Lowest prices on quadrajet performance carburetors guaranteed. It is a good carburetor for fuel economy and still has stellar performance when required. There should be a metal disc affixed to the carburetor for those in the 1965 to 1968 range, and the number was stamped into the unit without a metal disc on the later. The quadrajet is a four barrel carburetor, made by the rochester products division of general motors. The main metering system supplies fuel to the engine from offidle to wide open throttle operation. We were too focused on doing body work to worry about the engine at first. The quadrajet rebuilt in this video is of the 1979 era. Nov 23, 2014 the quadrajet rebuilt in this video is of the 1979 era. The rochester quadrajet carburetor is probably the bestkept secret we chevy folks have. The primary fuel inlet side has small 8 bores with a triple venturi setup equipped with plain.
Some quadrajet carburetor designs vary from year to year however the process will be similar. Rochester aa carburetor manual rochester b, bc, bv, aa, bb carburetor manual be patient, this is a large file. Free carburetor repair manuals mikes carburetor parts. Comprehensive factory service information for rochester quadrajet m4mc carburetors. Technical information bulletin the corvette restoration. Quadrajet casting number chart cliffs high performance. When they say revised edition, the mean that they took out all of the 4gc and 2barrel technical information to save money by printing a quadrajetonly book with fewer pages. Your guide to the most popular rochester carburetors. Rochester 4mv carburetor quadrajet the first gen site.
Rochester quadrajet carburetors up to and including the 1967 model year were identified by a round, pressedin aluminum bottle cap tag on the drivers side of the float bowl near the front. Rochester carburetor numerical index carburetor kits, parts. Rochester quadrajet installation these instructions cover all quadrajets. Quadrajet rebuild instructions for qjet carburetors cliffs. This book, how to rebuild and modify rochester quadrajet carburetors, seeks to raise the veil of thriller surrounding the qjet and present house owners how to tune. Rochester quadrajet throttle arm modification for the 2004r swap economy and performance the rochester quadrajet offers the best of both worlds. Photo 3 the quadrajet is considered a threepiece design. The rochester quadrajet, in its various forms and configurations, has been used by various gm divisions for various applications since the mid sixties. Quadrajet rebuild instructions for qjet carburetors. The idle mixture screws are located in the base plate for superior idle quality.
Detailed quadrajet carburetor rebuild complete guide. It has been proven to be dependable and a versatile. The rochester quadrajet, in its various forms and configurations, has been used by various gm divisions for various applications since the mid. Rochester varajet carburetor rebuild kit b related products. Rochester quadrajet carburetor tech article chevy high. How to rebuild modify ford flathead v 8 engines motorbooks workshop. Unfollow quadrajet carburetor to stop getting updates on your ebay feed. The gc carburetor came in 2 cfm sizes, measured by throttle bore. The manual is in two formats regular html pages with jpeg images of the scanned pages and pdf files.
Other products in the varajet carburetor rebuild kits. American cars and trucks, import cars and trucks, antique cars, classic cars, muscle cars. 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. Rochester bc published in 1951 rochester dualjet carburetor manual rochester e2se carburetor manual rochester e4mee4mc service manual rochester monojet carburetor manual rochester triple power pack manual rochester quadrajet. The quadrajet is a four barrel carburetor, made by the rochester products division of general. The quadrajet carburetor has two stages in operation. How to decode rochester quadrajet carburetor numbers it. It is a good carburetor for up to close to 400 horsepower. Ethanol blends in gasoline today are responsible for many fuel system issues and carburetor failures on older corvettes.
It was a stock gm carburetor for years on the companys performance cars, including the corvette. Rochester quadrajet identification 70 41 2 6 7 example. The rochester quadrajet carburetor was discovered perched atop the engine of many a basic gm efficiency car. This 4 barrel carburetor was used from 19651990 and replaced the rochester 4 jet. Rochester quadrajet carburetor mikes carburetor parts.
Quadrajet carburetor 4mv4mcm4mem4mc service manual 9d5. Rochester quadrajet carburetor manual rochester quadrajet carburetor manual if you are looking for a book rochester quadrajet carburetor manual armbxvy in pdf. Quadrajet carburetor 4mv4mcm4mem4mc service manual. The quadrajet carburetor has two distinct and sepa rate design stages. This float fits these general motors factory issued rochester quadrajet carburetors 4mc, 4mv, m4m. Buick 19681974, checker motors 1970, 197277, chevrolet 196974, chevrolet. Quadrajet overall analysis the rochester quadrajet has its good and bad points as mentioned above, but overall it is a tireless workhorse that delivers great performance and bulletproof reliability. Replacement rochester quadrajet carburetors installation and troubleshooting guide 19681981 corvette thank you for choosing mid america motorworks for this high quality remanufactured rochester quadrajet carburetor. All rochester products identified by a o70o or o170.
The vent valve seats a pas sage which lebds from a point in the carburetor bore just above the throttle valve to an external bleed hole at the side of the throttle body easting. The next letter, v, c, or e stands for the type of the chokes thermostatic coil. Brass replacement for rochester 7037316, 7037705 and ford d0oz9550a. Id numbers for a rochester quadrajet carburetor are found next to the throttle level.
