There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). *New Airhorn Gasket7. Then close throttle. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. See figure 9F-2. This eliminates any bog or hesitation when acceleration. Watch this. When done you should see very little daylight around the valve. This restricts the flow of fuel. You can also check the adjustment by measuring (F) which should be 18/64. Seat the discharge check by tapping lightly in the hole to form a good seal. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Master Technician Tool Set (early, circa 1935, for 1923~1935 Carter carburetors all makes - most tools then current) Carter Master Technician Tool Set about 1951. As the accelerator is released and the primary throttle plates are closed to the idle position, the upward movement of the pump plunger and attached spring bracket exerts tension on the spring and tends to stabilize the float in a level position. Test the needle by holding it down gently with a brass drift punch. The accelerator pump circuit resides on the primary side of this carburetor. Your friend will receive an email from you with a link to our site. Carter WCFB 4 Barrel Adjust Float. Make sure the pontoons are centered and will not rub the bowl sides. This allows air instead of fuel to be drawn off the pump jets. Disassembly2. There should be a retainer keeping the check ball in place. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. Adjusting the WCFB float level and float drop. Recheck float adjustments. You cannot go wrong with Mikes carburetor in any way. Ultra-Sonic Cleaning3. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . As the accelerator is released and the primary throttle plates are closed to the idle position, the upward movement of the pump plunger and attached spring bracket exerts tension on the spring and tends to stabilize the float in a level position. The main body is partitioned into two compartments (primary and secondary), each containing a double pontoon float and lever assembly and a needle valve and seat. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. The flat surface of the pump arm should be parallel to the straight edge. Carter WCFB Rebuild kits: Rebuild Kits. Anti-Rust "Dichromate" Finish**4. Make sure there is a check needle below the main discharge. In this video we are going to show you how to do the various adjustments on both the Air Bled and the Solid Fuel type of BBD carburetors. Back out throttle stop screw until throttle valves seat in bores. I have repeated multiple times with same results. Measure from center top surface of pontoons to air horn. Can't find the answer you're looking for? Press down on vacuum piston link C until metering rods bottom in the carburetor body. This restricts the flow of fuel. The balance passage also tends to prevent flooding in the event one of the needles should temporarily become stuck open by maintaining equal fuel level between the two float chambers. Seat the intake check by tapping lightly in the hole to form a good seal. Make sure these are clear if you have percolation problems. On 1956 models one point rich. Rotate throttle stop screw E until engine idle at approx 500 RPM. Coat threads of screw with sealing compound and install it. They are staked in the hole. It should not be opened up. The metering rod adjustment should be done after the pump adjustment. This check prevents excessive pressure in the discharge passage during acceleration. Someone has installed it improperly. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. WCFB carburetors, althqugh basically all units are allke. When removing valves they should be marked so that they get put back the same way. When I slow down to an idle, my engine runs rough. Make sure manifold heat control valve is free. features a Carter carburetor identification page and a function that allows you to conduct a search by entering an identification number Factory Carter AFB CFM Ratings Chart Rebuild pics The April 15th, 2019 - The carbs with 1 1 4 venturies and 1 7 16 primary bores and 1 11 16 The piston is brass and can be damaged very easily. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. The discharge check is seated at this time to prevent air being drawn into the pump well. Ethanol gas does not have much if any lubrication. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Hold air horn upright with floats hanging. parts. 1963-64 Studebaker Carter AFB 1962-1965 Chevrolet 327 and 409 engine carburetor manual 1958-1968 Lincoln carburetor manual AVS 1966 Chevrolet 327 and Marine Carter AVS carburetors BB Ball and Ball Single Barrel downdraft manual: 1939-60 Chrysler, Dodge, Plymouth Carter BB, BB1, BB1A and BB1D updraft Carter BB for IHC BBD Do not depress float lip against spring in needle, but let float rest of its own weight. A stand pipe is provided at both needle seats as an additional trap for foreign material that might prevent the needle valves from seating properly. The single step rods were used on some of the price leader carburetors (i.e. Ideas?? Can't find the answer you're looking for? Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. If a loss of rpm is noted, or if the engine dies, and air leak exists. *New Float6. Aspringis inserted in the power piston hole, then the piston. With choke valve tightly closed, tighten fast idle adjusting screw (K) (on high step of cam) until there is the clearance as listed on carburetor specification page between throttle valve and bore of carburetor, side opposite idle port. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. Rotate throttle stop screw E until engine idle at approx 500 RPM. Pulloffs : CUFWCFB2 $ 0 . 1955 Pontiac - Loading or Carburetor Flooding Both valves should be closed. Change the choke setting to index. It needs to go up and down easily.Is there aspringunder the power piston?Are the venturi cluster gaskets sitting flat and not curled over? Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). Rotate screw C, or bend tang, until throttle valves are open the distance listed in, With throttle valves held wide open, there should be a clearance between upper edge of choke valve and the inner wall of air horn (. William C. Carter was born in Union City Tennessee in 1884. The WCFB carburetor which came on some of the earliest The download link can be found on your order confirmation email which you will receive as soon as you complete the order. With engine running, check for an air leak at front left corner of carburetor between throttle body and bowl by squirting carb cleaner at this point. Adjust by bending lip of float, not float arm. Metering rods for the WCFB have been out of production for several years now. Fig. Outside top of early Carter tool box with correct decal. Some have a coating to give it a better shelf life. Once engine speed gets high enough, the carburetor vacuum is strong enough to pull fuel through the main jet and the accelerator pump circuit is no longer used. The download link will expire in 30 days. When that is the case, I bend the accel. Check the low speed jets to make sure they are clear (#44). Fuel is puffing out nozzles on primary circuit at idle on primary carb of a dual carb set carbs were just rebuilt what is the cause. Solid fuel has the 2 tubes pointing up. The balance passage also tends to prevent flooding in the event one of the needles should temporarily become stuck open by maintaining equal fuel level between the two float chambers. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Adjust by bending float arms, making sure both pontoons on each float are the same height. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. 1955 Chevy Hard starting after flooding. Ultra-Sonic Cleaning3. Procedure is as follows: with the throttle lever set screw backed out and throttle valves seated in bores of carburetor, press down on vacumeter link (D) until metering rods bottom at (E). Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Carter carburetors fitted with air bleed idle mixture adjustment also have fuel emulsion mixture needles, but these are sealed at the factory to limit the amount of fuel admitted during idle. The adjustment of the pump is important in order to get the required fuel. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. A bushing (sorry dont have size) can be permanently installed in the choke vacuum passage in main body casting provides a more positive seal at this point, and prevents fuel from leaking into this passage on left turns and stalling the engine because of too rich a mixture. Carter WCFB 4 Barrel Adjust Float Mikes Carburetor 21.4K subscribers 5.5K views 4 years ago https://www.carburetor-parts.com is providing this video about adjusting the float level and. Place the choke housing toward the left and remove upper right main body to throttle body screw. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. Carter WCFB, 4 barrel metering rod adjustment instructions. Take the top off and put the pump in the well all the way to the bottom. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. Fuel enters the primary side of the carburetor through a strainer screen at the fuel inlet and is directed to the primary needle valve and seat. Hold air horn upside down with floats in place and gasket removed. Some models have a pump relief check in the bottom of the fuel bowl. This spring is a bit complicated so this video will be very helpful when you change your spring.Find this WCFB spring here: https://www.carburetor-parts.com/wcfb-66d400.htmlFind WCFB parts here:https://www.carburetor-parts.com/wcfb-partscontents:00:0000:42 removing fast idle cam assembly00:56 taking the assembly apart piece by piece01:07 removing the old spring01:22 installing spring02:15 which direction does the pieces go?02:38 assembling the pieces03:16 installing the cam assembly onto the carburetor Put some fluid in theaccelerator pumpwell and press down on the pump. No metering rod gauges are necessary. What Has Been Done to This Carburetor?1. Tyler's Forgotten Car Rescue 22,933 views. BBS) and were basically an on/off condition similar to the function of a power valve. Probably not since only one butterfly is open. Can't find the answer you're looking for? Check any vents to make sure they are open. Adjust by bending the choke connector rod at lower angle (H). Make sure the air cleaner gasket does not block the bowl vents. Hold in place and carefully tighten metering rod arm set screw (G). Carter WCFB Rebuild Kit Selection Carter WCFB Build Sheets Carter WCFB Adjustments Carter WCFB 4 Barrel Carburetor Float System Carter WCFB Accelerator Pump BY CARB TYPE GENERAL TROUBLESHOOTING FAQs INJECTORS PURCHASE PARTS MANUALS BLOG When closing the throttle, the accelerator moves up in the pump well. You may even have to resort to finding a used WCFB carburetor. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. cm448. New fuel pumps are especially suspect. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . 1: Carter WCFB idle mixture and speed adustment screw location. The main body is partitioned into two compartments (primary and secondary), each containing a double pontoon float and lever assembly and a needle valve and seat. Carter WCFB Metering Rods 4,292 views Jul 15, 2018 28 Dislike Share Save Mikes Carburetor 18.7K subscribers https://www.carburetor-part.com is providing this video about the Carter WCFB 4. Adjust by bending unloader lip on throttle shaft lever. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Blowing out passages will not get them clean enough. Two ports act as calibrated air bleeds. Gasket removed as shown A. With bowl cover assembly inverted and float resting on pin in seated needle, and with gasket removed, the distance from the bowl cover to the top of float should be 7/64. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. This box did not have a part number. The accelerator pump circuit resides on the primary side of. Check your auto manual for the spec, but somewhere around 4-5 lbs would be good.Be sure the power piston is not frozen in one position. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Adjust by bending the connector rod at the lower bend (E). However, it is very similar and I found it very useful. 2: Carter AFB idle mixture and speed adjustment screws. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Both Carter and Rochester engineers determined that, on some applications, the float level in the primary side of the carburetor should be different than in the secondary side of the carburetor. Each float on the float assembly should be at the same height and centered so that they dont rub the side of the float bowl. Any pressure put on the needle will damage it. Carter used metering rods with a single step, 2-step, 3-step, and 4-step.