gen to alt
 

Anyone out there do a generator to 6v alternator conversion from FIFTH AVENUE ANTIQUE AUTO PARTS. It would be for a 51 EAB flathead engine and include a change to negative ground.


See www.fifthaveinternetgarage.com

Re: gen to alt
 

If youre staying 6v you don´t have to go negative ground.
The GM alternators can be made positive ground and then you don´t have to rewire anything like am meter under dash.
What is the cost for their conversion compared to a powermaster ?

Re: gen to alt
 

If you shop around 6 volt alternators can be purchased much cheaper than Fifth Avenue. He only offers neg ground units whereas others offer pos ground as well. Regards, Kevin.

Re: gen to alt
 

I made 7 6 volt P ground alternators for my own use 20 or more years ago.
I put over 100,000 miles on one in mostly weather over 85 degrees and never
had a problem with any of them. I put the electronics on the rear cover plate
and is plug in if I ever have to replace. I made a spare cover to carry with me
but haven't needed it. I also used a large stock Ford pulley and don't discharge
at idle with the lights on. I can adjust the maximum output with a screw driver
through a hole in the cover while it's charging. I bought new parts from a
rebuilder buying only the parts I needed. They were Nippendenso parts. You can see the large pulley's so they don't have to be super tight. The cheap way
is the GM 12 volt alternator, change the polarity of the diodes and replace the stator with a 24 volt one and you can adjust the output to 7.3 volts. It will charge at idle with a large pulley. G.M.

Re: gen to alt
 

G.M.'s solution looks slick and if I had the know-how that's what I would do. Sadly I don't have his know how and the people in my Lincoln club warned me I didn't want to go 12v or Negative ground due to some of the more odd-ball accessories in my vehicle. I was lucky and was able to obtain a GM 10si alternator that had been converted to 6v positive ground/single wire/self exciting by someone who had intended on using on their tractor. $40 and a slingshot from speedway later and I couldn't be happier. And should I decide to go show-car somewhere way down the line I still have the stock generator on a shelf in the garage.

Re: gen to alt
 

Hi GM, Im not sure why you keep mentioning your skills with the building of the above alternators because most guys would not be able to build one of those in a fit. Unless of course you are willing to build some more of those and make them available for others to purchase. Very nice job all the same. Regards, Kevin.

Re: gen to alt
 

Contact Genernator!

Re: gen to alt
 

Ed Whitney did my alternator for me . He uses the front and rear of your generator so it looks very close to original -Most people would not spot that it is not a generator. Mine is 6 volt positive ground and pumps out about 7.2 volts . Took some time to get it and wasn't cheap but if original looking is important for you (as it was for me ) then well worth it -Karl

Re: gen to alt
 

GM,


I, and probably a thousand other guys, would be interested learning about how you built your alternator. I've considered looking for a 6 volt, positive ground tractor alternator that could be fitted inside an original generator case. I read how to do that somewhere, but can't remember where I read it.

Re: gen to alt
 

Yes I would look around and see what small alternators are available today.
You will need the later larger diameter case. You need to machine an adaptor
to adapt shaft to the Ford pulley. You can change the polarity and use an
adjustable regulator. The square metal box inside the rear cover plate picture
is the voltage regulator I used. G.M.