Alternator question???????

I'm using a 440 bb from a 68' New Yorker and it has what looks to me to be a single wire alt? I am only running lights, brake lights, gauges and a 1/2 hp air compressor. Does the alternator have a built in volt reg? Or do I need to get a volt reg to run what I have on the truck? Any info would be great. About to start wiring.

Thanks,
Brandon

 

If its a mopar alt it should have an external reg, depending on how new it is more than likely solid state.

Post a pic of the alternater so we can see if its a MOPAR or a GM that someone adapted, or what?

 

This is only pic I have at the moment. If need be I can upload a better pic tonight.

 

Yeah, maybe if you post your own thread. You might get a response.

 

brawal128,

we had a dodge (440 powered) rv and that looks exactly like the mopar alternator that was on that. Does not look like GM product.

Patodi,

Delete your post on this thread (click to edit it, then you can delete it). Hijacking a thread isn't cool. Secondly, when you post your own thread, be more specific. Otherwise your gonna get laughed off of here. Whats it doing, what have you tried, what engine is it, etc...

Once you delete your post I will edit the above portion off of this post, and we will try to help with your problem.

Adam

 

are you sure there are not 2 more connectors on that thing ,my 69 440 has all 3

 

That looks like a Chrysler alt. It should have one threaded terminal for a 7/16 nut and one small flat blade terminal on the back. They added another flat blade terminal in 1970 when Mopar switched to the newer style electronic voltage regulator. You will need a regulator, it does not have one internally.

 

Here are both the mopar Alt diagrams. Yours should have the Electro-mechanical

Your Alt should have the stud (Bottom) and the field term (top) like this picture.

The post will be on top in car and field on bottom. Photo upside down.

 

a quick google search and I found that they do have a chrysler 1 wire alt.. so it could be....
check out the powermaster web site
http://www.powermastermotorsports.com/mopar2.html

 

Uuhhh... that Post from PATODI is spam...

 

Yea grease it good and sit on it.

 

Thanks buddy. I was going to look for my MOPAR stuff and you nailed it.

 

Yeah jDj, That is the same one. I might have been confused by the backing, but mine looks the same. I appreciate the wire diagram. Is going to be hard to wire the alt in? It seems like it would be pretty self explanatory. And it looks as if there is a volt reg that is needed. So, I guess I will pick one up. Any idea what the amps are on the alt?

Brandon

 

Hey, also. Where can I pick a electromechanical reg. that is not so damn expensive? Anyone got one laying around their shop or garage that part with it?

 

Buy the VR706 Regulator from Autozone. $26 and its electronic instead of mechanical.

 

Big John, will that work the same as the mechanical?

 

Let me jump in here, the alternator pictured is a grounded field that uses a mechanical type reg. The Isolated field is very similar but the brush holder that is grounded to the case in the pictured one is instead insulated and has a wire plug in. THe isolated fields always use a electronic reg like in the diagram. The difference being the mechanical reg grounds excess voltage and allows only what is needed for the battery and accessories. The Isolated field regulates voltage by resticting voltage in and that controls output.It didn't come out as simple as I wanted it ,hope this helps.

 

Yep. Its a direct replacement. Used a few of these, works well.

 

So what is the deal that JoeCool is saying? That I have to get a mechanical in order to make it work? It's just seems as though he is explaining the difference. Which one is going to be fellas?

Brandon

 

25.00 and free shipping http://cgi.ebay.com/ebaymotors/NORS...r_Truck_Parts_Accessories&hash=item33634b03b0
Has 3 of them and good feedback

 

He's saying that there are two alternators shown in that diagram. One is a grounded field and one is an isolated field.

The isolated field is used in 1970 and up cars. Its sometimes (incorrectly) refered to as a "dual field". You have a grounded field (or single field) alternator. They use different regualtors. The 70 and up is a electronic regulator with no internal coil and points. The earlier regulator has the sometimes troublesome internal coil and points.

A good update, one I have used and seen used many times is to use an electronic regulator (like the VR706 I suggested) that is specific to use with the earlier alternator. It does give a more stable voltage output from the charging system and seems to be more reliable.

 

I have wired everything as the wiring harness kit instructed me to do. I am having trouble with the voltage regulator. It smokes if I have the key on for too long. I used the diagram that was provided to hook it up and a picture of the alternator.

Am I not getting a good ground? Is the regulator getting too much juice? Any help on the matter would be great.

Brandon
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Do yourself a favor & buy a quality regulator like Standard or Car Quest. Stay away from that Auto-Zone crap.