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Diesel Tach

Discussion in '1982-Present GM Diesel' started by savagek5diesel, May 6, 2004.

  1. savagek5diesel

    savagek5diesel 1/2 ton status

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    Hey guys, I saw that autometer makes a 5" in dash tach now and i was wondering if anybody knows if us diesel guys could use it somehow?
     
  2. BlazerGuy

    BlazerGuy 3/4 ton status

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    Autometer has offered the in-dash tachs for a long time. But I don't think they will work with a diesel engine.
    ATM-2888(summit part#) is a diesel tach. It has a small inductive probe that straps on the alternator to pick up the signal. I don't know if it's indash or what though.....
     
  3. BlazerGuy

    BlazerGuy 3/4 ton status

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  4. BlazerGuy

    BlazerGuy 3/4 ton status

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  5. BlueBlazer

    BlueBlazer 1/2 ton status

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  6. Diesel Dan

    Diesel Dan 1/2 ton status

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    Do a search on this topic.
    I gave part #s for a 3 5/8" Stewart Warner diesel tach that is carried by CarQuest. The pickup used a mag sensor off the flywheel teeth. Way more accurate than the alternator style.
     
  7. Steve_87K5

    Steve_87K5 1/2 ton status

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    In tearing down several 6.5s (discarded ones from dealer dumpsters) I found that some were equipped with timing teeth on the front of the crank (4 teeth). These used the short hub style harmonic balancer.

    If you are inclined to make your own tach circuit, check out the ATS610LSA sensor (hall effect). I'd like to use this sensor, and appropriate circuitry to make the OEM gas tach work in my '87 with the 6.5

    I think there were 2 different ESS methods used. One had a module mounted on the vacuum pump (California emissions) and another used a hall effect sensor on front of crank. Maybe others, not sure.
     

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