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points tach with HEI

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Chris Demartini, Jun 28, 2001.

  1. Chris Demartini

    Chris Demartini 1/2 ton status

    Joined:
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    Location:
    Dumont NJ 07628
    <font color=blue>I took my tach out today and found a small adjustment screw in the back on the top. Can I adjust this screw to make the tach more acurate? It's the original (71) tach but I have HEI ignition. TIA</font color=blue>
     
  2. Chris Demartini

    Chris Demartini 1/2 ton status

    Joined:
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    Location:
    Dumont NJ 07628
    <font color=blue>Nevermind, it is how you adjust it. I just did it now. Turned the screw until the tach matched the numbers on my timing light. Yes, its acurate through the RPM range too [​IMG]. Heres a picture of the screw (pen pointing to it)
    <A target="_blank" HREF=http://www.off-road.ws/images/users/chrisd71k5/tach_screw.JPE>http://www.off-road.ws/images/users/chrisd71k5/tach_screw.JPE</A></font color=blue>
     

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