How to Rebuild And Modify Rochester Quadrajet Carburetors

by Ruggles, Cliff

• ISBN13: 9781932494181
• ISBN10: 1932494189
• Format: Paperback
• Copyright: 2006-07-15
• Publisher: Cartech Inc

Summary

The Rochester Quadrajet carburetor was found perched atop the engine of many a classic GM performance vehicle. The Q-Jet is a very capable but often misunderstood carb. This book, How to Rebuild and Modify Rochester Quadrajet Carburetors, seeks to lift the veil of mystery surrounding the Q-Jet and show owners how to tune and modify their carbs for maximum performance. The book will be a complete guide to selecting, rebuilding, and modifying the Q-Jet, aimed at both muscle car restorers and racers. The book includes a history of the Q-Jet, an explanation of how the carb works, a guide to selecting and finding the right carb, instructions on how to rebuild the carb, and extensive descriptions of high-performance modifications that will help anyone with a Q-Jet carb crush the competition.

Author Biography

Cliff Ruggles, a retired veteran, owns a business building high-performance engines, transmissions, and carburetors.  He has a strong passion for automotive performance and has built, owned, and raced at least half a dozen cars through the years.

Table of Contents

Preface	4	(1)
Introduction	4	(2)
History	6	(13)
Carburetor Numbering	15	(4)
How Quadrajets Work	19	(21)
Main Components	21	(2)
Venting	23	(1)
Fuel Inlet	24	(1)
Float	24	(2)
Idle System	26	(4)
Primary Main Metering System	30	(4)
Secondary System	34	(3)
Choke System	37	(3)
Selecting the Right Carb	40	(15)
What Are the ``Best'' Quadrajets?	41	(2)
Inlet Position	43	(2)
CFM	45	(1)
Linkage	45	(2)
Vacuum Fittings	47	(4)
Choke Pull-Offs	51	(1)
``Remanufactured'' Quadrajets	52	(1)
What Quadrajet Do I Use?	53	(2)
Tools and Safety	55	(15)
Safety Equipment	55	(1)
A Place to Work	56	(1)
Basic Hand Tools	57	(3)
Drill Bits	60	(2)
Sand/Media Blasting	62	(1)
Air Tools	63	(1)
Propane Torch/Oxygen Acetylene Welder	64	(1)
Carburetor Cleaners and Solvents	64	(1)
``Special Tools''	65	(4)
Measuring Devices	69	(1)
Rebuilding the Carb	70	(18)
Bottom Plugs	70	(2)
Warped Air Horn/Main Body	72	(1)
Stripped Fuel Filter Housing Threads	72	(1)
Loose Throttle Shafts	73	(1)
Taking the Carburetor Apart	73	(5)
Cleaning the Parts	78	(1)
Base Plate	79	(5)
Air Horn	84	(2)
Rebuild Kits	86	(2)
High-Performance Modifications	88	(29)
Base Plate Modifications	88	(5)
Modifying the Idle System	93	(4)
Primary Main Fuel System	97	(2)
Basic Rules for Primary Jetting	99	(1)
Power Piston Springs	100	(1)
Accelerator Pump	100	(1)
Fuel Inlet Seats	101	(2)
Floats	103	(1)
Pullover Enrichment System	104	(2)
Secondary Emulsion Tubes (Air Bleeds)	106	(1)
Secondary Air Flaps, Shaft, Hanger, and Metering Rods	107	(2)
Choke Pull-Offs	109	(2)
Recipe for Success	111	(4)
Full-Race Carburetors	115	(1)
Removing the Primary Booster Rings	116	(1)
Edelbrock Q-jets	117	(6)
Appendix A: Quadrajet Secondary Metering Rods	123	(3)
Appendix B: Quadrajet Components	126