Rochester carburetors by doug roe's book

This is a ed publication, so i cannot offer to post a copy of this chart, buy the book. If you want to use them because you are enlarging the passage from the jet to the well, i know doug roe s book advises enlarging that passage, but i havent bothered with that since 40 years ago the first couple times didnt seem to have noticeable effect. The qjet choke setup assumes that other engine parameters are correctly set up and tuned. Learn how your carburetor works and what changes give best economy or performance. They are complicated and not as easy to disassembleassemble as afb clones but every metering part is adjustable by turning screws or changing parts.

Rochester 2gc and rochester 4gc the stovebolt forums. Qjet mid throttle tuning chevy message forum restoration. An older book on rochester carburetors is doug roe s rochester carburetors, published by h. Almost any fuel injection is better, but as far as carbs go, the qjet is the highest evolution. Doug s books are great, but they assume you are a fluid dynamics engineer with a firm grasp on the design of the carburetor. I have been tuning quadrajet carburetors for many years, this book made me understand how they really work. I cant stress this enough, if you want more performance out of your qjet or just want a great how to rebuild reference, buy this book. Also details design, operation and performance modifications of current microcomputercontrolled. A good book that everyone who has a qjet should have is doug roe s rochester carburetors. If you are doing a qjet rebuild, roe is your book i was able to get through a qjet rebuild in a very measured, cautious six hours.

The rochester quadrajet uses an automatic choke system that is actually very good, if properly set up and adjusted. Its not light reading however, being very detailed and technically oriented. A guide to the comparative dimensions of these rods can be found on pp. The book will be a complete guide to selecting, rebuilding, and modifying the qjet, aimed at both muscle car restorers and racers. It is an invaluable piece of information that you shouldnt pass up. Again, one must know the carb type, size, and venturi diameter. Ive since acquired a cliff ruggles built qjet, a 9800 thermoquad and built my own 800 cfm 1979 qjet using cliffs and doug roe s book. My motivation to run the quadrajet came largely from roe s book. The title of this book is rochester carburetors, revised edition and it was written by doug roe. How to rebuild and modify rochester quadrajet carburetors by cliff. This is beautifully done, with all color photos on slick paper. Rochester carburetors, revised edition 9780895863010 by doug roe and a great selection of similar new, used and collectible books available now at great prices. People who have rochester carburetors would probably like doug roe s and david fishers book rochester carburetors quadrajet, two barrels, monojet, 4gc.

Diyers learn tech info from professionals like doug roe and cliff ruggles. If you can find doug roe s book titled rochester carburetors,you yourself can become the carb guru. How to rebuild and modify rochester quadrajet carburetors by. Dougs books are great, but they assume you are a fluid dynamics engineer with a firm grasp on the design of the carburetor. Learn how to rebuild and tune your rochester quadrajet. To begin with, rochester separates carburetors into groups a 2gc goes in the center of a tripower, a 4mc is a qjet. Try doug roe s excellent book rochester carburetors published by hp books in tucson, arizona. The doug roe book on rochesters, in the chart showing all the primary metering rods, shows the only triple taper rods ever made were rods 7040699 48c. Jun 29, 2011 unlike holley, rochester catered only to the o. I build olds 455 marine engines, and a welltuned qj is the only way to go bulletproof, accurate, reliable.

Rochester carburetors learn how your carburetor works and what changes gives best economy or performance. How to rebuild and modify rochester quadrajet carburetors book. It was published by hp books and has a total of 176 pages in the book. As this book was ed, and i do not have authority to reproduce the information, all i can do is cite the source. For years i had doug roes books on the shop workbench like a bible. Having read just about everything in print regarding rochester carburetors and having rebuilt somewhere between fifty and one hundred quadrajets. This item will ship to united states, but the seller has not specified shipping options. I have no idea of where my copy is, but this should help. Rochester carburetors, revised edition paperback january 1, 1987 by doug roe author 4. This is the best book on qjet modifications in existence. Now we use cliffs book as our go to book for information. If youd like to attempt building them yourself, start by getting a copy of doug roe s book titled rochester carburetors.

In this period rochester produced b one barrel, g two and four. Covers quadrajet, twobarrels, monojet, 4gc and computer controlled carbs with complete rebuild instructions, mixture settings, basic adjustments, tuning for street or strip and tips on manifolds and fuel systems. If any owner of one of these carburetors could confirm this, i would appreciate it i thought it was a typo at first, but it is specifically listed this way for both w31 and w30 applications. Find the paperback hp book by doug roe rochester carburetors amazon. It is a massive tome concerning every aspect of the quadrajet. Auto history preservation society tech pages article. Cartech published this book back in 2006, and it has served as a reference for many enthusiasts. This book, how to rebuild and modify rochester quadrajet carburetors, seeks to lift the veil of mystery surrounding the qjet and show owners how to tune and modify their carbs for maximum performance. See all 3 formats and editions hide other formats and editions. On the hangers, an early alphabet number is leaner, a later. I have doug roe s excellent book but it is the 1973 version so i guess this carb is actually newer than my book i am trying to build up a carb for my 350. Figures for many rochester carburetors can be approximated by using the chart from doug roe s book rochester carburetors. Headers and a fourbarrel carburetor on a jeep 225 v6.

