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voltage regulator temporairly pegging out to16 volts!
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bad58mike
Posted 2015-02-02 3:47 PM (#469252)
Subject: voltage regulator temporairly pegging out to16 volts!



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Location: Southern California		So yesterday while driving my car, I noticed my voltage regulator temporairly pegging out to 16 volts and holding there for awhile. If I came to a complete stop it would drop back to 12.5-13.5, however once I accelerated on the gas pedal it would climb back to 16, then sometimes would drop back to normal after driving a bit. whats going on here? am I potentially hurting anything else on the car?

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Shep
Posted 2015-02-02 4:18 PM (#469254 - in reply to #469252)
Subject: Re: voltage regulator temporairly pegging out to16 volts!



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Location: Chestertown, NY ( near Lake George)		Yes,kill the battery and overload the generator to start with.
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BigBlockMopar
Posted 2015-02-02 5:42 PM (#469259 - in reply to #469252)
Subject: Re: voltage regulator temporairly pegging out to16 volts!



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Location: Netherlands		Run some fine emery paper between the contacts of the regulator to remove any build-up.
The regulator is probably sticking sometimes causing the Gen to provide a constant power instead of a pulsed power.
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hoodinki
Posted 2015-02-03 1:46 AM (#469276 - in reply to #469252)
Subject: Re: voltage regulator temporairly pegging out to16 volts!


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Replace the voltage regulator, they're cheap.
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bad58mike
Posted 2015-02-03 8:54 AM (#469289 - in reply to #469252)
Subject: RE: voltage regulator temporairly pegging out to16 volts!



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Location: Southern California		I see, or what if I ditch the mechanical points type regulator and go with a solid state electrical volt reg like this, anyone use these? These might control the fluttering better.



(image.jpg)



Attachments
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Attachments image.jpg (106KB - 119 downloads)
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bad58mike
Posted 2015-02-03 8:57 AM (#469290 - in reply to #469252)
Subject: RE: voltage regulator temporairly pegging out to16 volts!



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Location: Southern California		Sorry meant go with a electronic volt reg
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58coupe
Posted 2015-02-03 9:17 AM (#469292 - in reply to #469252)
Subject: Re: voltage regulator temporairly pegging out to16 volts!



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Location: Alaska		You didn't say if you are still running the original type generator or an alternator. You probably know you need the older style regulator with the cutout for a gen.
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bad58mike
Posted 2015-02-03 11:47 AM (#469302 - in reply to #469252)
Subject: RE: voltage regulator temporairly pegging out to16 volts!



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Location: Southern California		sorry forgot to mention I have a newer drivetrain all late sixties

440 engine with 727 tranny and this voltage reg pictured above. My car has a squareback chrsyler alternator
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BigBlockMopar
Posted 2015-02-03 4:13 PM (#469313 - in reply to #469252)
Subject: Re: voltage regulator temporairly pegging out to16 volts!



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Location: Netherlands		If you have a square back alt you should have the newer style (flat-ish) regulator with plug on the front.



(Provided you will use both field-connections on the alternator. I presume you have one field connector grounded now)


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rushpowersystems
Posted 2015-02-04 1:30 AM (#469332 - in reply to #469252)
Subject: Re: voltage regulator temporairly pegging out to16 volts!


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Location: West Jordan		Sounds like a flying short in the rotor of the alternator, swap regulators to see if it still does it, and check the grounds. If everything checks out take the alternator to a reputable rebuilder and have them test it. The reason why it stops doing it after driving is the alternator is heating up and the air gap between the rotor and the stator is expanding so your output is affected. BTW, your voltage should not drop below 13 volts. If the alternator is not very old I would question the quality of the parts in the alternator.
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1959Dodge
Posted 2015-02-04 8:01 PM (#469382 - in reply to #469252)
Subject: Re: voltage regulator temporairly pegging out to16 volts!



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Location: Yorba Linda, Ca		Mike's car, as I recall, has 2 large cooling fans, that run , most of the time, so it is not unusual at all for the voltage to drop below 13 volts, at idle.
I installed an electronic volt regulator on my 64 Dodge, probably 20 years ago, and it still works great.

I also have an electronic voltage regulator on my 59 dodge (it has an alternator too), and no problems with it.

Gary.
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rushpowersystems
Posted 2015-02-04 9:40 PM (#469389 - in reply to #469252)
Subject: Re: voltage regulator temporairly pegging out to16 volts!


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Location: West Jordan		An alternator should never drop below 13 volts. If it does then the alternator does not have the amps to power the load, the cable to the batter is too small, the crank pulley is too small, the alternator has too large a gap between the rotor and the stator, or a combination of the 4. In very rare cases the regulator could be failing and causing the voltage drop but if it comes up when you rev the engine they it is most often a gearing problem, that is, crank pulley too small or alternator pulley too large. Having said that if the wires to the fan are too small then that could cause a high amp load, but it would be slow to come up when the engine is revved. Keep in mind, stock Mopar round or square backs rarely get above 25 amps at an idle.
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