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 CARBURETOR SHOP / Troubleshooting The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. Both valves should be closed. New fuel pumps are especially suspect. Do not depress float lip against spring in needle, but let float rest of its own weight. Can you help me out? 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. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. 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 box did not have a part number. They are staked in the hole. 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. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. Measure from center top surface of pontoons to air horn. In this video I show you how to replace the fast idle spring on the WCFB carburetor. 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. Blowing out passages will not get them clean enough. When that is the case, I bend the accel. Is there a pointed check weight in the main discharge hole. 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. Can't find the answer you're looking for? Clogged idle tube, or passages in the idle circuit. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). The adjustment of the pump is important in order to get the required fuel. Carter WCFB Technical - Carburetor Parts Please complete the fields below to send your friend a link to this product. 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. Adjust by bending float arms, making sure both pontoons on each float are the same height. Check the low speed jets to make sure they are clear (#44). Everyone Has Started an Engine in the . With carburetor installed and engine warmed up. 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. Make sure the pump relief check is clean. 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). Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. Refer to the Adjustment Data Table for adjustment dimensions. Carter Metering Rod Technology - THE CARBURETOR SHOP 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. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. A WGD usually has a pump arm like that of a WCFB (IIRC). Adjust by bending arm (J) on choke trip lever. Must be made after fast idle adjustment. Back out throttle lever set screw until throttle valves seat in bores of carburetor. Hold throttle valve wide open and close choke valve as far as possible without forcing. It's highlighted yellow and will look something like this. 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. 1st check to make sure the fast idle linkage isnt holding the valves open. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). I rebuilt a Carter WCFB carburetor with the lower auto choke setup. Carter WCFB Metering Rods - carburetor-parts.com When done you should see very little daylight around the valve. 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. They need to be centered in the bowl.Fuel could be leaking around the needle & 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. Most of the single step rods were steel. Press down on vacuum piston link C until metering rods bottom in the carburetor body. Adjust by bending lip of float, not float arm. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. Servicing The Rochester Quadrajet Carburetor - MotorTrend DO NOT apply any pressure on the needle. *New Accelerator Pump5. 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. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Make sure the pontoons are centered and will not rub the bowl sides. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). If the secondary throttle plate is staying open, then check the primary shaft dog and spring. Measure from toe B to air horn. 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. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. b. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. 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. How To Replace the Carter WCFB 4 Barrel Fast Idle Spring? Air Bled has the venturi tube pointing down into the bore. Quick test to see if the accelerator pump is working. WCFB Carburetor Cutting Out on Left Hand Turn. Adjust by bending the connector rod at the lower bend (E). cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. Carter 2 Barrel BBD Adjustments - YouTube This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. The piston is brass and can be damaged very easily. Disassembly2. 19591961 Chevrolet Carter WCFB Carburetor How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. (note) The metering rods will fit into the jets loosely. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). Make sure there is a check needle below the main discharge. cm448. Disassembly2. During high speed operation a vacuum exists at the pump jets. 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. Could the float bowl actually be the problem? 1955 Chevy Hard starting after flooding. Watch on. Some models have a pump relief check in the bottom of the fuel bowl. Carter WCFB 4 Barrel Carburetor Anti-Rust "Dichromate" Finish**4. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. One of the butterflies is open about 1/8 with the carburetor dis assembled. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. When replacing them hold them tight against the wall while tightening the screw. The carburetor will flood. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. How Do You Look up Carter Carburetor ID Numbers Online? - Reference.com The cfm of the Carter WCFB four-barrel carburetor is approximately 400. Ultra-Sonic Cleaning3. Note te larger box, and the number of additional tools from the 1935 set. 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. Secondarys are somehow stuck open (which amounts to a vacuum leak). Float drop not set, or fuel pump pressure too low. You should feel some pressure and fluid should not be bypassing the check needle. 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). 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. Place the choke housing toward the left and remove upper right main body to throttle body screw. Gasket removed as shown A. 1956-1957 Chevrolet Carter WCFB Carburetor Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. FREE to our customers that buy a rebuild kit. 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 This is percolation. 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 (. Older kits 30-70s. 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. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . 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 Can't find the answer you're looking for? Can't find the answer you're looking for? When adjusting the screws doesn't change the RPM then it means there is a problem with either the air, or the amount of fuel. Someone has installed it improperly. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. The ends of the connector rod should point to the throttle arm side. Carter WCFB Parts Page - carburetion.com Carter WCFB Archives - Mikes Carburetor Parts You can also check the adjustment by measuring (F) which should be 18/64. Any bubbles indicates a leak.Make sure the 2 floats are the same height. The single step rods were used on some of the price leader carburetors (i.e. You are flooding (getting too much gas in the float bowl), caused by these types of problems. There should be a retainer keeping the check ball in place. THE CARBURETOR SHOP / WCFB and 4-GC floats a. When I slow down to an idle, my engine runs rough. Carter WCFB Adjustments - Mikes Carburetor Parts Correct by removing any burrs or nicks. parts. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. 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 I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. Blow through the intake check passage to be sure the passage is open. 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? Adjusting the WCFB float level and float drop. WCFB | Carter Carburetors, Parts & Rebuild Kits Adjust idle screws D to produce a smooth idle of correct speed is obtained. Aspringis inserted in the power piston hole, then the piston. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. The most complete document I have found. Hold a straight edge across top of dust cover housing, next to the pump arm. Check throttle linkage to make sure that primary throttle valves come to full wide open position. Carter WCFB Fast Idle With carburetor installed and engine warmed up. Carter WCFB Build Sheets 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. 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). Place the choke housing toward the left and remove upper right main body to throttle body screw. Add a couple drops of oil to the leather. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Loosen the clamp screw A Press. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Some have a coating to give it a better shelf life. Carter WCFB 4 Barrel Carburetor Float System. Carter Carburetor Manual Good quality print. The correct way is to use a fuel pump pressure gauge. It needs about 4 lbs of pressure. It should not be opened up. What more could you ask for? The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. They sometimes need trimming. Carter WGD Adjustments - Mikes Carburetor Parts Examine the viton tip for any marks.Fuel pump pressure could be too high. Adjust by bending lip of float, not float arm. Carter WCFB 4 Barrel Metering Rod - Mikes Carburetor Parts 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. How to Modify a Carter or Edelbrock Carburetor - Muscle Car DIY