Thread: For Don Shilady

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Thanks all, there are several good suggestions there. In particular 36Sedan shows that a static reading at the (+) coil terminal need not have the engine running. During the week I hope to learn from speedway how their ignition switch can have different amp readings for the "start" and "run" positions.

See Universal Ignition Switch - Speedway Motors, America's Oldest Speed Shop

That is the ignition key-start I have. There must be a resistor in there somewhere to change the limiting amperage. I will call Speedway next week to get an explanation how the two positions differ internally.

The diagram from 34_40 shows the resistance inside the coil which is know to be 1.5 ohms. Thanks also for the suggestion on mounting a ballast resistor if needed. "IF" my key-start has some sort of internal resistor that would explain why I have not needed one till now and may not need one for the XR1. All considered, I want to change over to the XR1 since the magnetic signal from the metal octagon on the shaft looks sturdier than the floppy plastic disk in the Pertronix kit.

Don Shillady
Retired Scientist/teen rodder