[Purdy Swoft]

I haven't read the article in Street rodder magazine . Converting the model A from six to twelve volts is really simple . The voltage of the battery that is used controls the voltage . To make things simple and appear original , I use the original unmodified generator with a Fun Projects TWELVE volt voltage regulator that mounts in place of the cut out with no mods needed for the generator. There is a difference between the six volt and the twelve volt Fun Projects voltage regulator . If the car will be used with positive ground , No mods to the original wiring will be necessary . The generator charges the battery in amps and I adjust the adjustable third brush in the generator for a maximum charge rate of ten amps . The voltage regulator allows the generator to charge on demand . In other words the generator won't charge maximum rate except when needed for the lights or other higher draw accessories . It will be necessary to either use a ballast resister at the coil or change the coil to a three OHM version for a more original look . I have run unmodified six volt model A starters on twelve volts for fifty years or more on some of my model A's with no problem . I have used GOOD original starter drives on twelve volt but it is probably best to use the modern starter drive . Old worn starter drives can fail on either six or twelve volts . Of course all of the bulbs plus the battery will need to be changed to twelve volt . Any six volt accessories will need a ballast resister . If a lot of high draw accessories are used it would be best to use an alternator . The alternator can charge higher amperage as needed with modern cars with higher draw accessories . Most of the model A parts catalogs list a one wire connection alternator to take the place of the generator .