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Old 06-27-2021, 07:51 PM
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ronstory ronstory is offline
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Welcome to the forum.

The resistor normally looks like a long lego made out of ceramic and having wires or terminal on it. it usually measure out 1.5-2.0 ohms-ish. To see if you had one, just follow the wires upstream from the + terminal of the coil. If you don't have one, with points it would likely "still work" but you would be stressing the coil and the rest of the electrical components.

When you flip to the IE, the total current cannot exceed 4 amps for the Ignitor module in a 4 cylinder motor configuration. Also, the coil from Moyer (MMI) is actually seems to be more like 3.8-4.0 ohms which reduces the coil current.

If you use an aftermarket like NAPA IC14SB, it's roughly 3.25 ohms so you can be at or over the limit of 4 amps at idle with a ~14V set alternator. My recommendation is just get the MMI coil, it only $10-15 more and you won't need to worry about it. Or just add a ballast resistor with the coil you have.
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Ron
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Last edited by ronstory; 06-27-2021 at 07:53 PM. Reason: format, typos, etc
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