Cliff's Quadrajet Parts and Rebuild Kits
Quadrajet Problem Solving => Quadrajet Parts and Numbers => Topic started by: Schurkey on June 12, 2009, 04:13:22 PM
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I went to my favorite salvage yard looking for decent core carbs. Came home with two; and expect to find others once the ground dries up and I can drive through the rows of vehicles instead of confining my search to a couple of sheds filled with carbs.
Most of the carbs stacked on shelves in the shed are missing the choke coils, my two cores included.
There are a batch of DualJet carbs, some of which have the electric choke coils still mounted.
1. What is the typical resistance of an electric choke coil? My ohmmeter shows anywhere from 4 ohms to multi-thousand ohms; I'm sure some of those choke coils that I measured were defective.
2. Are DualJet choke coils interchangeable with Q-Jet coils? I'm sure they are. The electrical connector retaining tabs on the coils on some--but not all--of the DualJets looks to be really huge. The mating connector must be a monster.
3. Anyone need a DualJet carb? This place has a dozen or more just sitting on shelves. EVERY DualJet I looked at had the larger venturi arrangement similar to the "800 CFM" Q-Jets. There's a DualJet 165 (looks like a '74-older Q-Jet including a full-size casting where the "secondary" side is blank--no throttle plates, and no opening air valve; a DualJet 200 which looks like a '75-Newer Q-Jet and has a similar full-size casting with the blank secondary side; and a batch of DualJet 210 which are similar to the '75-Newer Q-Jet primary side, but the 210 is a smaller casting that doesn't have the secondary area at all.
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Some comparison photos of the DualJet carbs. Note that the photos are of carbs from a salvage yard, and taken on-site--thus the lovely grass and dirt backgrounds:
(http://hbassociates.us/DualJet165Top.jpg)
If you look really close, "DualJet 165" is cast into the area where the secondary air valve would be on a Q-Jet.
(http://hbassociates.us/DualJet200Top.jpg)
Choke blade is missing
(http://hbassociates.us/DualJet200bottom.jpg)
The DualJet 165 is similar.
(http://hbassociates.us/DualJet210top.jpg)
(http://hbassociates.us/DualJet210Bottom.jpg)
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The choke coils will fit, use an lead from a positive battery post to the connector, then ground the housing on the negative battery post. If it doesn't heat up in 3 minutes, it's JUNK.....Cliff
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The choke coils will fit, use an lead from a positive battery post to the connector, then ground the housing on the negative battery post. If it doesn't heat up in 3 minutes, it's JUNK.....Cliff
You don't recommend an ohmmeter to test them?
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Nothing better than a real test, as I don't fully trust electronic testing devices for these sorts of things. The range is simply too wide. If the unit doesn't heat up quickly, or heat up at all, it's toast!....Cliff