Does anyone know of an adjustable voltage regulator that will work with a Mopar dual field wire alternator? Prefer one with the Mopar plug, but don't mind rewireing if necessary.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

I have seen dual-field regulators with a small trimpot on the back, protruding through the potting compound.

Unfortunately, I can't remember who made 'em, but I'll put in a couple of phone calls.

Update: Found it. Transpo #C8313, should be obtainable via any good local auto electrical house or you can order it online at Weitzel's or here.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

My man, Dan comes through, again. I have one coming from Weitzels. Nice to talk to. Has to order it, but he does take paypal. $24.80 shipped.
Reason for needing is overcharging at 15.xx volts. Cannot find any problems with wiring, and have tried several different brand regulars. I am using the high amp Nippendenso alternator.
Thanks Dan.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Are you certain the alternator is good? Not an internally shorted field?

I used a nippondenso alternator (off an intrepid or something similar?) previously with a stock napa replacement regulator and it was mid 14s cold, 13ish warm, following the temperature compensation of the regulator. Never reached 15.

alternator seems good, if I unplug the regulator it stops charging. As an expeiriment (while waiting for the new reg) I am going to install a variable resistor in the field circuit between the alt and the reg, to limit the field current, and see what that does.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Don't the Optima spiral core batteries perfer a slitely higher voltage? Maybe install one of those. However I am also using the Nipenz alt. and I am charging around 14.5 ish or a pinch higher. Pretty sure I havn't seen 15 volts though. I am using a voltage regulator speced for a '74. (VR-???)

Pics of Regulator (sort of)
http://tinyurl.com/2dutwt
http://tinyurl.com/5euoa8

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

Nope...and even if they did, high line voltage makes other problems (rapid bulb burnouts all over the car, for example).

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I have gone through several regulators using the stock alt. My car goes through them things like you wouldn't believe! Thank goodness for lifetime warranties...

The last one I had was giving full power to the battery!

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'74 Duster 225 Super Six w/904
14" Cragar SS wheels

Usually it's inferior, off-brand parts that are sold with a "lifetime warranty" by junk shops like Autozone, Checker, Schuck's, Kragen, etc. It means you get to spend your lifetime replacing shoddy parts under warranty. Better to buy a quality regulator (Standard-BlueStreak, Echlin, or Transpo) and only have to buy it once.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thats exactly what it is (except its O'Reillys) and thats exactly what I need to do, when my current VR goes out in a few weeks...

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'74 Duster 225 Super Six w/904
14" Cragar SS wheels

so is the transpo parts decent? - dan i would imagine you wouldnt mention this brand unless they were of some reputable quality? - i see on their site they make a lot of different electrical system components - the price certainly seems good - oo3

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69 a100 225 tree3

http://slantsix.org/forum/viewtopic.php ... ht=transpo - never mind - cant forget about that search function - oo3

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69 a100 225 tree3

Bringing back an old topic. I also had the same problem Charrlie had...over charging with a known good alternator, good wiring, new Interstate battery. I was running at 15.6 volts at idle. The other day when my ignition control box went out, it was putting out 16.2! Later the next day, I tested it again with the same results. So I tried another alternator with the same results. I installed a Transpro adjustable regulator I had ordered early last week (I've known I had a problem for a month or so) and got voltage down to a 14.6 volts, no matter what rpm or load is put on the system. I also replaced the crimped ends and ring connecters of the 10g wires that attach to the alternator stud, as they where exposed on one. One thing I don't like though, is the Transpro box had a made in China sticker on it, so I guess another one bites the dust. Anyway, just wanted to share my experience with this unit.

I got my Transpo adjustable VR last week, and tried it. Even at the lowest setting, was charging too high (approx 15 V). I didn't do any more with it. I don't have time to work on it right now. I have a 64 Valiant that I have to finish, before the customer, comes after me with a shotgun . After I get done with that, I plan on spending a few days on my cars.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

14.6 is still too high, and 15 is way too high. I'm goin' back to my original diagnosis: there is something the matter with the regulator's wiring. High resistance upstream of the regulator and/or floating grounds, probably.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.