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  #1  
Old 07-11-2010, 04:54 PM
Gold Bird Gold Bird is offline
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Default 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.
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Old 07-11-2010, 07:33 PM
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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
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Old 07-11-2010, 08:50 PM
Gold Bird Gold Bird is offline
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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.
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Old 07-12-2010, 09:40 AM
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Lightbulb

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

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Old 07-12-2010, 10:30 AM
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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.
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  #6  
Old 07-12-2010, 12:06 PM
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Originally Posted by Gold Bird View Post

Motorcraft #45


Isn't that a current AUTOLITE (HONEYWELL) PN?
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Old 07-13-2010, 02:17 AM
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Default 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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