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Timing an electronic Mallory dostributor

Discussion in '40- & 55-Series Tech' started by nat869, Aug 14, 2005.

  1. nat869

    nat869

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    I have a 1975 FJ55 with a stock F motor. I just got it and it has a Mallory electronic distributor. I have never delt with one before and was wondering how to time it. There seems to be no way of disconnecting the advance. Thanks for any help.
     
  2. CruisinGA

    CruisinGA

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    let it warm up, hook up a vacuum guage to manifold vacuum.

    Loosen retaining bolt at base of distributor, with engine idling, rotate distributor for maximum/ most consistent (non flucuating) vacuum.

    The advance should not have any appreciable effect at idle. If it is a vacuum advance simply unplug it and plug the hose.
     
  3. nat869

    nat869

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    It has no vacuum advance, just 3 wires going to it. Check it by vacuum?
     
  4. CruisinGA

    CruisinGA

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    Engine vacuum is a good indicator of static engine timing, among other things.
     
  5. dfmorse

    dfmorse

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  6. ken_79-fj40

    ken_79-fj40

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    I have a mallory on mine with no vacuum advance. But mines got points. I set my timing to the bb on the flywheel, just like stock and it seems to be fine. Mine gets to about 30-32 degrees advance at around 34-3500rpm. Vacuum advance sure would be nice though. I may get another toyota (maybe a non-usa one) distributor when I do my engine rebuild.