if you're keeping the 6V battery, use a 6V coil, the 6V system doesn't use ignition resistance, internal or external, and I don't know that the internally resisted 12V coil would supply enough power at the high voltage side with 6V, it's designed to reduce the 12V to about 9V so it might not work with 6V at all
Bill
Thanks Bill. My '52 Chevy 3100 is still a 6Volt system - it came with a ceramic ignition ballast/resistor. One wire from the ignition on one tang, one wire from the positive side of the coil on the other tang - and I guess the other wire is a ground to the engine block. Drove around with it for about 2 weeks no problem. A couple of days ago it wouldn't start, the starter wouldn't crank, no spark out of the plug. I was able to replace it with a MSD 9 ohm? ballast resistor and everything worked like a charm until this morning (That was yesterday). The engine wouldn't turn over - the lights were extremely dim. I was able to jump the battery and it cranked right over. Took it home and put in a 6 volt CAR battery from Pep Boys (they had one, Sears had golf cart batteries). I can toss the resistor right? The coil I have is a Delco-Remy, I suspect it's a 6 volt - I don't know though. The car starts very roughly, and the lights are even dimmer. What should I be considering now? Thanks again.
