Moparchat - Home of MOPAR enthusiasts worldwide!



Go Back   Moparchat - Home of MOPAR enthusiasts worldwide! > Technical Forums > Performance Talk

Click here to search for Mopar cars and parts for sale.


Reply
 
Thread Tools Display Modes
  #1  
Old 02-17-2007, 08:02 PM
Steelmuscle Steelmuscle is offline
Inactive User
 
Join Date: May 2003
Location: Council Bluffs, Iowa
Age: 59
Posts: 80
Default Single to Dual Field Alternator Swap

Just picked up a new alternator from the local parts store. This unit is suppose to be for a '69 single field car. When I got it home I noticed there were two field wires instead of one. I did a search and found that the dual field can be used. I can simply ground out any one of the field wires, then connect the single wire from the harness to the other? My regulator is the square original black box. I will attempt to attach a photo. The unit on the right is my original unit and the one on the left is the new dual field. The terminal at the 7:00 position might be the easiest and still use the 4:00 terminal as the original unit did.

I plan to have the stock pulley removed and a March pulley pressed on. I want to be sure I get the grounding right before I swap pulleys. Any help???
Attached Images
File Type: jpg Copy of DSCN5490 (Custom).JPG (79.3 KB, 15 views)
Reply With Quote
  #2  
Old 02-17-2007, 08:43 PM
ehostler's Avatar
ehostler ehostler is offline
Registered User
 
Join Date: Jan 2000
Location: Annandale, VA
Age: 57
Posts: 15,212
Default

Grounding either field lead will do the trick.

I'm not sure why you want the March pulley. They are normally under drive pullies. These old MOPAR alts had a hard time keeping up at low engine RPMs. Adding an under drive pulley will only make that worse.
Reply With Quote
  #3  
Old 02-17-2007, 08:49 PM
mrbill426's Avatar
mrbill426 mrbill426 is offline
Inactive User
 
Join Date: May 2004
Location: Port Orchard, WA
Age: 69
Posts: 116
Default

Is that why my headlights always dim at idle...Is there a "fix" for that. They brighten up fine when the engine revs, and the battery never goes dead.
Reply With Quote
  #4  
Old 02-17-2007, 10:29 PM
Steelmuscle Steelmuscle is offline
Inactive User
 
Join Date: May 2003
Location: Council Bluffs, Iowa
Age: 59
Posts: 80
Default

I'm wanting to convert to the serpentine set-up. Not sure if this particular pulley is under driven??
Reply With Quote
  #5  
Old 02-17-2007, 10:41 PM
ehostler's Avatar
ehostler ehostler is offline
Registered User
 
Join Date: Jan 2000
Location: Annandale, VA
Age: 57
Posts: 15,212
Default

Oh no Mr. Bill... If the car appears original, you probably don't want to take away from that. So a smaller pully will help with that. The down side of a smaller pulley is the extra RPMs that the alt spins, at higher engine speeds.

If originality isn't an issue, then the new ND alt (found on most mini vans, trucks, and jeeps) is a great cure.
Reply With Quote
  #6  
Old 02-17-2007, 10:47 PM
dave571's Avatar
dave571 dave571 is offline
Inactive User
 
Join Date: Feb 2001
Location: carstairs,alberta,canada
Posts: 2,809
Default

As ed has indicated, the second lead can be grounded. Here's some info

http://www.davesmopar.com/techreg.htm
Reply With Quote
  #7  
Old 02-17-2007, 10:53 PM
mrbill426's Avatar
mrbill426 mrbill426 is offline
Inactive User
 
Join Date: May 2004
Location: Port Orchard, WA
Age: 69
Posts: 116
Default

LOL..thanks for the tip, ED

Bill
Attached Images
File Type: gif MBSpinSml.gif (82.8 KB, 11 views)
Reply With Quote
  #8  
Old 02-18-2007, 01:16 AM
64dartwagon 64dartwagon is offline
Inactive User
 
Join Date: Mar 2004
Location: North Highlands/Ca
Age: 50
Posts: 447
Default

Quote:
Originally Posted by ehostler View Post
If originality isn't an issue, then the new ND alt (found on most mini vans, trucks, and jeeps) is a great cure.

Anyone have a schematic and some helpful tips, and pics. I hate the whole discharge at idle peg the needle to charge at 1500rpm.
Reply With Quote
  #9  
Old 02-18-2007, 02:45 AM
ehostler's Avatar
ehostler ehostler is offline
Registered User
 
Join Date: Jan 2000
Location: Annandale, VA
Age: 57
Posts: 15,212
Default

Take a look in the tech archives. There is an entire thread about upgrading. That thread references the 130 Amp ND unit. You can use lower output ND units and still get great results.

Being where you are, there are several auto salvage yards to rape the alternator from. My favorite used to be Mather Auto Dismantlers. They had lots of old MOPARs.
Reply With Quote
  #10  
Old 02-18-2007, 03:10 AM
64dartwagon 64dartwagon is offline
Inactive User
 
Join Date: Mar 2004
Location: North Highlands/Ca
Age: 50
Posts: 447
Default Yeah they

Yeah they used to have alot. But now there percentage is down to about 5% mopars if that. I like them as I was able to get a disc 9" complete from lugnut to lugnut for $60. Try that now anywhere.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
69 fury alternator single field claudius69fury Power Adders 7 11-12-2009 12:57 AM
Dual field or single field alternator racintracy Performance Talk 17 09-05-2004 12:01 AM
dual-field alternator deadhorse66 Performance Talk 6 10-21-2002 01:31 AM
Single field to dual field Frank R Performance Talk 4 08-27-2002 09:26 AM
Dual Field Alternator in a Single Field Setup 1969RR Performance Talk 10 01-04-2001 12:34 AM




All times are GMT -4. The time now is 09:31 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
. . . . .