Do I need Voltage Regulator?? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-06-2009, 09:22 AM
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Do I need Voltage Regulator??

Hi and thanks in advance for any help.
I have a 65 chevelle as with all old chevelles
they have a voltage regulator on the radiator
core support with stock set up. After ripping out
all the old engine stuff and dumping in modern engine
with alternator, "is the voltage regulator even needed any more"?
GM alternators have built in regulators I thought.
I am running mine without the separate voltage regulator. Seems to run
good. At time the charging gauge is up around 14+/- volts.
Any harm in not using the 65 set up?
Thanks
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Old 11-06-2009, 10:47 AM
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You no longer need the external voltage regulator.
I have an old tractor that I converted to 12 volts, using a GM internally regulated alternator. There is literally one wire from the alternator to the battery.
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Old 11-12-2009, 12:50 AM
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Some Info here on 1-wire, 3-wire Alts. etc.. 3 Pgs. >> http://www.madelectrical.com/electri...evymain1.shtml

Last edited by SSedan64; 11-12-2009 at 01:01 AM.
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Old 11-12-2009, 09:24 AM
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65 Malibu Wiring, Thanks SSedan64

Thanks a lot for the info. Right now I have by-passed all the regulator
stuff (everything) and brough power right to the stock fuse box. Everything
works, but while running my alt gauge says over 14 volts. Don't want to fry
anything nad I am not the best when it comes to electrical.
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Old 11-12-2009, 09:04 PM
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how much more than 14?

all the red wires need full time hot at the alt

same with the larger wire on the plug in on the alt

the smaller ones has to be connected to dash guage or light
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Old 11-13-2009, 08:40 AM
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65 Malibu Wiring, Thanks Fast68

I have a remote alt gauge trio with oil and temp. On the alt
gauge I followed gauge directions and hooked a lead to ignition
while key is on and ground the other to the fire wall. With key on,
not running she looks good at 12V then when I start it she goes up to
about 14.2 or 14.3+/-
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Old 11-14-2009, 10:42 AM
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if memory serves me right,,newer chevy's put out 14+ volts to power all the electrical crap.. the only thing you should need to keep a eye on is battery water..may boil out a little quicker.. with all lites on , does volts drop any?? I have same set up on my '63 chevy truck,, drove it for 20 years now ,, no problems...
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Old 11-16-2009, 09:13 AM
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Wiring 65 Malibu...thanks "bobjob"

Hey thanks for the info. i have not checked to see if voltage drops
when I have everything on yet....I will though. Wonder if I should wire
everything up the way it was from the factory and the only differance will
be my 1974, 454 with that alternator setup. Sounds like on 63-68 the horn
relay is what everything goes through via the "SPLICE".
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