible - seen LS1's with aftermarket tachs and shift lights. Maybe tap into the Engine Speed (Tach) Output Signal wire coming off the PCM? Here's the pins/colors for a 2K model for example, other years may be different: www.ls2.com/boggs/torques/00pinpcm.htm Don't know if this helps or not...

  3. #3
    Member 89LX's Avatar
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    Navy
    2000 Z28 M6

    Pcm

    I installed the Stewart Warner Ultra Shift Light and wired to the PCM. Not sure on your type tach but I would think the instructions would indicate one way or the other.
    2000 Z28 M6, SLP Lid, SLP Bellows, SLP UD,
    P&P Maf, TB By-Pass, PS Shorties, LS6 Intake, FAST 78mm TB, Hooker CB, Hurst Billet, Front Tower Brace, small 218/218....527/527....114 cam.
    337rwhp/348rwtq

  4. #4
    Member 89LX's Avatar
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    Navy
    2000 Z28 M6

    VDO Gauge Installation and Troubleshooting Guides

    Check this out. I believe your answer is there.
    VDO Gauge Installation and Troubleshooting Guides:
    http://www.egauges.com/Inst_PDF.asp

  5. #5
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    Tnx alot , i'll try your sugg..'s

  6. #6
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    for f-bodies, you connect the tach lead to the #10 white wire coming out of the PCM.

  7. #7
    Sideways to da next light redline's Avatar
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    black
    2000 trans am

    Yes its the white number 10 wire from the pcm. I was surprised to learn just how inaccurate the stock gauge really was. Its off 100 rpm at idle and as much as 300 rpm at 4000 rpm.

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