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Hey guys
any idea what the voltage should be on the coil
side of a ballast resisitor in a
1982 wb ute
cheers
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WB didn't have a ballast resistor factory standard, they had a full 12V supply to the coil.
Dr Terry
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The resistor is only for dropping the voltage that runs through the points to help them live longer, if you have the electronic ignition there arent any points and therefore no need for the resistor.
You only have to be in front at the end of the race. |
You only have to be in front at the end of the race. |
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hi guys
sorry i should have given you more information
its running a 1973 308 with a Mallory unilite electronic dizzy
it had a ballast resisitor in before i fitted the Unilite and the spec sheet for the unilite said to keep running the resisitor.
its only got 4volts comming out the coil side of the resisitor
i am running 12volts to the coil at the moment and the car is running well but the mallory spec sheet said it can damage the dizzy if left for too long
cheers
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The usual voltage was about 9V.
You only have to be in front at the end of the race. |
You only have to be in front at the end of the race. |
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OK.
You don't mention what type of coil you are using, as that has a large effect of the current draw & therefore the voltage drop across the resistor.
I ran a Mallory Unilite for years on my drag car & they do have a problem with dissy module failure. I found (after several such failures) that while the voltage at the coil at idle may be 9 volts, this increases as the RPM increases. What I did was to run a separate resistor just to supply the dissy module. A 27 ohm 5W ceramic resistor did the job. The voltage is now the same at all RPM, with no risk of module failure from over-voltage.
Keep whatever resistor came with your coil & make sure it only supplies the coil.
Dr Terry
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The best argument against democracy is a 5 minute conversation with the average voter. |
If at first you don't succeed, just call it Version 1.0 |
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