You can also find gmdelco manuals online that are service manuals for quadrajets. I unearthed these figures courtesy of doug roe s classic work, rochester carburetors hp books, page 108 for approximate cfm flow on various 2g series carburetors. Rochester carburetors, revised edition by doug roe. Mar 29, 2014 doug roe was a rochester carb engineer for gm so he likely understood what he published. If not tuned right there is often a bog when the secondaries open. Get a hold of doug roe s book on rochester carburetors. Quadrajet jet sizes chevy message forum restoration. Actually, the power plant is running real good, no problems, most would accept as great feel engine could be a little smoother at idle out of gear though. Therefore, cfm ratings for individual carburetors were never published. Hope that helps, dayton umholtz, owner kinetic performance. Explains basic carburetion theory, service and performance techniques for conventional rochesters.

However, be advised that there was a model b produced during the 1960s and later which was used in many gm models. Pontiac grand prix questions can any of you pontiac. Doug roe s book on rochester carburetors fully explains the operation and tuning of the qjet. Id like to set up the 17082403 carb this way, and plan to buy doug roe s book. The pictures in roe are better, and the high quality paper makes it a little easier to read and handle as you work. However, there is a useful chart by throttle bore and venturi size in doug roe s book rochester carburetors.

The holes in the throttle body accomplish the same purpose, and are very well documented in doug roe s book rochester carburetors. How to build and modify rochester quadrajet carburetors. That is, doug roes ancient book rochester carburetors is better at explaining how the stock. I only ran it a little while and it performed well right out of the box. On your next boneyard run, scoop up all the quadrajet secondary rods and hangers you can for maximum tuning choice. This book contains everything you need to know about the qjets tuning, operation, quirks and where to get the right parts doug roe was back in the day an engineer for rochester carbs hint,hint saddly its been out of print for a. Heres, the definitive book on selecting, installing, tuning and modifying conventional and electronic rochesters. Buy a cheap copy of rochester carburetors book by bill fisher. Rochester carburators tnfs archive the autosport forums.

Can anyone tell me what the cfm rating was for a factory 2gc tripower from the late 50 s to early 60 s that came on 348s. That is, doug roe s ancient book rochester carburetors is better at explaining how the stock carburetor works, this one is better at telling you how to get the most out of them. The small primaries help them get good mpg at part throttle, the high cfm rating because of the large secondaries is good for top end power, and they are normally on top of the engine already. Doug roe s rochester carburetors is a good book that describes the quadrajet in detail. Pontiac street performance holley 4165 spread bore. Ive used it from time to time since then and have no complaints. Doug roe was a rochester carb engineer for gm so he likely understood what he published. Quadrajet jet sizes chevy message forum restoration and. Seller assumes all responsibility for this listing. Maybe just maybe the specs would be in doug roe s hp paperback 8 x 11 book rochester carburetors. Ultimately, this book was an interesting historical read about qjs, but in. Get doug roe s hp paperback 8 x 11 book on quadrajets.

Rochester carburetors detailed instructions and 650 illustrations show you how to rebuild and tune your rochester carb. Jun 15, 2006 for years i had doug roe s books on the shop workbench like a bible. Can anyone tell me what the cfm rating was for a factory 2gc tripower from the late 50s to early 60s that came on 348s. I recommend doug roe s excellent rochester carburetors published by hp books in tucson, arizona. How to rebuild and modify rochester quadrajet carburetors. For years i had doug roe s books on the shop workbench like a bible. The final tool in your asenal should be these two books. It has domed pistons, double hump heads, headers, solid lifters, and a cam of unknown specs. Jan, 2019 if you want to use them because you are enlarging the passage from the jet to the well, i know doug roe s book advises enlarging that passage, but i havent bothered with that since 40 years ago the first couple times didnt seem to have noticeable effect. We could look into your carburetor s dimensions and weigh what you currently have in flow rate. The carb worked flawlessly the first time, thanks to this.

I bought it new, right after i got my car 67 years ago. If you need to run a 4m for a specific racing class and want to optimize it, we suggest that you have your carb rebuilt by a professional. Although this overview of excerpts from that book doesnt cover all the information youll find within its pages, it will hopefully. Pontiac grand prix questions can any of you pontiac gurus. It covers more than the shop manual in so far as it explains the relationship between the carb and other engine components manifolds, timing, camshaft, etc. Hello all, i have two easy questions that i cant seem to find answers for anywhere. If you would like to read more about the quadrajet holley comparison, type the carburetor numbers and holley into a search engine. We would like to show you a description here but the site wont allow us. But before starting on the choke setup, its important to remember a few other tuning parameters. The most desirable secondary rods have very thin tips.

Rochester carburetors by doug roe and karen roe 1987. Doug roe s book goes through many other tweaking that can be done to the 4m to increase its potential. Every web seach on qjet info always brings a mention to his books. It has a ton of excellent photos and information really useful to a nonmechanic like myself. If you want to mess with it you should look into doug roe s book rochester carburetors.