The Stovebolt Site Forums The Shop Area The Electrical Bay 6V alternator

Hey 4ONTHEFLOOR - you mentioned in another post that you are running a 6V alternator (GM 10SI). Tell me more about this. Was this a custom or is someone selling these? Are you using the narrow belt?

Best Regards,

They are special built, If you will e-mail me your snail mail address I will drop you some information in the mail that explains the how and why and related.....Thanks Randy

I used a conversion kit from http://www.alternatorparts.com and made a 30A 6V alternator out of a spare Delco 10si 60A 12V alternator that I had, although I have not actually tested its current output it does charge at idle with the lights on and the heater blower running, which is all I care about. The voltage regulation is really good. I mounted it by flipping the generator brackets backwards and the pulleys lined up. I kept the wide vee of the 216 by using the old pulley that was on my generator- you just grip the circumfrance of the pulley with a pipe wrench and unscrew the nut and swap them- the threads and shaft size are the same. I kept the original fan on the alternator- they were separate pieces. I noticed that on my other 12 volt generator I have as a spare that the pulley and fan are one piece. You can also buy new pulleys that are differant widths. I made the alternator the one wire type by connecting the ignition terminal to the battery. I am quite happy with it but if you want a 60 amp alternator you have to either start with a heavy duty 15si alternator (120 amp) or get a purpose built one. The original generator capacity was only about 40 amps anyway so a 30 amp unit is fine, at least for me. If you use a smaller diameter pulley on the alternator then you will get more current at idle. You won't be able to overrev an alternator with a stovebolt engine.