Voltage Regulator Replacement

P

pebo va

Member
I need to replace my VR in my stock 6 volt "49 Ford. I never seem to get more than 2-3 years service from the NAPA VR 401 made by Echlin.
I have an American Bosch, 6 volt 40 amp, new in the box, replacement but it is much heavier and a bit larger than the Echlin. If I install the American Bosch and it malfunctions for some reason, can it damage some other part of my electrical system? Is there any other downside other than it just doesn't work?
 
I can't speak to the problems using a 40 amp regulator in a circuit intended for 30 amps, but can attest to the fact that the quality of current replacements has slipped badly over the years. I installed a solid-state replacement in my '67 Corvette about 5 years ago after experiencing the same problems you have. A member on here, "flatheadmurre" has developed a solid state regulator for 6 volt positive ground 30 amp systems that may be just the ticket. I can vouch for him and the quality of anything he offers. The only problem is that he is located in Sweden. You may want to PM him about the possibilities.
 
Using a 40 amp regulator with a 30 amp generator is like haul 3 tons on a truck that was rated for 4 tons.
Take the generator and voltage regulator to a starter & generator rebuilding shop and ask them about it.
Remember to remind them it is positive ground if they offer to test everything for you.
 
Tubman is right, that stuff is getting harder and harder to come by.
On my ‘51 F1 I have a 6 volt Chevy generator with a Chevy 12 voltage regulator mounted upside down so the wires will reach charging 12 volts because I changed the truck to 12 volts since I often rent small utility trailers that are always 12 volt.
It had the Chevy generator and a 6 volt regulator when I bought it.
I plan to put an alternator on it, I’d hate to have something happen to the charge system a few hundred miles from home, or on a Sunday.
 
I have American Bosch generators...they are the size used for Lincolns...
Using a regulator with a 40A current limitation on a 30A rated armature isn´t the best choice...
My solidstate regulators is about 3 month away from the first customer units for sale.
I have units out in field testing right now.
 
Thanks to all for the good advice. I will wait until flatheadmurre has completed his test and give that a try. I am hoping my NAPA VR will last 3 months.
 
Take the regulator to an old time starter/gen shop and have it tested/repaired. JMO
Paul in CT


Recently had the gen in my 40 rebuilt, took the gen and regulator together.
FWIW
 
The centre relay in your 40 amp regulator is the current control which can be adjusted down to 32 amps to match your generators safe maximum output. Best to find an older auto electrical shop with an experienced older man who knows how to do this adjustment. It should work fine with your 32 amp generator. Regards, Kevin.
 
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