I found some so called and labeled 8 volt volatge regulators, but they were for Model T's I believe. As far as tractors in the 40's and 50's I have only seen 6 or 12 but hey I never really searched for an 8 volt.
HERES THE DEAL A genny dont necessarily know what its voltage is supposed to be, it increased EITHER by turning it faster ORRRRRRR pumping more current through its field windings which increases the magnetic field strength.
I have sucessfully used a 6 volt genny to charge a 12 volt battery simply by changing to a 12 volt VR. NOW Before anyone has a calf (some here tend that way lol) Im NOT saying its engineering correct or perfect or that it charged at a real high rate, Im ONLY saying it worked and never caused a problem.............
NEXT field current control relays inside a VR operate and are regulated by things such as spring tension and/or air gap distance sooooooooooo those can be adjusted to achieve more output. An old fashion genny repair shop has the tools and knowledge and can "tweak" up a VR if needed.
Im NOT a fan of the freak oddball 8 volt system (considered by "some" (NOT all) as sort of a "band aid" fix) although some used it to improve cold weather cranking (which it can) and thats fine with me its their money and their choice... If I was going to convert Id go ahead and use the standard and parts available regular 12 volt system then the oddball 8 volt system.
Yours is a GREAT question, no problem how does one learn if they dont ask, hope my post helps you.
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