Cliff's Quadrajet Parts and Rebuild Kits
Quadrajet Problem Solving => Dialing in your rebuilt Quadrajet carburetor => Topic started by: novadude on December 06, 2013, 06:57:51 PM
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In reviewing the recommendations in Cliff's book, I see that most "recipies" involve resizing the air bleeds to 0.080", and using a larger main jet. I have one with 0.050" air bleeds.
I've build one of the SMAB carbs with a 0.050" bleed using 73 jets and 50M metering rods. It's on a mild Chevy 396, and it works really well. Getting ready to build another one of these for a 9.6:1 355 Chevy that pulls 14-15" at idle (217/225 deg cam). Is there any reason to run larger 75-77 jets and 0.080" air bleeds? I was thinking of leaving these at 0.050" and running the 73/50M combo that worked so well on the other carb. Thoughts? Pros / Cons of each set-up?
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Did you reduce the 2 main air bleeds in the air horn down to .050? Thats what I was wondering about in my post.
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Mine are already at 0.050". Factory calibration is 73 jet, 50M metering rod. The metering rods still have the 0.036" tips, so to answer your question, I think you ALWAYS need the 0.036" tip rods with the SMAB carbs. Maybe someone more knowledgeable can confirm.
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73/50M will be fine with the smaller MAB's....Cliff