Back off the idle screw so that the throttle plates close completely. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. Solid fuel has the 2 tubes pointing up. Blow through the intake check passage to be sure the passage is open. They work fine when I push hard down on the piston. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. 60 pages of great info. Carburetors equipped with an adjustable bowl vent require adjustment. Everyone Has Started an Engine in the . Rotate throttle stop screw E until engine idle at approx 500 RPM. Hold a straight edge across top of dust cover housing, next to the pump arm. Make sure the air cleaner gasket does not block the bowl vents. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. In this video I show you how to replace the fast idle spring on the WCFB carburetor. *New Float6. There should be a retainer keeping the check ball in place. Good quality print. Carter WCFB, 4 barrel carburetor manual. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. 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). Use a brass drift punch. WCFB Carburetor Cutting Out on Left Hand Turn. See figure 9F-2. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. The flat surface of the pump arm should be parallel to the straight edge. Take the top off and put the pump in the well all the way to the bottom. Coat threads of screw with sealing compound and install it. Adjust by bending throttle connector rod at upper angle (B). Clogged idle tube, or passages in the idle circuit. As the engine gains in RPM, the vacuum drops and the metering rods are pulled out of the main jet allowing more fuel to flow. 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. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. They sometimes need trimming. Hold throttle valve wide open and close choke valve as far as possible without forcing. As for the pump not squirting.I suspect the pump well isnt filling up. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. On 1956 models one point rich. 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 Adjust by bending lip of float, not float arm. The ends of the connector rod should point to the throttle arm side. Fast, secure e-book download. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. 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. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . 1956 Plymouth, Powerflite Transmission - Dashpot The dashpot has been eliminated. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. Product information . Carter WCFB Fast Idle With carburetor installed and engine warmed up. This check prevents excessive pressure in the discharge passage during acceleration. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. Test the floats in hot water and if you get any bubbles then they are leaking. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. 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. 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. Can't find the answer you're looking for? If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Do not depress float lip against spring in needle, but let float rest of its own weight. Then close throttle. Pulloffs : CUFWCFB2 $ 0 . Make sure there is a check needle below the main discharge. Make sure manifold heat control valve is free. Can you help me out? Other than that, great company to deal with. The mixture screw may be bent, or damaged. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Install the pump connector rod (D) in the outer hole, long stroke. The accelerator pump circuit resides on the primary side of this carburetor. 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. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. You may even have to resort to finding a used WCFB carburetor. One of the butterflies is open about 1/8 with the carburetor dis assembled. Make sure the ball rattles. Do not depress float lip against spring in needle, but let float rest of its own weight. Make sure these are clear if you have percolation problems. Carter WCFB 4 Barrel Carburetor Float System. Metering rods for the WCFB have been out of production for several years now. Secondarys are somehow stuck open (which amounts to a vacuum leak). Also make sure one isnt rubbing on the side. You cannot go wrong with Mikes carburetor in any way. Test the needle by holding it down gently with a brass drift punch. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. Recheck float adjustments. 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 metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. What more could you ask for? The metering rod adjustment should be done after the pump adjustment. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. Carter WCFB 4 Barrel Carburetor Float System. No metering rod gauges are necessary. Two ports act as calibrated air bleeds. Gasket between bowl and base is installed backwards (easy to do). You need to run wire down all small passages. Examine the viton tip for any marks.Fuel pump pressure could be too high. Back out throttle screw so that the throttle valve close completly. Adjusting the WCFB float level & float drop: 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. 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. One is in the secondary venturi and the other just above the throttle plate. Notice holes from which linkage rods are removed so they can Place the choke housing toward the left and remove upper right main body to throttle body screw. Adjust by bending float arms, making sure both pontoons on each float are the same height. Any bubbles indicates a leak.Make sure the 2 floats are the same height. You can also check the adjustment by measuring (F) which should be 18/64. Coat threads of screw with sealing compound and install it. b. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . With carburetor installed and engine warmed up. When I slow down to an idle, my engine runs rough. Rotate throttle stop screw E until engine idle at approx 500 RPM. On the WCFB the check ball is usually at the bottom of the pump well. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. 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. They know their stuff and provide technical assistance and guides in both paper and video formats. Piston force is too much for linkage. Rochester and Carter replacement parts are interchangeable. Can't find the answer you're looking for? Check throttle linkage to make sure that primary throttle valves come to full wide open position. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. Can't find the answer you're looking for? The fuel is also conducted through a passage in the air horn to the secondary needle seat. