You need to run wire down all small passages. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. Contact Us Home Blog FAQ's Technical Help My Account LoginRegister Examples of Carb Numbers search 0$0 Carburetor Parts by Make & Model Scroll to see more Aero Coach Carburetor Parts Alfa Romeo American Bantam American General American LaFrance American Motors Nash Rambler Auburn Audi Carter WCFB 4 Barrel Accelerator Pump Circuit Carter BB Carburetor Assembly Part 1 of 2 Rochester Quadrajet Idle Tube Removal Tunning Rochestor Quadrajet 4 barrel Carburetor Mark Osborne. Carter WCFB, 4 barrel metering rod adjustment instructions. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. 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. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Carter WCFB, 4 barrel carburetor manual. If hard starting still exists change the choke setting to one point lean. Rotate throttle stop screw E until engine idle at approx 500 RPM. Can you help me out? Tyler's Forgotten Car Rescue 22,933 views. You are flooding (getting too much gas in the float bowl), caused by these types of problems. Back off the idle screw so that the throttle plates close completely. Solid fuel has the 2 tubes pointing up. This is an electronic rebuild manual, no physical copy will be provided. *New Airhorn Gasket7. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. Adjust by bending the connector rod at the lower bend (E). 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. Probably around 4- 4.5lbs. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. Adjust by bending lip of float, not float arm. 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. Share. 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. These diagrams include: Fig. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Fast, secure e-book download. Can't find the answer you're looking for? When that is the case, I bend the accel. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. Everyone Has Started an Engine in the . 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. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. 3: Holley 4150 idle mixture and speed adjustment screws. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Install the pump connector rod (D) in the outer hole, long stroke. Put some fluid in theaccelerator pumpwell and press down on the pump. What Has Been Done to This Carburetor?1. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. Anti-Rust "Dichromate" Finish**4. Carburetors equipped with an adjustable bowl vent require adjustment. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. Adjust by bending float arms, making sure both pontoons on each float are the same height. Note te larger box, and the number of additional tools from the 1935 set. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. Adjust by bending the choke connector rod at lower angle (H). A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. The setups data is the same. 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. To correct, remove carburetor and turn it upside down. They are staked in the hole. Product information . 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. The ends of the connector rod should point to the throttle arm side. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. Low fuel pump pressure always check you motors manual for the correct pressure. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. It's highlighted yellow and will look something like this. Aspringis inserted in the power piston hole, then the piston. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. You may even have to resort to finding a used WCFB carburetor. 1955 Chevy Hard starting after flooding. Make sure these are clear if you have percolation problems. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . 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. 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. 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. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. You cannot go wrong with Mikes carburetor in any way. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. Free shipping for many products! The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. 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 WGD usually has a pump arm like that of a WCFB (IIRC). Could the float bowl actually be the problem? 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. 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 There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. As for the pump not squirting.I suspect the pump well isnt filling up. FREE to our customers that buy a rebuild kit. . Adjust by bending throttle connector rod at deepest angle as shown. Back out throttle lever set screw until throttle valves seat in bores of carburetor. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Adjust by bending unloader lip on throttle shaft lever. Adjust by bending throttle connector rod at upper angle (B). Please complete the fields below to send your friend a link to this product. 1955 Pontiac - Loading or Carburetor Flooding Check the low speed jets to make sure they are clear (#44). When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. Also make sure one isnt rubbing on the side. William C. Carter was born in Union City Tennessee in 1884. Ideas?? If not, then find the check ball and make sure it is loose. Disassembly2. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. Hold in place and carefully tighten metering rod arm set screw (G). Each size must be used in its own location. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. Rotate throttle stop screw E until engine idle at approx 500 RPM. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. Pulloffs : CUFWCFB2 $ 0 . Carter WCFB Build Sheets The metering rod adjustment should be done after the pump adjustment. Carter WCFB 4 Barrel Carburetor Float System. It should not be opened up. Coat threads of screw with sealing compound and install it. 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 correct way is to use a fuel pump pressure gauge. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. Hold air horn upside down with floats in place and gasket removed. When replacing them hold them tight against the wall while tightening the screw. Ethanol leaves deposits behind that acts like corrosion. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. Ultra-Sonic Cleaning3. Ultra-Sonic Cleaning3. Carter WCFB Rebuild kits: Rebuild Kits. 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. 1: Carter WCFB idle mixture and speed adustment screw location. The mixture screw may be bent, or damaged. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Notice holes from which linkage rods are removed so they can You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Is there a pointed check weight in the main discharge hole. cm448. Then close throttle. Use a brass drift punch. On 1956 models one point rich. To correct, remove carburetor and turn it upside down. Disassembly2. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. All late model WCFB carburetors have three different length bowl cover screws. I. DISASSEMBLY. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. When done you should see very little daylight around the valve. Refer to the Adjustment Data Table for adjustment dimensions. Someone has installed it improperly. You can also check the adjustment by measuring (F) which should be 18/64. 5:04. With carburetor installed and engine warmed up. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. Rochester and Carter replacement parts are interchangeable. When closing the throttle, the accelerator moves up in the pump well. Some have a coating to give it a better shelf life. Be sure these ports are clear. Press down on vacuum piston link C until metering rods bottom in the carburetor body. 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. Blow through the intake check passage to be sure the passage is open. 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. The file is in PDF format, you can download and save/print a copy. This eliminates any bog or hesitation when acceleration. No metering rod gauges are necessary. 