Converting from external choke quadrajet to electrical choke quadrajet - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-02-2011, 05:32 PM
Registered User
 

Last journal entry: Got it running
Last photo:
Join Date: Jun 2006
Location: Arkansas
Posts: 191
Wiki Edits: 0

Thanks: 16
Thanked 6 Times in 3 Posts
Converting from external choke quadrajet to electrical choke quadrajet

I have a mostly stock 1968 cadillac. The original carb has the external heat riser choke. There is a coiled spring that sits down in the manifold. It is typically called a divorced choke. I have purchased a later quadrajet from a 1974(I believe that is how it decoded) cadillac. It is the later style electrical choke. I know it should be a pretty simple conversion, but I am not sure where to run wires to/from the choke. I think I can figure out the vacuum hoses out if I am careful on the switch over. So what do I do about the wires? Anything I should know about the vacuum lines?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-03-2011, 06:06 AM
SSedan64's Avatar
Registered User
 
Last photo:
Join Date: Dec 2007
Location: Macon, GA.
Age: 50
Posts: 6,016
Wiki Edits: 0

Thanks: 0
Thanked 46 Times in 46 Posts
Connect the + wire on Choke to a fused Ignition activated 12V+ source.
Don't tap + wires to Coil or Distributor.
There're 2 different style Choke connectors:
http://www.repairconnector.com/produ...rburetors.html
http://www.repairconnector.com/produ...-GM-Carbs.html

The Coil, Linkage & Cover on Intake can be discarded.


The Vacuum connections should be fairly easy.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-03-2011, 06:41 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Quote:
Originally Posted by silentpoet
I have a mostly stock 1968 cadillac. The original carb has the external heat riser choke. There is a coiled spring that sits down in the manifold. It is typically called a divorced choke. I have purchased a later quadrajet from a 1974(I believe that is how it decoded) cadillac. It is the later style electrical choke. I know it should be a pretty simple conversion, but I am not sure where to run wires to/from the choke. I think I can figure out the vacuum hoses out if I am careful on the switch over. So what do I do about the wires? Anything I should know about the vacuum lines?
I don't know if you were aware there is a conversion for this. The electric choke mounts down on the intake similar to the bi metal coil of the divorced choke and operates the choke by a link from the electric choke, same as the original divorced choke. This is a good deal if the carb you have is in good shape other than the choke.

Shown at the bottom of the page, no idea if your Caddy is among the "Many other applications available", but the difference will be mainly in the length of the arm up to the choke linkage at the carb- http://www.carburetion.com/quadrajet.asp
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-03-2011, 11:52 AM
Registered User
 

Last journal entry: Got it running
Last photo:
Join Date: Jun 2006
Location: Arkansas
Posts: 191
Wiki Edits: 0

Thanks: 16
Thanked 6 Times in 3 Posts
The old carb has issues with the inlet threads. So if you are meaning to convert the old one, I can't cheaply do that. The choke was ok on the old one mostly. Bought the new one pretty cheap, cheaper than having those inlet threads fixed. Right now with property taxes due I am having to stay as low buck as possible. I am going to have to put off a new fuel line too maybe till next month. I guess I blew my budget buying a alternator belt. Well that and a welder with my student loan money.

And thanks for the tip about the wire. At least I have wire and connectors that should work on hand.

The new one looks clean on the bores. Just cruddy on the outside when it got here. I am hoping I can avoid rebuilding it for awhile. And it shouldn't need much tuning as it was also off a 472. Now I know they are probably set differently, but shouldn't be as bad as say one off a small block chevy. And the nice thing is it also has the idle speed up for the ac that was mostly missing from the old one. One rod and part of the diaphragm was still there when I got it.

Thanks again for all the help and suggestions.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-03-2011, 01:38 PM
Registered User
 
Last photo:
Join Date: Mar 2011
Posts: 134
Wiki Edits: 0

Thanks: 11
Thanked 7 Times in 7 Posts
I always remove them.. I don't see how you would need a choke in Arkansas..
Reply With Quote Quick reply to this message

Recent Hotrodding Basics posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
quadrajet electric choke badmystur Engine 7 09-13-2010 06:25 AM
remove choke from quadrajet? 1964_442 Engine 5 10-16-2009 08:27 PM
Quadrajet electric choke. kegross1 Electrical 7 09-21-2009 08:01 AM
Need Quadrajet Choke & Carb Help? oscarlovel Engine 7 01-30-2008 07:11 PM
quadrajet w/electric choke ace1 Engine 6 12-22-2002 12:09 PM


All times are GMT -6. The time now is 02:26 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.