Posted by Bob on August 17, 2018 at 09:49:31 from (64.255.159.199):
In Reply to: generator question posted by notjustair on August 17, 2018 at 09:13:46:
In the old days, generators and regulators were VERY closely matched by part number.
Nowadays, a few generic regulators are sold to replace hundreds of part numbers, and we all know how successful that's been.
Generators vary in field current retirements, and the values of resistor(s) in voltage regulators change with different applications to match this. This has an effect on point life in the voltage regulator section.
Also, there's the current regulation function, regulators are factory set/matched to generators so they limit current to what the generator is capable of without overheating and "burning out".
Your 8N generator is an "A" circuit Ford/Autolite, and your GM truck would have a Delco "A" circuit generator, so in that respect they'd match.
However, I would SUSPECT the current regulator in the truck alternator is set to a higher level than what the 8N generator can sustain.
Bottom line is, what you are proposing MAY work, at least for a while, with the short "runs" your old truck makes, but it's certainly risky as to damaging the VR and/or the generator.
Unless originality is important to you, WHY not just install a 6 Volt internally-regulated alternator, or convert it to 12 Volts and end dealing with a cranky generator and mechanical VR?
I have a '53 GMC truck with a "270" engine and a 1957 Chevy "261" with alternators mounted, I could snap a couple of photos of the mounts, if you'd like.
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