Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor
17059272 on a ford 300
F250 Restorer:
--- Quote from: Shark Racer on December 04, 2012, 06:42:41 PM ---Your comment on the manifold confuses me; dual ports that separate the primaries from the secondaries in the manifold? If this is the case, then you'd have to have two sets of intake runners to each cylinder, one for primary feed and one for secondary feed...
Is there any chance you can post pictures of this setup?
--- End quote ---
Hello. This is an inline six engine, so the intake hangs off the side of the head. Offenhauser makes the dual port intake. If you look into the runners where they bolt to head, they are divided top from bottom, about 33% for the primaries, and the remainder for the secondaries. It is my understanding that v8's have something similar: the Dual Plane intake?
If you go on ebay and search for ford 300 intake, surely there will be photos.
Cliff, thanks for walking me through all this. One by one I'm getting the kinks worked out. Can I change to an airhorn with solid nozzles? Or can i change the nozzles by applying heat and pulling out?
Shark Racer:
I'll do some research. On a dual plane, the left side of the carb goes to 4 cylinders and the right side goes to the other 4. That is where I'm getting confused. What you've said explains it. Interesting!
F250 Restorer:
Here is a pretty good shot of the intake.
F250 Restorer:
Have you done a "tip-in" test with the APT screw? Set it for 100-150rpm's increase when the choke flap it tipped in slightly. This will be slightly lean, but should delivery good mileage
Cliff, when I do that test, do I raise the rpm to cruise level?
thanks.
Cliff Ruggles:
I'd set the rpms right at 2000 for the "tip-in" test.....Cliff
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