General Category > Quadrajet Carb Talk and Tips
Float level and other Qs
Macadoo:
Air horn, bottom, has six tubes.
Cliff Ruggles:
Our basic kit will have all the gaskets, plus the high flow N/S assembly and HP pump at no additional charge. A much better bargain than buying the gaskets separately and you'll need the better N/S assembly and pump for the big 455 anyhow......Cliff
Macadoo:
Sounds good, Cliff. But I still don't have a carb number to plug in.
Cliff Ruggles:
Doesn't matter I can see enough in the pictures to provide the correct gaskets, the N/S and pump are universal......
Macadoo:
Thanks Cliff, that helps.
I've been reading the Q-jet tuning article by Lars Grimsrud, particularly the table that contains the factory jetting for different motor combos. It seems that the higher compression motors from the late 60s were setup leaner (and meaner?) than the 70s EGR units. The EGR motors ran very rich with jets as big as 77. For example; a 1974 Vette with a 454 BB motor ran 75 jets with a 39 rod (manual trans).
My question is; how does a more aggressive cam change the jetting? More lift with more duration would move more fuel, would it not? I was thinking of installing 74 jets with 49B rods (this is the 1705 era carb) but now I'm thinking that would be too lean. I don't wan to burn my new valves :-\
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