Battery Charging Problem - No alternator output - Bad VR?

[katigbr]

Tried searching the archives but couldn't find any supporting posts.

I purchased a 66 911 last year to "feed" my habit while my 72 "Gretchen" was being rebuilt.

I installed a 2.7RS-clone motor in it over the winter and was running fine until a month or so ago. She started draining the battery, sputter and missing. I then noticed that the alternator light started to glow and got brighter as I drove. I tested the voltage at the battery during idle and at 3000rpm. It never rose above 12.x volts. I assumed it was the alternator.

I've :

1) charged the battery
2) replaced the ground cables at battery and transmission/tub
3) replaced the alternator

The problem still exists.

Can a bad voltage regulator cause a no charging situation?

Any other ideas/suggestions?

gratuitous picture:



Regards,
Rick

[ruf-porsche]

Can a bad voltage regulator cause a no charging situation? YEP

Any other ideas/suggestions?
Replace the voltage regulator with a new one, or one that you know is working.

gratuitous picture: WOW NICE CAR.

[Jim Sims]

Check the wiring (driver's side of engine compartment) between the alternator and voltage regulator if you have an external voltage regulator. Jim

[katigbr]

Thanks guys. The VR is on its way from PP. I love the 66. I love it even more with the 2.7 in it.

Rick