Dealing with a 77' q-jet (from a 350 chevy truck and on a 307 now) that has the APT screw located just forward of the main metering piston. Both computer controlled, and non computer carbs. Doesn't anyone know if that tool … Burroughs J-7292 set for 1958 Pontiac with 2GC $20.00 . These tools adjust various settings on Rochester QuadraJet, DualJet, & VaraJet carburetors on most GM vehicles having the 3C system.Weight: 3 oz. These are original tools, most used, but in like-new condition. I bought a kit with the proper tool to turn it, and a travel indicator/idle air bleed tool for $4 at Pep Boys (ask for a mixture adjusting kit, listed with the rebuild kits for the carb.) Idle Air Bleed This is a worthwhile piece to adjust properly too, especially if you have a lot of mods. The Quadrajet has 1 3/32- or 1 7/32-inch primary throttle bores with either 750 or 800 cfm. Other carburetors may have a 4 corner idle mix adjustment (4 idle mixture screws). Adjust this in 1/4 turn increments. Just what exactly does this do? Applications: 2mm double-D - VaraJet lean authority screw & idle air bleed; & DualJet & QuadraJet mixture control adjusting screw 2.5mm hex - DualJet & QuadraJet TPS adjusting screw 7mm double-D - DualJet & QuadraJet main … Visit our site for coupons and promotions. Part Number: MNP-08-0229 These mixture screws were factory set. Shop for Performance Tool Carburetor Adjustment Set Part #: W1185 for your vehicle. Burroughs J-7400 set for 1958 Buick with 4GC $30.00 . Some carburetors, such as the Quadrajet found in most GM vehicles, have a special screw and require a specific adjusting tool. Whatever works. The idle circuit adjustment screws have the ends that look like the blade of a screw driver sticking out. Our streetrod had a 350 SBC with a Rochester Quadrajet carb. Carburetor Adjustment Set; 6 of the most common 2 cycle, sma I have seen a slick little tool that fits right in the proper spot to adjust. I always adjust with a vacuum gauge, but I did adjust for high RPM years ago. My engine has a mild cam and 15 in. The Quadrajet uses a Double "D" carburetor adjusting tool. Adjusting a Quadrajet carburetor requires basic knowledge behind the theory and concept of this carburetor. Remove plug from air horn and adjust your part throttle mixture. Moving the screw down (clockwise) creates a leaner part throttle mixture. Get product details, choose a store, and get directions. of vacuum is about the best that I can do, but it runs very well. Burroughs J-7325 set for 1958 Pontiac with tripower $75.00 . It has been proven you can modify the Quadrajet to flow in excess of 1,000 cfm. In a nutshell, Quadrajet carburetors have different barrel sizes for its 2 primaries and 2 secondaries thus the term Quadrajet. Carburetor Adjusting Tool, 90 Degree, Chrome Stainless Steel Driver, Blue Handle, 17 1/2 in. Order by tool part number. When I first took the carb apart I had to really work to get it out … Place your order online today and pick it up in store at your convenience. I am in agreement the the Quadrajet carb is a great bit of engineering, as they went on so many different engines with different displacements. Length, Bits, Kit. This tool has been selected to fit over the APT (adjustable part throttle) screw in the Quadrajets with internal APT.
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