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Username Post: Voltage Regulator Problem        (Topic#354956)
Posts: 5

Reg: 03-16-16
01-24-19 01:04 PM - Post#2758126    

Today I replaced the aftermarket Chinese solid state voltage regulator on my 1966 Corvair, with a new OEM Delco Remy unit.  The new regulator is allowing the alternator to overcharge.  I am reading 17.2 volts when the engine is running.  Also, the alternator light stays on all the time.  The light gets brighter as the engine RPMs increase.

The regulator is isolated from the body with rubber grommets, as it should be.  I experimented with grounding the regulator case and, it caused the alternator to growl.

Any advice on my regulator issue is much appreciated.


Frequent Contributor
Posts: 1493
Loc: Tucson, Arizona
Reg: 07-19-00
02-05-19 09:57 AM - Post#2759105    
    In response to RKF

To be honest, I would get rid of the stock alternator and replace it with an internal regulated GM 10SI. I had the same problem years ago with overcharging and I could never get anything to work dependably so I switched and have never looked back!

The 10SI was used on tons of cars/trucks in the '70s and '80s. They are cheap, easy to find and very dependable.

For the Corvair is not a "bolt-on" situation but it's very easy to make the conversion. You'll need to remove the front casting from the 10SI and replace it with the Corvair casting - it fits perfectly. The fan and pulley from the Corvair will also have to be used (the Corvair runs the alternator in the opposite direction from a regular Chevy so the fan from the Corvair is "backwards". You'll also need to replace the electrical plug since the old alternator has a different configuration - the auto parts store has these on the shelf. Redo a couple of wires and you're done. Do yourself a favor and fix it once and for all!

You can go to for a little better explanation and Google for other sites if needed. (sorry there's no direct link - chevytalk url icon doesn't seem to be working today)

'60-'66 Idea Page or Corvair Stuff

Edited by persh on 02-05-19 10:00 AM. Reason for edit: No reason given.

Frequent Contributor
Posts: 1493
Loc: Tucson, Arizona
Reg: 07-19-00
02-05-19 10:04 AM - Post#2759107    
    In response to persh


'60-'66 Idea Page or Corvair Stuff


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