Anyone make a good Voltage Regulator?
#2992190
12/05/21 10:52 AM
12/05/21 10:52 AM
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Joined: Jan 2004
Posts: 367 Newark DE
Dogpro
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enthusiast
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OP
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Posts: 367
Newark DE
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Does anyone make a good under hood voltage regulator for a 70 cuda? The one I have had since the mid 90"s went bad and I replace it with a parts store one and it smoked within a month, so now I'm looking for something reliable. Any suggestions?
Lou P. Newark DE
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Re: Anyone make a good Voltage Regulator?
[Re: 70Duster]
#2992199
12/05/21 11:16 AM
12/05/21 11:16 AM
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Joined: May 2019
Posts: 6,175 nowhere
Sniper
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Standard Motor Products VR125. Rock Auto has them for $26.79 plus shipping. Do not get the VR125T which is the economy version. Have this in my 70 Duster and 87 Dakota. No issues. That's the one I used when I converted my 51 Plymouth to 12v, year and a half later still working fine.
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Re: Anyone make a good Voltage Regulator?
[Re: gtx6970]
#2992321
12/05/21 04:57 PM
12/05/21 04:57 PM
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Joined: Jan 2004
Posts: 367 Newark DE
Dogpro
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OP
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That thing looks like a lightning bolt came out of the back :. After checking it out wiring and alternator are good. When I looked up the VR125 it said that it was encapsulated in epoxy so I cut open the parts store one I found it was filled with sand as an insulator . That's what I get for buying a cheap part
Last edited by Dogpro; 12/05/21 04:59 PM.
Lou P. Newark DE
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Re: Anyone make a good Voltage Regulator?
[Re: 71birdJ68]
#2992449
12/06/21 03:27 AM
12/06/21 03:27 AM
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Joined: Jan 2003
Posts: 28,576 Shopping @ HoBo Fright
340SIX
Doc Flappergas's Evil Twin
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Doc Flappergas's Evil Twin
Joined: Jan 2003
Posts: 28,576
Shopping @ HoBo Fright
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AC Delco makes a replacement Mopar one says made in USA is $24.41 shipped. On Amazon says it would be to me Wensday. ACDelco Professional C603Z Voltage Regulator Looks like many stock it. Amazon says it is plain black Here it is on Summit. But review says it is chrome if it works spray bomb it https://www.summitracing.com/parts/ado-c603zTuff stuff also USA Made 7545 - Tuff Stuff Performance Replacement Alternator Regulators
Last edited by 340SIX; 12/06/21 03:57 AM.
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Re: Anyone make a good Voltage Regulator?
[Re: 71birdJ68]
#2992466
12/06/21 08:54 AM
12/06/21 08:54 AM
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Joined: May 2019
Posts: 6,175 nowhere
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I've got three NOS regulators and they all charge to high. I think age has gotten to them, they might be ok for a lead acid battery, but not one of the repo gel types. I got a Mopar performance one and it does as it should. No one makes a regulator designed for gel type batteries. They make them for lead acid ones and that's the only thing they were designed to charge. So your regulators do not charge too high, you put the wrong battery in for the charging system's design.
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Re: Anyone make a good Voltage Regulator?
[Re: 71birdJ68]
#2992552
12/06/21 01:02 PM
12/06/21 01:02 PM
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Joined: Sep 2003
Posts: 19,239 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,239
north of coder
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as i understand, 13.8-14.2 is acceptable rate of charge for a 12v dc battery. now with that said, would it be possible for the voltage gauge mounted inside the car, to pick up a 14.7v signal from the alternator, but if measured voltage at the battery, to be only 14.2 volts due to voltage drop throughout the system ? also, how accurate are most aftermarket voltage gauges compared to a fluke meter, which many do not own ? [i own several, but i have never taken the time to compare readings against a parts store gauge]
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Re: Anyone make a good Voltage Regulator?
