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Old 03-18-2023, 10:02 AM
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lrust lrust is offline
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Default Using Points Distributor with non-factory wiring harness?

Anyone have a suggestion on how to safely wire and set up the reduced (<12V) voltage level needed for a points set up when I only have 12V available? Factory wiring harness is not available in the car and I want to use the points system to run a points compatible tach. Thx.

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Old 03-18-2023, 10:42 AM
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Easy. You use an "old school" ballast resistor. I know MSD has them.

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Old 03-18-2023, 11:18 AM
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well - I figured there was an easy answer. Thank you! I was going to get the abacus out and do some engineering calculations but that might have resulted in a car fire.

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Old 03-18-2023, 11:26 AM
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The original points wire harness had a full 12V to the coil during cranking to give a little more juice for starting a cold engine. If you have a hard starting problem a separate 12V wire from the ignition switch to the coil might be needed.

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Old 03-18-2023, 11:35 AM
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Quote:
Originally Posted by TCSGTO View Post
The original points wire harness had a full 12V to the coil during cranking to give a little more juice for starting a cold engine. If you have a hard starting problem a separate 12V wire from the ignition switch to the coil might be needed.
The R terminal on the starter solenoid was designed for that.

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Old 03-18-2023, 03:12 PM
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Or you may use the SMP RU11 resistor. It has .50 - .60 ohms at start and 1.75 Ohm while driving. No extra wire from starter needed.

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Old 03-18-2023, 06:09 PM
Goatracer1 Goatracer1 is offline
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I've always used a Mopar resistor with good luck. Use the early style. The later ones are a double resistor. You can usually get one at any good parts store for cheap money.

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