Posted by james rumph on March 30, 2008 at 10:22:46 from (24.192.121.186):
In Reply to: 10 ohm resister posted by 160dan on March 29, 2008 at 19:49:35:
Food for thought "auto" coils Do Not have a ballest resister built in like tractor coils.
Tractor coils wether 6v or 12v have them internal so a external ballest resister is not needed. If you run a hotter after market coil MSD , Accel etc etc then the external ballest is required. It will run fine but you will find your coil getting very hot.
When i went to 12v neg ground i never needed to install a diode with my generator.
If it has a alt then it should be diode protected internaly that is also why you no longer need the external voltage regulator.
A diode in line is just fixing another problem " voltage fed back".
If it has a old stile regulator then open it up and set the correct gap and the problem is solved.
With the gap to big the points don't close grounding it out allowing voltage to contune threw keeping it running.
With the rpm lower the current isn't as high so they close .
If this has a Alt then this doesn't work in this case.
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