[Re: moparx]
#2992592
12/06/21 03:12 PM
12/06/21 03:12 PM
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Joined: Jan 2003
Posts: 1,908 Nebraska
4406bbl
top fuel
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top fuel
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Nebraska
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as i understand, 13.8-14.2 is acceptable rate of charge for a 12v dc battery. now with that said, would it be possible for the voltage gauge mounted inside the car, to pick up a 14.7v signal from the alternator, but if measured voltage at the battery, to be only 14.2 volts due to voltage drop throughout the system ? also, how accurate are most aftermarket voltage gauges compared to a fluke meter, which many do not own ? [i own several, but i have never taken the time to compare readings against a parts store gauge] Well things get a little funny sometimes....a fully charged lead battery will measure 12.6 volts, but will never get there without 13.2 volt charge rate, or 14.25 dead cold. I have seen computer controlled regulators with battery temp sensors hit 14.7 at -10 temperature. Sometimes you readings are skewed even with a fluke meter, the reason is that as a battery charges it gases off and that gas inside becomes a sort of phantom cell, showing up as a little higher voltage. Load the battery a little to burst those bubbles to get a true reading with any battery. Headlights on and off works pretty good. I have an optima that sees 14.7 all the time cold and it is 5 years old, no issue, agm batterys seem to be fine with that high voltage also.
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Re: Anyone make a good Voltage Regulator?
[Re: 4406bbl]
#2992689
12/06/21 09:12 PM
12/06/21 09:12 PM
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Joined: May 2019
Posts: 6,175 nowhere
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master
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Re: Anyone make a good Voltage Regulator?
[Re: Dogpro]
#2992696
12/06/21 09:28 PM
12/06/21 09:28 PM
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Joined: Apr 2005
Posts: 338 SoCal
RustyDuster
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That thing looks like a lightning bolt came out of the back :. It was common for the potting material to look like this and even drip on the inner fender without any functional problems at all. Inadequate heat dispersion probably fried many of these..
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Re: Anyone make a good Voltage Regulator?
[Re: moparx]
#2992704
12/06/21 09:42 PM
12/06/21 09:42 PM
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Joined: Jan 2003
Posts: 15,197 Omaha Ne
TJP
I Live Here
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I Live Here
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Omaha Ne
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as i understand, 13.8-14.2 is acceptable rate of charge for a 12v dc battery. now with that said, would it be possible for the voltage gauge mounted inside the car, to pick up a 14.7v signal from the alternator, but if measured voltage at the battery, to be only 14.2 volts due to voltage drop throughout the system ? also, how accurate are most aftermarket voltage gauges compared to a fluke meter, which many do not own ? [i own several, but i have never taken the time to compare readings against a parts store gauge] With lead acid batteries I have always aimed for 13.8 to 14.2 at the battery. Using a Fluke 87 True RMS meter. I prefer to see 14.0 to 14.5 but anything higher is concerning. Comparing the Alternator Batt stud to the Battery reading will indicate a problem if there is a substantial difference. There normally is a bit due to the age of the harness, connections, wire sizes, Voltage regulator etc. Anything over .5 IMO requires investigation. Gauge's IMO are good indicators but can be off for many reasons
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Re: Anyone make a good Voltage Regulator?
[Re: TJP]
#2992730
12/06/21 10:38 PM
12/06/21 10:38 PM
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Joined: Nov 2007
Posts: 21,808 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,808
Kirkland, Washington
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as i understand, 13.8-14.2 is acceptable rate of charge for a 12v dc battery. now with that said, would it be possible for the voltage gauge mounted inside the car, to pick up a 14.7v signal from the alternator, but if measured voltage at the battery, to be only 14.2 volts due to voltage drop throughout the system ? also, how accurate are most aftermarket voltage gauges compared to a fluke meter, which many do not own ? [i own several, but i have never taken the time to compare readings against a parts store gauge] With lead acid batteries I have always aimed for 13.8 to 14.2 at the battery. Using a Fluke 87 True RMS meter. RMS is an AC concern, not DC, but I suppose it might have an application when looking at the waveform from the alternator.
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