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Tachometer help needed

Discussion in 'Technical Q&A' started by solly, Jul 31, 2004.

  1. solly

    solly Formula 3

    Jun 2, 2001
    1,148
    Westchester NY
    Full Name:
    Dr. Steven S.
    Just put a Crane Cams optical trigger kit (trigger,electronic controller and high performance coil) into my '74 dino 246. It runs like a clock, but the tachometer is way off (showing too high). We contacted Crane's and they suggested trying a few different resistors, so off we went to Radio Shack and bought a bunch of different ones. finally found one that seemed to work (tach in car matched mechanic's tach thru rev range), but as soon as I got home it was way off again.

    Anyone else do this conversion, and if so, did you have tach problems and/or solutions?
     

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