The service procedures recommended by rochester products division and described in. Dec 27, 2012 under the hood, it had a small block 350 v8 engine with a rochester quadrajet carburetor. Brass float rochester quadrajet carburetor 4mc 4mv m4m 7037316 7037705 d0oz9550. When they say revised edition, the mean that they took out all of the 4gc and 2barrel technical information to save money by printing a quadrajet only book with fewer pages. The procedures recommended by rochester products division of general motors and described in this service manual are effective methods of performing service operations. Most rochester built qjets used a fournumber julian date code. In the summer of 2011, i decided to take a look at the rebuilding the carburetor. Rochester quadrajet, 4barrel carburetor rebuild kits and parts. Includes theory, diagrams, detailed specifications, tuneup data and complete overhaul procedures. The quadrajet is a progressive fourbarrel design with an air valve actuated secondary circuit. Rochester aa carburetor rochester b, bc, bv, aa, bb carburetor manual be patient, this is a large file. Most will have 78 inch 20 fuel inlet till 1971 and 1 inch 20 after 1971. The first three numbers are the day of the year the carburetor was built. Small primary bores with triple venturis offer excellent throttle response and fuel economy.
All carburetors are installed on our test engine prior to shipping. The rochester quadrajet is a four barrel, two stage carburetor of down draft design. This test is performed to ensure that all idle circuits and other carburetor functions are working properly. Apr 28, 2016 when discussing quadrajet models, the number 4 means a fourbarrel carburetor. So before you start removing this and that and the other, you want to educate yourself, as much as possible, on the process of disassembling and then reassembling a rochester quadrajet carburetor. You can count on us to have that hard to get carburetor, because we have over 250,000 carburetors in our inventory, so be assured we will have the carburetor you need. The last passenger car version of the carb appeared as an ecmcontrolled carb in 1981. Electric choke kit rochester quadrajet 4 and dualjet 2 bl carburetor replacement. Rochester bc published in 1951 rochester dualjet carburetor rochester e2se carburetor rochester e4mee4mc service rochester monojet carburetor rochester triple power pack rochester quadrajet carburetor rochester varajet carburetor. The rochester 4mv quadrajet has a number of revisions for 1971 which include. Rochester quadrajet carburetor manual rochester quadrajet carburetor manual if you are looking for a book rochester quadrajet carburetor manual armbxvy in pdf format then youve come to the right website. The qjet is a really succesful however typically misunderstood carb.
When discussing quadrajet models, the number 4 means a fourbarrel carburetor. Rochester quadrajet 4 barrel carburetor parts carburetor. So, a 4m is a quadrajet, and a 2m is a twobarrel dualjet. Some of these service operations require the use of tools specially designed for the purpose. The quadrajet carburetor has a centrally located fuel chamber in the float bowl. They started making them in 1965 and ran threw 1974. The quadrajet carburetor has two bores which feed fuel and air. Quadrajet m4me exploded view secondary metering rod info. No selfrespecting mustang hugger is gonna think your car runs hard when you. If the carb is a carter manufactured under license from rochester, the number will be inside a round metal foil tag on the drivers side of the carb just above the primary throttle linkage. Because there are so many different combinations, we cannot possibly duplicate the vacuum signal. The quadrajet carburetor has two distinct and separate design stages.
Starting in 1968, the number was stamped on the drivers side of the float bowl above the secondary throttle shaft. Removal, disassembly, rebuild rookie level the thread discusses the removal, complete teardown, cleaning, rebuild kits, rebuild process, reinstallation, and tuning of a quadrajet 4mv model. Rochester quadrajet, 4barrel carburetor rebuild kits and. Use your carburetor number to match with the correct carburetor kit. To make restoring these great old cars easier, weve scanned in the entire rochester carburetor service manual covering the years 19321980 and were presenting it here for free. You will also find detailed service manuals for specific. Its last application was on the 1990 oldsmobile 307 v8 engine, which was last used in the cadillac brougham and full size station wagons made by chevrolet, pontiac, oldsmobile, and buick. It is a r44mc the 4mc is a hot air side mounted choke rochester quadrajet 4 barrel carburetor, which means the choke is located on the passenger side connected to the carburetor and draws hot air from the intake. Troubleshooting a quadrajet carburetor it still runs.
Under the hood, it had a small block 350 v8 engine with a rochester quadrajet carburetor. Pdf i just replaced my old rochester carb with new. From street restoration to full race carb tuning, parts to quadrajet rebuild instructions, we have it. The rochester quadrajet has evolved to the point of being an efficient and sophisticated fuel control device that is right for the times and yet maintains the serviceability that is so important to those responsible for vehicle performance and customer satisfaction. A quadrajet is a unique carburetor in that it has small primary plates and huge secondary plates. The qjet is a very capable but often misunderstood carb. Rochester 4gc carburetors performance tuning 4gc carbs suffer from being passed over for mods during the heyday of muscle cars because the quadrajet and holley. With years of qjet experience and hundreds of satisfied customers, our carbs are track proven and dyno tested. The rochester quadrajet carburetor was found perched atop the engine of many a classic gm performance vehicle. Rochester quadrajet carburetor parts, including carburetor kits and other parts associated to the quadrajet carburetor. Rochester quadrajet parts jet performance products. How to rebuild a rochester quadrajet 4mv carburetor. There should be a metal disc affixed to the carburetor for those in the 1965 to 1968 range, and the number was stamped into the unit without a metal disc on the lateryear models. Its first application was the newfor1965 chevy 396ci engine.
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