Carter WCFB 4 Barrel Accelerator Pump Circuit 3,951 views Jul 13, 2018 33 Dislike Share Mikes Carburetor 20K subscribers https://www.carburetor-parts.com is providing this video about how the. Can fill the accelerator chamber with a syringe (through top open passages of forward barrels where choke butterfly is) and the jets will spray gas into forward chambers (and will idle and accelerate for about 15 seconds)but when that gas is depleted, the spraying stops. This restricts the flow of fuel. Pulloffs : CUFWCFB2 $ 0 . 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? 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. Gasket between bowl and base is installed backwards (easy to do). Eckler's Premier Quality Products 57132129 Chevy Carburetor Rebuild Kit Carter WCFB Replacement Kit Includes All Gaskets, Seals, Check Balls, Springs, Accelerator Pump & Needle Valve Read more CARTER 4 Barrel WCFB DUAL CARBURETOR KITS & FUEL FILTERS 1961-65 CHEVROLET 1955-56 DESOTO April 18, 2018 Carter Carburetors Rebuild Kits I have repeated multiple times with same results. 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. Other than that, great company to deal with. Can't find the answer you're looking for? William C. Carter was born in Union City Tennessee in 1884. If not then clean it and try again. One is in the secondary venturi and the other just above the throttle plate. DO NOT apply any pressure on the needle. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. I. DISASSEMBLY. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. 1955 Pontiac - Loading or Carburetor Flooding He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. . Older kits 30-70s. Recheck float adjustments. Quick test to see if the accelerator pump is working. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. Check any vents to make sure they are open. When done you should see very little daylight around the valve. Disassembly2. Back off the idle screw so that the throttle plates close completely. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. There may be a blockage in the accelerator pump circuit which would also make it hard to pump.What is the carburetor number so we can make sure you have the correct pump?Polish the pump well with crocus cloth. Is there a pointed check weight in the main discharge hole. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. 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 (. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Carter WCFB 4 Barrel Carburetor Float System. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. 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. To correct, remove carburetor and turn it upside down. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. This check prevents excessive pressure in the discharge passage during acceleration. Blowing out passages will not get them clean enough. When removing valves they should be marked so that they get put back the same way. cm448. The file is in PDF format, you can download and save/print a copy. 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. The discharge check is seated at this time to prevent air being drawn into the pump well. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. The piston is brass and can be damaged very easily. Carter WCFB Carburetor E-Manual Download eWCFB, The file is in PDF format, you can download and save/print a copy, FREE to our customers that buy a rebuild kit. Ultra-Sonic Cleaning3. 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. What more could you ask for? A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Adjust by bending the connector rod at the lower bend (E). There should be a retainer keeping the check ball in place. Measure from center top surface of pontoons to air horn. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Hold air horn upside down with floats in place and gasket removed. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. These diagrams include: Fig. intro Carter WCFB 4 Barrel Carburetor Rebuild Mikes Carburetor 21.5K subscribers Subscribe 51 Share 3.1K views 9 months ago Disassemble & assemble your Carter WCFB 4 barrel. Add a couple drops of oil to the leather. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. Most of the single step rods were steel. This restricts the flow of fuel. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Test the fuel pump to be sure it isnt putting out too much pressure. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. When that is the case, I bend the accel. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Carter WCFB Carburetor Catalog Free WCFB Carburetor Manuals These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. Make sure manifold heat control valve is free. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. All late model WCFB carburetors have three different length bowl cover screws. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. *New Main Body Gasket8. Must be made after fast idle adjustment. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. This is an electronic rebuild manual, no physical copy will be provided. Make sure the air horn contacts the inner wall of the bowl. Make sure there is a check needle below the main discharge. No metering rod gauges are necessary. Recheck unloader settings with carburetor on the engine. Secondarys are somehow stuck open (which amounts to a vacuum leak). This is an electronic rebuild manual, no physical copy will be provided. 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 Any pressure put on the needle will damage it. Place the choke housing toward the left and remove upper right main body to throttle body screw. 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. One of the butterflies is open about 1/8 with the carburetor dis assembled. *New Accelerator Pump5. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). You need to run wire down all small passages. Share. 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. Change the choke setting to index. The Carter AFB uses weights, and therefore never goes out of adjustment. In my repeated attempts to get the accelerator valve to pump, the car has run for several minutes combinedplenty of time to get the float bowl full. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Refer to the Adjustment Data Table for adjustment dimensions. Founded by William Carter in 1909, the Carter Carburetor Company produced units such as the AVS, AFB and 385-CFM WCFB for dozens of years. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads.A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Take the top off and put the pump in the well all the way to the bottom. They sometimes need trimming. On 1956 models one point rich. Ultra-Sonic Cleaning3. Adjusting the WCFB float level and float drop. A float lifter spring, which is connected to the lever arm of the primary float and to a bracket on the accelerator pump plunger, is incorporated to stabilize primary bowl fuel level and prevent float bounce upon sudden stops, or on rough roads (these springs are nowhere to be found). From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. They are staked in the hole. The fuel is also conducted through a passage in the air horn to the secondary needle seat. You cannot go wrong with Mikes carburetor in any way. Ethanol leaves deposits behind that acts like corrosion. The metering rod adjustment should be done after the pump adjustment. While holding the parts as indicated above, rotate the metering rod arm B until the finger on the arm at D contacts the lug on the vacuum piston link C. Primary & secondary float will probably have different measurements.