Quadrajet Choke Linkage

[Yeahrightgreer]

I’m putting back together an old Quadrajet for my Dodge pick up. I’ve got it all back together, but the last piece is this vacuum breaker to choke linkage, and I have absolutely no idea where it connects to. I know it obviously connects to the diaphragm on the back, but I don’t know where it would connect to on the choke itself.

Any ideas? Maybe someone could circle it in the photos for me?

 

[Woodruff Carbs]

Your first pic of it is inverted, but other wise the way it installs in relation to the first carb pic. Way underneath the choke housing is a hole for the little short end with the 90* to fit into from the inside with the end facing out. And the other side sits like the Letter U, and fits in the smaller slide linkage of the pull off. You will have to disconnect the pull off, hook it up, then bolt it back on.

 

[RJRENTON]

I’m putting back together an old Quadrajet for my Dodge pick up. I’ve got it all back together, but the last piece is this vacuum breaker to choke linkage, and I have absolutely no idea where it connects to. I know it obviously connects to the diaphragm on the back, but I don’t know where it would connect to on the choke itself.

Any ideas? Maybe someone could circle it in the photos for me?

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WHAT was the origional application for the Qjet? It seems that GM/Rochester had many variations of the basic design, by model year, as dictated by the engine/vehicle combination and emission control control requirements.
IMO...the Qjet is an excellent carb for sharp throttle response due to small bore primaries and large secondary bores for top end air flow. There were two major variations in capacity: 750 CFM and 800 CFM, However, one should be aware of the various adaptations: some models have pull over primary fuel feeds while some models have a secondary pull over fuel feed, in addition to the fixed metering orifices, which are difficult to tune for a specific application. Because of the efficiency of the triple stacked primary booster venturi, be aware of the POSSIBILITY of nozzle drip at higher idle speeds upsetting idle mixture, especially when a long overlap cam is involved. There are subtle differences in the cam that lifts the secondary metering rods in relation to the opening of the secondary air valves as well as the secondary metering rod hangers, both control both the RATE AND AMOUNT that the secondary metering rods move. In addition, the centralized fuel bowl has a rather limited capacity, necessitating a rather robust fuel delivery system to keep up with demand. With all that being said, it is still more versatile than the Carter T-quad because of the available tuning components.
Just my opinion of course...
BOB RENTON