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. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. The fuel is also conducted through a passage in the air horn to the secondary needle seat. 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. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Place the choke housing toward the left and remove upper right main body to throttle body screw. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. They work fine when I push hard down on the piston. Adjust by bending lip of float, not float arm. 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 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. Older kits 30-70s. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. The well should fill with fluid. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. Ethanol gas does not have much if any lubrication. Do not depress float lip against spring in needle, but let float rest of its own weight. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Gasket removed as shown A. The manual says to back out the throttle stop screw and hold the fast idle cam in the "choke open" position, then screw in the throttle stop screw until it just contacts the throttle lever arm, then give it another full turn. Loosen the clamp screw A Press. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. 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 (. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). 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. The single step rods were used on some of the price leader carburetors (i.e. 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. Recheck float adjustments. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . This restricts the flow of fuel. All These Part Numbers Interchange Into Our Part No. 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. Place universal pump travel gauge T109-117S (if you happen to have one as they are not available) inverted on edge of dust cover boss of bowl cover. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. This box did not have a part number. Examine the viton tip for any marks.Fuel pump pressure could be too high. On the WCFB the check ball is usually at the bottom of the pump well. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. The carburetor will flood. Gasket removed. 1956 Plymouth, Powerflite Transmission - Dashpot The dashpot has been eliminated. In this video I show you how to replace the fast idle spring on the WCFB carburetor. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! The vacuum piston is no longer produced and can only be found as a NOS piece, or used. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. Fig. 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. Carter WCFB 4 Barrel Carburetor Float System. 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. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Make sure the pontoons are centered and will not rub the bowl sides. When removing valves they should be marked so that they get put back the same way. Carter WCFB 4 Barrel Carburetor Float System. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. Recheck unloader settings with carburetor on the engine. The adjustment of the pump is important in order to get the required fuel. The ends of the connector rod should point to the throttle arm side. 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. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. 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. The most complete document I have found. Test the needle by holding it down gently with a brass drift punch. Adjust idle screws D to produce a smooth idle of correct speed is obtained. It needs about 4 lbs of pressure. 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. Be careful removing the intake check retainer. With mineral spirits in the float bowl, Raise the pump. Place the choke housing toward the left and remove upper right main body to throttle body screw. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. Can't find the answer you're looking for? Back out throttle stop screw until throttle valves seat in bores. Enter Carb Number. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? Carter WCFB 4 Barrel Carburetor Float System. Make sure the air horn contacts the inner wall of the bowl. Any bubbles indicates a leak.Make sure the 2 floats are the same height. They sometimes need trimming. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. If a loss of rpm is noted, or if the engine dies, and air leak exists. Correct by removing any burrs or nicks. Air Bled has the venturi tube pointing down into the bore. Gasket between bowl and base is installed backwards (easy to do). Seat the discharge check by tapping lightly in the hole to form a good seal. Make sure the pump relief check is clean. See figure 9F-2.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). New fuel pumps are especially suspect. The flat on top of the pump arm should be parallel to the straight edge. Clogged idle tube, or passages in the idle circuit. Measure from toe B to air horn. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). Test the floats in hot water and if you get any bubbles then they are leaking. 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. Two ports act as calibrated air bleeds. The accelerator pump circuit resides on the primary side of this carburetor. Measure from center top surface of pontoons to air horn. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. WCFB carburetors, althqugh basically all units are allke. Secondarys are somehow stuck open (which amounts to a vacuum leak). Blow air through the main discharge to make sure the passage is clear all the way to the pump well. If not then clean it and try again. Hold a straight edge across top of dust cover housing, next to the pump arm. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. Measure float height as illustrated above. Put a straight edge across the dust cover as illustrated. We will contact you as soon as this product is available. Test the fuel pump to be sure it isnt putting out too much pressure. Both valves should be closed. This can be done by looking at the impression on bowl cover gasket. Do not depress float lip against spring in needle, but let float rest of its own weight. Other than that, great company to deal with. The download link will expire in 30 days. The accelerator pump circuit resides on the primary side of. This is an electronic rebuild manual, no physical copy will be provided. 1st check to make sure the fast idle linkage isnt holding the valves open. *New Accelerator Pump5. During high speed operation a vacuum exists at the pump jets. One of the butterflies is open about 1/8 with the carburetor dis assembled. BBS) and were basically an on/off condition similar to the function of a power valve. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). 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. 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. 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 Probably not since only one butterfly is open. The distance from the dust cover boss to the top of the plunger shaft should be 1/2 inch (distance from base to tip of finger on gauge) (C). One is in the secondary venturi and the other just above the throttle plate. Any pressure put on the needle will damage it. Your friend will receive an email from you with a link to our site. 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. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. (note) The metering rods will fit into the jets loosely. 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. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. 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. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. Make sure the air cleaner gasket does not block the bowl vents. They are not meant to fill the hole, only to restrict it. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Technical Details. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. This allows air instead of fuel to be drawn off the pump jets. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available.

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