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Change the choke setting to index. When removing valves they should be marked so that they get put back the same way. Carter 2 Barrel BBD Adjustments Mikes Carburetor 21.5K subscribers Subscribe 7.9K views 1 year ago In this video we are going to show you how to do the various adjustments on both the Air. 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. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. What Has Been Done to This Carburetor?1. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. Fig. The most complete document I have found. The correct way is to use a fuel pump pressure gauge. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. 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. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? The file is in PDF format, you can download and save/print a copy. Seat the intake check by tapping lightly in the hole to form a good seal. Most of the single step rods were steel. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. Outside top of early Carter tool box with correct decal. 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. Older kits 30-70s. 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 With throttle valves seated in bores, dust cover and gasket in place. This allows air instead of fuel to be drawn off the pump jets. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. Adjust by bending the choke connector rod at lower angle (H). When the piston is frozen you may have to drill a small hole in the bottom of the float bowl, just under the piston and hammer it out. Could the float bowl actually be the problem? Watch on. Loosen the clamp screw A Press. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. This is an electronic rebuild manual, no physical copy will be provided. Measure from center top surface of pontoons to air horn. Adjust by bending the connector rod at the lower bend (E). I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. Hold in place and carefully tighten metering rod arm set screw (G). Gasket removed as shown A. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Place the choke housing toward the left and remove upper right main body to throttle body screw. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. 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). One caveatits my impression that the float bowl is full because when I disconnect the fuel supply line from fuel pump (to card), it has pressure on the line. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. During high speed operation a vacuum exists at the pump jets. These diagrams include: Fig. Carter WCFB 4 Barrel Carburetor Float System. Put a straight edge across the dust cover as illustrated. To prevent fuel from being drawn through the pump circuit, the passage to the pump jets is vented by a cross passage to the carburetor bowl above the fuel level. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. 5:04. 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. 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. 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. Gasket removed. The WCFB carburetor which came on some of the earliest The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. Ultra-Sonic Cleaning3. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. 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. Adjust idle screws D to produce a smooth idle of correct speed is obtained. 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. 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. 1955 Chevy Hard starting after flooding. 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 (. You are flooding (getting too much gas in the float bowl), caused by these types of problems. This can be done by looking at the impression on bowl cover gasket. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). Probably around 4- 4.5lbs. Share. Carter WCFB Rebuild kits: Rebuild Kits. It needs about 4 lbs of pressure. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. 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. Enter Carb Number. The Solid fuel is the later models BBDContents:00:00 intro00:34 air bled adjustments00:37 air bled float setting01:03 air bled fast idle type I01:25 air bled fast idle type II01:42 air bled fast idle type III01:58 air bled unloader02:24 air bled choke vacuum kick03:01 air bled automatic choke03:16 air bled pump04:08 air bled dashpot04:27 air bled idle speed \u0026 mixture04:58 air bled emission carburetors idle mixture06:00 air bled limiter cap06:36 solid fuel adjustments06:40 solid fuel float setting07:03 solid fuel metering rod07:27 solid fuel accelerator pump07:55 solid fuel bowl vent08:18 solid fuel fast idle cam08:43 solid fuel choke pull-off09:12 solid fuel automatic choke09:24 solid fuel egr dump valve09:46 solid fuel unloader10:08 solid fuel high altitude10:28 solid fuel idle speed \u0026 mixture12:11 solid fuel Limiter cap12:37 solid fuel fst idle12:51 solid fuel throttle positioner13:56 solid fuel vacuum throttle positioner14:31 solid fuel sol-vac15:04 solid fuel dashpot15:28 solid fuel transducer 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. Run a blunt object around the inside of the leather cup to make sure any coating is broken. William C. Carter was born in Union City Tennessee in 1884. 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. If hard starting still exists change the choke setting to one point lean. Test the fuel pump to be sure it isnt putting out too much pressure. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . *New Main Body Gasket8. 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. The piston is brass and can be damaged very easily. Correct by removing any burrs or nicks. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Back out throttle stop screw until throttle valves seat in bores. Adjust by bending unloader lip on throttle shaft lever. Carter WGD Adjustments Float Level 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. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! All These Part Numbers Interchange Into Our Part No. DO NOT apply any pressure on the needle. Can't find the answer you're looking for. It should not be opened up. 2: Carter AFB idle mixture and speed adjustment screws. They are not meant to fill the hole, only to restrict it. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. Press down on vacuum piston link C until metering rods bottom in the carburetor body. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. Install the pump connector rod (D) in the outer hole, long stroke. This restricts the flow of fuel. The adjustment of the pump is important in order to get the required fuel. 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. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine.