BUICK RIVIERA 1966: FUEL SYSTEM, GASOLINE:CARBURETOR SYSTEM

BUICK RIVIERA 1966: FUEL SYSTEM, GASOLINE:CARBURETOR SYSTEM

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Carb Advice: Rebuild or Replace Quadrajet??

Identification codes indicate the car or truck a carburetor was designed for and what transmission it was used with. ID numbers for a Rochester Quadrajet carburetor are found next to the throttle level. There should be a metal disc affixed to the carburetor for those in the to range, and the number was stamped into the unit without a metal disc on the later-year models.

[IMG] This info is from Cliff Ruggles, one of the best QuadraJet guys around. One must keep in mind when dating carburetors that the year of.

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How to Decode Rochester Quadrajet Carburetor Numbers

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Quadrajets has carburetor number located on a round aluminum disc Two digit plant code and four digit julian date (DDDY) may also be stamped in.

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CFM of quadrajet

Eldon, Missouri Note that this information covers the years — As we do not work on the newer carbs, we do not have sufficient books or experience to comment on the newer units. There are many codes both letters and numbers found on the Rochester quadrajet. Without getting into the actual numbers and letters, this article is an attempt to delineate the meanings of some of the codes.

The three main items, which seem to be of interest, are: A part number; B date code, and C plant code.

Mesh back for nice cool breeze Show off your Quadrajet Power stuff! In the pits, on the track, car shows, your shop, garage, dinner date or anywhere. MSRP.

The rochester two jet is a two barrel downdraft carburetor that was produced from until the late s. I have discovered that the existing Rochester 2-barrel carb will not work with my power brake system. This remanufactured marine carburetor is a “OEM” original two barrel Rochester marine carburetor. JEGS stocks a huge selection of carburetors from 2 to 4 barrel for circle track racing, street performance, muscle cars, drag racing and more! However there is a steel tube at the top of the carb that extends into the interior carb about an inch above the jets.

Sierra’s carburetor kits utilize superior ethanol-resistant materials matched with unsurpassed quality control.

Book Review: How To Build And Modify Rochester Quadrajet Carburetors

Most Rochester-built Quadrajet carburetors were given a four-number date stamp. Rock Auto sells a quadrajet for a ’69 Camaro for 1 plus a core. Longer, extended thread fittings give new life to worn castings by allowing fuel fitting to reach deeper into the casting to reach unused threads. The 7-digit part number ran around the outside edge of the tag.

Buy ARP Quadrajet Carburetor Stud Kit with 1/4″ Base Gasket: Main Bolts Thick terry cotton proves even greater breathability, Date first listed on.

From through , the venerable Quadrajet carburetor was used on many Chevelles ordered with standard performance engines, and those applications will be the focus of this article. Quadrajets were manufactured by Rochester a division of General Motors and Carter carburetors. Outsourcing carburetor production allowed delivery to meet demand as the Q-jet was used on other Chevrolet models and virtually every other GM nameplate as well.

With so many carbs in production for a myriad of applications, finding the right one for your Chevelle can be a challenge. There are a couple of locations containing the codes needed to identify your Quadrajet; both are located on the driver side of the carb body. Early Q-jets used a circular tag stamped with the codes found in a cavity in the side of the float bowl, while later carburetors used a stamping on the body of the carb.

Breaking down the carb codes is fairly simple once you have some basic idea of how the system is setup. All Carter-built Q-jets have “Mfd by Carter” cast into the carb body, although the carb numbers application codes are the same as Rochester-built carbs. Treat your classic Corvette to a professional dyno shop super tune. We upgrade the cooling system in our big-block—powered Camaro using a Frostbite aluminum radiator, dual SPAL electric fans, and a Weiand water pump.

Holley Spread Bore Vs Quadrajet

Discussion in ‘ The Bench ‘ started by Buicksky , Nov 23, Log in or Sign up. Hello you by the numbers experts. Would you mind explaining where and what format a 4 barrel Quadrajet date code would look like? My research is a little confusing that I have read. I easily located the carburetor number and a 2 letter code LK what number and or letter codes should I expect to find, and where should I be looking?

The early Model M (Monojet) and 4M (Quadrajet) used a circular tag in a cavity in a change letter, signifying changes during the model year, and a date code.

Note that if the metal tag reads Motorcraft instead of Autolite, then the carburetor is a service replacement. A check of the date codes will reveal a build date of or later. Bowl Cover. The following excellent write-up was provided by Dan Davis Rochestor Carburetor used on the CJ History Ford used this carburetor due to the increasingly strict Federal emission laws, as they did not have a low emissions carburetor ready for the introduction of the CJ.

Ford wanted to avoid the costs of fitting an A. Their choice was to buy cleaner running carburetors from a supplier who just happened to be General Motors. Notice the Ford auto trans kickdown lever green. Also note the dashpot on the throttle linkage side. It was used to avoid stalling by gently closing the throttle when then driver suddenly released the pedal.

Air-conditioning equipped vehicles used a solenoid in place of the dashpot. Its function was to prevent run-on a. This solenoid was powered with 12V when the key was in the ON position. It would raise the throttle shaft slightly off the idle screw, thereby controlling the idle speed.

re-jet your Quadrajet (part 1)



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