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Message: <blockquote data-quote="pidjones" data-source="post: 228184" data-attributes="member: 3026">I did a short experiment on my '79 GL1000 with Ford TFI modules triggered by the points. They modules handled dwell and coil current, placing only tiny current across the points. I felt this system would give great performance (well controlled dweel and long point life) but did not realize that the regulator had failed and I was feeding the system at up to 18 volts! Worked great for about 100 miles, but then became erratic.  After replacing the regulator with a reg/rect, charging voltage wasperfect and luckily battery and lighting survived, but tge TFIs remained erratic once warmed up. I pulled them and went back to straight points, which was quite easy as I had designed the system to permit a quick roadside swap requiring only a screwdriver to remove the left side cover.Point being - there are many coil driver packs for cars out there, triggered by various sensors (my Ford push-start TFIs by the points opening). Some, such as the push-start TFIs control dwell themselves, others such as later TFIs and GM modules have inputs for ECU dwell control.</blockquote>