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Spark plugs #45 Motorcraft?

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  • Gold Bird
    Experienced
    • Nov 9 2007
    • 357

    Spark plugs #45 Motorcraft?

    I am sure this has been talked about before but was wondering if the Motorcraft #45 is a good heat range to use. Have checked mine and the color looks very light tan, almost looks like my carb might be a little lean. Thanks for the info, no problem but want to have the right plug for my Pertronix system. Plugs are gapped at about 35.
    sigpic1960 Gold Bird, original owner since new. tbirdregistry #3158
  • JohnG
    John
    • Jul 28 2003
    • 2341

    #2
    those work well for me. Light tan sounds like a good appearance.

    How does the car start and run?

    Did you upgrade the coil when you put the Pertronix unit in?

    John
    1958 Hardtop
    #8452 TBird Registry
    http://tbird.info/registry/DataSheet...r~equals~8452)

    photo: http://www.squarebirds.org/users/joh...d_June2009.jpg
    history:
    http://www.squarebirds.org/users/johng/OCC.htm

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    • Gold Bird
      Experienced
      • Nov 9 2007
      • 357

      #3
      Starts fine, runs a little rough at first then gets smooth later once warm. I do have the Pertronix coil too, as mentioned before I have about 10volts at the coil, but when you rev the engine the generator puts out about 12.5 at the coil. Think I should run a new wire with a full 12volts because the resistor wire must still be there.
      sigpic1960 Gold Bird, original owner since new. tbirdregistry #3158

      Comment

      • tbird430
        Super-Experienced
        • Jun 18 2007
        • 2648

        #4
        With that, more modern, Petronix system you should be able to open up the gap some too!!

        sigpic
        The 1960 Ford Thunderbird. The WORLD'S most wanted car....

        VTCI Member#6287.

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        • JohnG
          John
          • Jul 28 2003
          • 2341

          #5
          You should check with Pertronix as to whether you should retain the resistor wire or not. They have a support page at http://www.pertronix.com/support/contact/default.aspx

          It would be worth experimenting with .042 or .045" gap. I have been able to run gaps as wide as .050" with a better coil and wires.
          1958 Hardtop
          #8452 TBird Registry
          http://tbird.info/registry/DataSheet...r~equals~8452)

          photo: http://www.squarebirds.org/users/joh...d_June2009.jpg
          history:
          http://www.squarebirds.org/users/johng/OCC.htm

          Comment

          • KULTULZ

            #6
            Originally posted by Gold Bird

            Motorcraft #45


            Isn't that a current AUTOLITE (HONEYWELL) PN?

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            • tbird bob
              Newbie
              • Feb 18 2009
              • 10

              #7
              pertronix

              I have been running a pertronix magnet in my dist. for about 11years. I also have their coil. The coil has a resistor in it. According to the instructions you do not have to disconnect your resistor wire. I have been using Autolite copper 45's gapped at 35 with never a problem. I have a 135 amp G.M. altenator. I get just under 15 volts. The windows almost go through the roof. This whole set up costs about $300. Probably the best $300 I have spent on the car. I take that back. It ranks right up there with a 3 row radiator and a 6 blade after market fan. If anything, it probably does not run hot enough. I have never ran at over 180 degrees in the So. Ca. heat. I have never idled at long periods of time though. I don't do parades or cruises. I know what I have and no need to show it off in that manner.

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