12 Volt Alternator for a 8N?

[Aeolius]

My 1949 Ford 8N has been converted by the (unknown) previous owner to a 12 volt system. The alternator is inoperative. Anyone know what it should be replaced with and where you can find one? The one in there now is a Delco Remy with a parts number no one seems to be able to track down.

 

[old]

Best one to go with and the cheapest is a Delco 10si. Ask for one that fits say a 1980 Chev pick up with not power any thing. You can buy them for around $35-45 and if you have an O'reillys auto parts store close that is with a life time warranty. If you have a core it will be $35 or so with or a core add $10
Hobby farm

 

[carman870]

Just checked with our parts store. Find someone who has been around a few years and ask for a "one wire" delco 10si alt. They are built with a self exciting regulator and you just run 1 wire from the rear post to your ign. sw. key on power post and you're done. It may take about 1200 rpm after startup to get them charging but once they start they self regulate and charge at idle.

 

[Bob]

NEVER EVER connect the OUTPUT of an alternator to the "key on power post" of your ignition switch.

The alternator can put out 45 to 70 Amps, and it's lucky if your poor little abused ignition switch can handle 8 Amps!

And, preferably, don't buy a one-wire alternator to begin with!

 

[Dell (WA)]

Carman.......we find the simplistic 1-wire alternator conversion takes about 1800rpms to begin to self-excite. I don't like crankin' a COLD engine to almost full throttle to kick the self-excite internal gutts on. The 3-wire idiot lite scheme Delco 10SI external excite starts at 600rpms. Much better on yer 400rpm tractor engine when cold, don't you think???

DO NOT CONNECT yer 1-wire output to the ignition switch ON terminal, use the BATT supply terminal, or the solenoid batt terminal. Yer weaksister ignition switch can't handle the alternator 35-amps output........respectfully, Dell, a 12v advocate for the right reason, who knows 8-ways to convert and now a gazillion+1 ways to do it WRONG.