Voltage regulator

[BLK76911]

Decided to replace the voltage regulator as part of my alternator light staying on, constantly, while the car is running, after installing a new battery. It is a '76 911 so it should be a stand alone regulator rater than one in the alternator unless at some point someone replaced the alternator w/a newer one, I will be taking it out and taking it to be rebuilt. My question is were would the voltage regulator be, I am new to Porsche and can not find a pic of it. Their is a box mounted next to the accumulator and Fuel filter, which I have new and will replace, the box is ribbed , about 3"x4", has a lot of wires comming out the bottom and says Perma-Tune on it w/a serial number, stock or add on?
Thanks for any help.

[darrin]

perma-tune = ignition, not charging https://permatune.com

[BLK76911]

Originally Posted by darrin

perma-tune = ignition, not charging https://permatune.com

Thank you darrin.

[LIRS6]

Can’t speak for ‘76, but VR on my ‘79 is behind this cover



Jason

[Jack Stands]

The voltage regulator will be a small box with a three bladed connector behind that cover.

[BLK76911]

Thanks guys, I do have a cover like that on the drivers side.

[porschyard]

Post a picture of your alt. shaft, if it is solid you will have an external V.R, if it is hollow it will be an internal V.R

Richard

[Trackrash]

It looks like you can see the edge of your regulator in you picture. It is usually mounted to the left of the CDI. This is a solid state replacement in my car, yours may look like a small metal can.

[BLK76911]

Here is what is lurking behind my black cover. I take it that the black thing is my regulator from the looks of the plug, can not see any mounting bolts/screws of any kind but it is definitely secure to the back plate, maybe the black cover comes off somehow to reveal a screw/bolt mounting it to the metal bracket that everything else is mounted to and has bolt securing it to the inside of the fender. Any ideas short of loosening the complete bracket ?

[BLK76911]

Well I did get it off, had to take the ignition module off to get at the screws which is ok because I need to replace the gas filter and accumulator.

I am wondering if now might be the time to replace that ignition modual.

[Trackrash]

For the price, one of those new solid state regulators is good peace of mind.

[BLK76911]

Originally Posted by Trackrash

For the price, one of those new solid state regulators is good peace of mind.

Damn, $500 and some...

[JSV798]

I replaced the regulator on my 1978SC a while back; the clue that it was failing was over charging on the battery and a tachometer that would swing wildly. I didn't know what was wrong until I fitted a voltmeter to the cigarette lighter socket and found I was getting over 18 volts. Fitting a new regulator (about £55) fixed both the overcharging and the swinging tach.

[Walt Fricke]

On my track car I run a 914 external regulator. It is in a small aluminum housing with the three prongs sticking out of the potting material. Not necessarily the right VR for my alternators, perhaps, but works fine for an external VR. Not big $. Certainly solid state.

The early external regulators were all old school, weren't they? had relays inside a fairly large housing? There has to be something shy of $500 as a replacement. What is the stock one?

Every 911 should have a volt meter plugged into the cigarette lighter hole. A VR which has failed so you don't get a charge will just leave you stranded somewhere inconvenient - like at night. One which overcharges can damage the battery, and force sulphuric acid out, along with a lot of hydrogen, which could be set off by a stray spark. You can usually smell when overcharging is happening.

[timmy2]

Originally Posted by BLK76911

Damn, $500 and some...

https://www.pelicanparts.com/More_Info/91160320613M260.htm?pn=911-603-206-13-M260&bt=Y&fs=0&SVSVSI=784

$50 and will plug right in

[BLK76911]

Gentlemen, my comment on the 500.00 was referring to the ignition module, I got my voltage regulator for 31.00. Sorry for the confusion. Lol

[BLK76911]

Concerning my alternator issue, someone suggested replacing the voltage regulator befor I either buy a new alternator or have mine rebuilt, thank you for that suggestion. After I found were the regulator was I decided I may as well replace the gas filter and accumulator while I was in that corner, today I replaced all three, not bad once you sat and looked at things and got contorted a bit, it wasn't that bad. After I got every thing hooked up and got the engine , my alternator light stayed on for a few seconds and the went out and my plug in , cigarette light, diagnostic tool told me I was charging at 13.5 - 134.8 and my light stayed out, I was a happy guy. Still will probably have it rebuilt as I don't know weather it is original and w/a 2,000 mile trip to the Bad Lands and Yellowstone in Sept, I think it is good insurance along w/ replacing a lot of little things.