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Dick Carne · 03-11-2012, 05:52 PM

Over the years I've used generators, 6 and 12-volt alternators. But at least for me, and after almost 50 years of playing with these old cars, I prefer the 12 volt alternator and electrical system. At night with a 6-volt system, I noticed that the lights would dim while waiting at traffic lights and stop signs, not to the point of "going dark", but enough that it was noticeable to me unless I ran the RPM's up instead of the standard idle. And while I am not as concerned with my ability to see long distances (over-driving your lights), I am concerned with other cars' ability to see me.

As has also been noted, a less than good ground is not as noticeable with a 12-volt system. As a side benefit, the faster spinning starter usually means that the engine starts with just a fraction of the starting time, often just a touch once the car is warm. That being said, either system will work fine if you have good connections and maintain your electrical system - the 12 volt system just allows more latitude. Just my opinion though.

03-11-2012, 05:52 PM	#7
Dick Carne Senior Member Join Date: May 2010 Location: Fayetteville, Georgia Posts: 467	Re: 6 Volts versus 12 Over the years I've used generators, 6 and 12-volt alternators. But at least for me, and after almost 50 years of playing with these old cars, I prefer the 12 volt alternator and electrical system. At night with a 6-volt system, I noticed that the lights would dim while waiting at traffic lights and stop signs, not to the point of "going dark", but enough that it was noticeable to me unless I ran the RPM's up instead of the standard idle. And while I am not as concerned with my ability to see long distances (over-driving your lights), I am concerned with other cars' ability to see me. As has also been noted, a less than good ground is not as noticeable with a 12-volt system. As a side benefit, the faster spinning starter usually means that the engine starts with just a fraction of the starting time, often just a touch once the car is warm. That being said, either system will work fine if you have good connections and maintain your electrical system - the 12 volt system just allows more latitude. Just my opinion though.