I.D. of an Ignition Module

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Professor Fate

Professor Fate

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While trying, somewhat futilely, to get a bit more organized in my shop, I came across this ignition module in a tub of ignition parts. Due to OFS (Old Fart Syndrome), I have no idea where I got it or where it came from.
upload_2022-1-18_15-32-47.jpeg

It's a five pin, and I have no idea what the adjuster is for- a rev limiter, perhaps?
It is only about 2/3 the size of a standard module, and no transistor/heat sink on it... no markings or numbers on it whatsoever.
upload_2022-1-18_15-38-43.jpeg

Anybody have any ideas? Thanks!
 
No idea never saw one before. Rev limiter? It has the plug for a ecu but the body of a VR? Those I have seen adjustable. Any numbers on it at all? The other is definately a ECU low rev OEM
 
halifaxhops said:
No idea never saw one before. Rev limiter? It has the plug for a ecu but the body of a VR? Those I have seen adjustable. Any numbers on it at all? The other is definately a ECU low rev OEM
Click to expand...
Yeah, the stock one I just put in the picture for a size comparison.
If it is some brand of performance module, I find it odd that it's a 5 pin instead of the more universal 4 pin types. May help date it to the years before they went 4 pin.
No numbers or any type of identification on it at all. It was covered in a thick coat of black paint that was flaking off (no paint marks), cleaned it up a bit looking for stampings, no luck. Dug through some old speed catalogs and DC catalogs looking for something similar, but no luck there either. Not Industrial or Chrysler Marine, either; as near as I can tell.
Yes, seems odd that it uses a VR type case. I'm half-tempted to just hook it up and see what it does, but not until I've got some idea what I'm dealing with.
 
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It is possible it might not even be an ignition module, 'per se'

My guess? Aftermarket rev limiter or aftermarket, adjustable VR.
 
I used to have many of those, but, never got a call for one. All mine came off police cars.
 
Yes, it was an actual Mopar part. Not sure what the adjustment did. I presumed like you that it might be a rev limiter. I know that those cars had an A/C cutout feature for high RPM use. Not sure if this had anything to do with it or not.
 
So, being a factory 5 pin, it must be from '71-'72ish- now to hunt down a parts book (of course I don't have those years...) and maybe a service manual to try to figure out what the adjustment does. Off to Mymopar.com and see what I can find.
 
Mine were off mid-70's 440 C-body cars and they all were orange IIRC.
 
Professor Fate said:
So, being a factory 5 pin, it must be from '71-'72ish- now to hunt down a parts book (of course I don't have those years...) and maybe a service manual to try to figure out what the adjustment does. Off to Mymopar.com and see what I can find
Click to expand...
Wouldn't 5 pin go all the way back to 68 / 69.

I recall seeing in a parts book some "packages" like police, taxi etc. Toward the front of the cataloge
 
I don't think these existed in 68-9, but again, they may not be ignition modules either.............
 
I believe the ECU ign became standard in 1971-2, not before that.
 
The police package did have something that went off when the AC was on. some sort of ac cut off I think if it was in a chase I believe. Not sure if it is that or not.
 
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