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By paul2748 - 5 Years Ago
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On my 312 powered 54 Ford, I have an internal resistor coil. It has served and is still serving me well. I want to get another as a spare as I am gong on a fairly long trip. I went this way because it was easier than setting up an external resistor when I rewired the car with an aftermarket kit.
When I originally got the coil I didn't worry about specs but it seems to have turned out ok. But now that I am getting another one, I wonder what specs I should be looking for. The number on the coil I have are gone so I'm starting anew.
Can anyone help me out on this? As I said, the engine is a 312, later distributor (points), alternator. I see a lot on ebay but don't know which one will be okay
Thanks for any help
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By charliemccraney - 5 Years Ago
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About 3 ohm if not using an external resistor.
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By Florida_Phil - 5 Years Ago
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FYI I am running a 1957 Ford distributor with a Pertronix I unit and no external resistor. This combo requires a 1.5 ohm coil.
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