What Distributor is This?


1984ranger28

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Hi, I'm converting my 2.8l ignition system to the earlier duraspark ignition. I purchased a re manufactured A1-Cardone single vacuum and was mailed a different distributor instead. They refunded me and let me keep this distributor because the distributor I need is out of stock, and was also on sale for $35. So what distributor did they send me? Here are picturesrsz_20190207_184637.jpg

rsz_20190207_184647.jpg

rsz_20190207_184746.jpg
 


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pjtoledo

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the nylon gear indicates it probably does not drive an oil pump. that's my best guess, worst guess is a hellifiknow V6
 

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That's from a 1976 mercury montego I6 250.
 

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No vacuum advance so it should be later than 1976, lol

So Fuel injection days at least, early to mid-1980's 6 cylinder
Also dual sensors, so sequential EFI
 
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85_Ranger4x4

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Doesn't really look like Ford connectors, kinda like four pin trailer connectors or something.

I don't see the lip for a hold down like most Ford distributors I have been around.
 

Dirtman

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No vacuum advance so it should be later than 1976, lol

So Fuel injection days at least, early to mid-1980's 6 cylinder
Also dual sensors, so sequential EFI
I just named the first car that popped into my head... :icon_rofl:
 

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No vacuum advance so it should be later than 1976, lol

So Fuel injection days at least, early to mid-1980's 6 cylinder
Also dual sensors, so sequential EFI
It could be a swing-weight advance. Those were used before vacuum.

Doesn't really look like Ford connectors, kinda like four pin trailer connectors or something.

I don't see the lip for a hold down like most Ford distributors I have been around.
That's the style of plug Ford was using in the mid-60s. My mom's Mustang is full of them.

It looks like one from a 60s industrial I6, but has a few differences.

I am also wondering if it's one for modifying away from points to a magnetic pickup. That could also explain the dual pickup. If it replaces what would have been a dual points system, that would need two pickups, but I don't think it can be used for sequential EFI, since all the teeth are the same, so there is no way to differentiate a signal for cylinder 1.
 

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It kinda looks like an old Chrysler slant six dist without a vacuum advance... industrial application perhaps.
 

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Weights were for RPM advance, vacuum advance distributors had that

Electronic spark module already has RPM from its distributor sensor, so didn't need the weights for RPM advance, it just followed simple RPM spark advance

Vacuum advance is for rich/lean ratios which needs some kind of throttle vs RPM detection, which was intake vacuum or later throttle position sensor and computer sent "vacuum advance" to spark module, i.e SPOUT on TFI, basically a Load detection for faster spark timing response.
 

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And Chrysler did love their dual points system.
 

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Weights were for RPM advance, vacuum advance distributors had that

Electronic spark module already has RPM from its distributor sensor, so didn't need the weights for RPM advance, it just followed simple RPM spark advance

Vacuum advance is for rich/lean ratios which needs some kind of throttle vs RPM detection, which was intake vacuum or later throttle position sensor and computer sent "vacuum advance" to spark module, i.e SPOUT on TFI, basically a Load detection for faster spark timing response.
"Vacuum" advance was often quite different functions that looked the same. Some systems sourced the vacuum from port in the venturi above the throttle plate, so vacuum increased as airflow through the carb increased. Some sourced it from manifold vacuum. The two signals are almost (but not quite) opposite.

I still like carbs, but the vacuum control systems you can have. I still have some documents that are basically datasheets for all those old vacuum devices, and I could make them work, but a microcontroller is so much better for that kind of thing.
 


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