Instrument Voltage Regulator (WAS Re: Voltage Limiter)
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Instrument Voltage Regulator (WAS Re: Voltage Limiter)

I'm an old school electronics tech (U.S.Navy 1966-69, and have been interested in the potential for failure of the IVRs that Ma Mopar so cleverly built into the fuel gauges of my beloved early A body Darts for a long while.  While following the previous thread, I reviewed the info on the Real Time Engineering website, which has been up for some years, with few changes.  This time, I noticed an ordering option with an instant payment feature. 

Well, even though my 50 year old IVRs gave not failed, I decided to splurge and placed an order with RTE on June 1st.  I received my limiters today, June 3rd, along with a helpful data sheet and some testing resistors.  This was a pleasant surprise, and the testing procedure is not on the website.  I will be using it to test the other '63 & '64 MOPAR gauges I've collected so I'll know if they are "real" spares or maybe parts or scrap.

Disclaimer: I have no affiliation or other interest in RTE, I'm just a pleased and satisfied customer.


On 5/31/2015 11:59 PM, Bob wrote:
P.S.  I seem to have misplaced another list of MOPARS with IVRs built into the fuel gauges.  I know for sure that '63 & '64 Darts and '74 motor homes had them, as I own or did own them.  If you don't find a plug-in IVR on the back of your cluster, it's in the fuel gauge.



On 5/31/2015 11:44 PM, Bob wrote:
I noticed that IVR had the Real Time Engineering website on the circuit board.  A few mouse clicks and I found THIS:
Which is the info I referred to about the IVRs built into the fuel gauges.

The RTE site is still up, and has sales info, pricing and lots of info and pictures.  Obviously put together by some real electronics folks who are (were??) also real MOPAR fans!

More links from their site:

Information about which limiter style is usedin which car here:

More helpful info here:

I dunno if there is still anyone at RTE, so I'm archiving all the info I can.


On 5/31/2015 7:04 PM, Herb wrote:
I concur 100%, solid state in all of mine!  Here is the only voltage limiter I could find on eBay currently.    I use solid state two wire voltage regulators also!
-------Original Message-------
Date: 5/31/2015 3:56:31 PM
Subject: Re: Voltage Limiter
put a solid state in my 64 polara with no problems, got it on e bay for $20 ??

On Sun, May 31, 2015 at 3:20 PM, Gary H. <62to65mopar@xxxxxxxxxxx> wrote:
Try RTE in Springdale, AR, if they are still in business. (Anyone know?)
Their website has not been updated in a very long time.

Gary H.

>  On 5/31/2015 1:43 PM, Robert Faunce wrote:
>  > Hi - I am trying to track down an instrument panel voltage limiter
>  > for a 65 Barracuda. The only one I have found so far is a Standard
>  > Motor Products VRC-601. About half the sites I have looked at
>  > recommend this part # while others, including the Standard Motor
>  > Products site, say it is not the correct part. It looks identical
>  > and Mopar apparently used the same part for years. Anyone know for
>  > sure? Bob from Maine --

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