HomeReviewsMediaBooksHow to Rebuild and Modify Rochester Quadrajet CarburetorsReady for Assembly

How to Rebuild and Modify Rochester Quadrajet Carburetors

Ready for Assembly

Chapter 5 takes you through the entire rebuild process of a Quadrajet — but really, every part of How to Build and Modify Rochester Quadrajet Carburetors makes important contributions to the procedure.

In the above photo, all of the components of a Q-Jet are laid out prior to assembly — each one repaired and restored. If you're a Chevy guy or gal and thinking those secondary air valves sure do look weird, it's because — as Cliff Ruggles explains in the following chapter — this is an early Pontiac carburetor that used those slots to provide better throttle response when the secondaries are opened by allowing a path for the secondary accelerator enrichment passages direct access to the intake (the openings for the secondary accelerator passages on most Quadrajets are above the air valves rather than below where they are more useful — again, you can thank the author for all this info, because I didn't know that before reading this book, but it makes perfect sense). The slotted air valves were eventually discontinued because they caused issues with air control. Photo: Cliff Ruggles.

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