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jpnovak jpnovak is online now
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Join Date: Apr 2000
Location: Austin, TX
Posts: 7,145
Since you have an MSD ignition I would replace the whole insert with a Crank Optical. I did this on an SC distributor I made into a twin plug unit. Worked great. The plus side is that you have a 12V output square wave that is much less susceptible to noise unlike the mV scale coming from the coil and spider arm.

Are you sure you don't have a break in the green wire somewhere that separates when hot? Are you getting cut out?

A friend had a distributor with too much vertical play. The distrubutor would float and there would not be enough overlap between the spider and pickup coil. This caused a low voltage signal and lots of cut out. It was not easy to find that one.
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Old 04-03-2014, 07:05 PM
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