ANSWER: You surely already knew this George right ?? However for anyone who may not:
One reason many old tractor and car makers for years on 12 volt cars/tractors used a 6 volt coil PLUS an external series ballast resistor PLUS a ballast by pass when cranking function
WAS TO IMPROVE COLD WEATHER STARTING
How it works is ONLY when cranking, if so equipped, a ballast by pass system applied non ballasted battery voltage to the 6 volt coil for a stronger spark VERSUS if the reduced battery voltage were applied to a 12 volt coil. In cold weather battery voltage drops significantly when cranking so say 10 11 or so remaining volts (when cranking) on a 6 volt coil can allow an engine to start versus the same voltage was applied to a 12 volt coil GOT IT ????????????
SOOOOOOOOOO thats why so many companies used a 6 volt coil plus a ballast and ballast by pass while cranking system on 12 volt tractors for years TO IMPROVE COLD WEATHER STARTING
HOWEVER NOOOOOOOOOOO George you dont need it,,,,,,,I wouldnt mess with it,,,,,,,,its simpler to just use a 12 volt coil no ballast required,,,,,,,,,,,,you likely would never notice any difference,,,,,,,,,,,of course it can only improve cold weather starting iffffffffff you have a ballast by pass feature WELL DUH,,,,,,,,,,,,,,YESSSSSSSSSSSSS ITS SIMPLER But this is ONLY to explain why and how manufacturers did that for years and indeed it could help in cold weather
You dont need it, I wouldnt mess with it either, just use a 12 volt coil no ballast required KISS
There ya go George hope this helps, answers your question, and lets you know why it was done for years even if its NOT for you and indeed simpler to use a 12 volt coil and be done with it lol. Hey if the engine is good with a good full charged battery theres likely little to no difference !!!!
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