Please help ID this alternator

[kaj750]

I keep reading round back, square back, single pole, etc...
I just need to know: if I want to find an alternator that puts out a bit more amperage......WHICH type am I looking for?
Or this aftermarket and already generating more than OEM?

I'm guessing a Dodge/Chrysler fit with a spot on the back for one wire and a pulley for two belts.
But it sounds like it's more complicated than that, for some reason. Lol

This is currently (no pun intended) in my 1969 Charger with no A/C (installing aftermarket soon).

 

[Dave6T4]

Round back, single field, with a catch-all dual pulley. Can be used on most '60's Mopars. This is what you will get from rebuilders through auto parts stores. It is almost impossible to get a single pulley on them anymore. Likely about 60 amps.

 

[Nacho-RT74]

Incorrect grounded brush on it.

It should be this

And looks like this mounted

 

[kaj750]

Incorrect grounded brush on it.

It should be this

View attachment 2007910


And looks like this mounted


View attachment 2007911

I'm not sure what that means, but I'll make a note of it. Thanks!

 

[Nacho-RT74]

Just that the one you have is a correct alternator for the year, but got the wrong brush installed… and I’m showing the correct brush and how it looks installed.


The one installed there is from a double field alt. Does it work? Yes, but…


Aside of course the double pulley… being no A/C should be single pulley, and all those years got a larger diameter pulleys. They become smaller on lates 70 earliers 80s (the one your unit actually gets) to get more juice from them at idle speed (aside some other mods)

 

[kaj750]

Gotcha. It seems to work. Maybe a good idea that I'm looking to change it, then. I can't seem to find a verified match online. My local auto parts store seems even worse. Lol
I'll have to do a few purchases and returns to get right, I suppose.

 

[Nacho-RT74]

The best match and HiPo alt available come from TuffStuff or Powermaster

 

[gary h]

It appears most parts stores only have the "Squareback" version for the 1960's Mopars these days.

 

[kaj750]

It appears most parts stores only have the "Squareback" version for the 1960's Mopars these days.

Which would affect me how? Will it not use the same mounts, wiring harness, etc?

 

[Nacho-RT74]

Factory used these 4 setups (despiting pulleys and outputs)

Up to 69… roundback single field
70-71… roundback dual field
73~80s… squareback dual field
80s~<… squareback dual field revised version


The last one is really similar and looks the same than earliers by an untrained eye but is a bit wider and bulky. They can get some fitment and alignment issues depending on engine and accesories

The other ones interchange perfectly.

You can get a dual field (round or squareback ) and ground one of the brushes to convert it into a single field

PowerMaster offers roundback 95 amps alt (60 at iddle) though. And the squareback they show on catalog is the revised version (or used to offer).

Can’t recall if TuffStuff offers High output roundbacks. I know they offer stock at least (or used to offer).

 

[Nacho-RT74]

Some more info… and attached the Mopar stock look options from PowerMaster

Gallery: How Powermaster Performance Improved Chrysler's Alternator - Mopar Connection Magazine | A comprehensive daily resource for Mopar enthusiast news, features and the latest Mopar tech

The roundback PowerMaster shows on their catalog seems to accept dual and single field setups just using the correct brush. Some roundback replacement alts used to be casted with provisions for both setups.

 

[TN Mopar]

I run a chromed squareback I won as a door prize in my 66

it gives me a little more output
I just grounded the second field terminal

 

[kaj750]

Awesome, thanks! Is there a preferred spot to ground the second field, or just wherever is closest?

 

[Nacho-RT74]

Awesome, thanks! Is there a preferred spot to ground the second field, or just wherever is closest?

If you get a dual field unit, you can wire one of the fields wherever around.

But you can also replace the isolation washer down the screw with a metallic one. That will also ground the brush and is cleaner. If you proceed with that is adviced to clip off the brush prong to save from wire it by mistake with the signal coming from the mech regulator, which is positive and if you wire it there will short out as soon put the key in RUN.

If you get a roundback dual field with the provision for the grounded brush, you could also get the correct brush for single field install it and remove the one on the opposite side.

 

[kaj750]

If you get a dual field unit, you can wire one of the fields wherever around.

But you can also replace the isolation washer down the screw with a metallic one. That will also ground the brush and is cleaner. If you proceed with that is adviced to clip off the brush prong to save from wire it by mistake with the signal coming from the mech regulator, which is positive and if you wire it there will short out as soon put the key in RUN.

If you get a roundback dual field with the provision for the grounded brush, you could also get the correct brush for single field install it and remove the one on the opposite side.

That all sounds confusing to me. I'm not even sure what half of it means lol.
I'll just keep it simple.
Thank you, though.