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 The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. The accelerator pump circuit resides on the primary side of. A WGD usually has a pump arm like that of a WCFB (IIRC). 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 Make sure manifold heat control valve is free. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. See figure 9F-2. Make sure there is a check needle below the main discharge. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. All late model WCFB carburetors have three different length bowl cover screws. parts. William C. Carter was born in Union City Tennessee in 1884. Refer to the Adjustment Data Table for adjustment dimensions. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. 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. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Aspringis inserted in the power piston hole, then the piston. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. 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 . They work fine when I push hard down on the piston. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Ethanol leaves deposits behind that acts like corrosion. Can't find the answer you're looking for? He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. They are not meant to fill the hole, only to restrict it. The WCFB carburetor which came on some of the earliest Most of the single step rods were steel. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). Then close throttle. This is percolation. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Note te larger box, and the number of additional tools from the 1935 set. Adjust by bending the connector rod at the lower bend (E). 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. Adjust by bending throttle connector rod at deepest angle as shown. 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. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. Metering rods for the WCFB have been out of production for several years now. 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. Piston force is too much for linkage. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. 1955 Pontiac - Loading or Carburetor Flooding Hold a straight edge across top of dust cover housing, next to the pump arm. 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. Seat the intake check by tapping lightly in the hole to form a good seal. 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. It should not be opened up. New fuel pumps are especially suspect. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. WCFB carburetors, althqugh basically all units are allke. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. Rochester and Carter replacement parts are interchangeable. Do not depress float lip against spring in needle, but let float rest of its own weight. Take the top off and put the pump in the well all the way to the bottom. Use a brass drift punch. 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. 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. Disassembly2. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. cm448. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. The download link will expire in 30 days. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Secondarys are somehow stuck open (which amounts to a vacuum leak). Gasket between bowl and base is installed backwards (easy to do). To correct, remove carburetor and turn it upside down. Other than that, great company to deal with. However, it is very similar and I found it very useful. Make sure the pontoons are centered and will not rub the bowl sides. *New Float6. This restricts the flow of fuel. Can you help me out? Back out throttle lever set screw until throttle valves seat in bores of carburetor. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. 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 file is in PDF format, you can download and save/print a copy. Anti-Rust "Dichromate" Finish**4. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. The discharge check is seated at this time to prevent air being drawn into the pump well. Can't find the answer you're looking for. Carter WCFB 4 Barrel Carburetor Float System. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. 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 throttle connector rod at upper angle (B). These diagrams include: Fig. If hard starting still exists change the choke setting to one point lean. Put some fluid in theaccelerator pumpwell and press down on the pump. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Ultra-Sonic Cleaning3. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Rotate throttle stop screw E until engine idle at approx 500 RPM. The piston is brass and can be damaged very easily. Gasket removed as shown A. 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. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. FREE to our customers that buy a rebuild kit. The adjustment of the pump is important in order to get the required fuel. You can also check the adjustment by measuring (F) which should be 18/64. Adjust idle screws D to produce a smooth idle of correct speed is obtained. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Check any vents to make sure they are open. On the WCFB the check ball is usually at the bottom of the pump well. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Back out throttle screw so that the throttle valve close completly. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Hold in place and carefully tighten metering rod arm set screw (G). The adjustment of the pump is important in order to get the required fuel. Hold air horn upright with floats hanging. 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. The correct way is to use a fuel pump pressure gauge. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. The most complete document I have found. 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. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. This box did not have a part number. They sometimes need trimming. Can't find the answer you're looking for? a. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. 57-65 WCFB 1 x 4 carb - Cover only no spring or spring plate CUD3741 $ 4.99 Gasket - Base WCFB 4GC G402 $ 4.95 Flange Gasket G1164 $ 4.95 WCFB Air Cleaner Gasket . With throttle valves seated in bores, dust cover and gasket in place. 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. Fig. 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. Test the needle by holding it down gently with a brass drift punch. Some have a coating to give it a better shelf life. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Blow through the intake check passage to be sure the passage is open. Install the pump connector rod (D) in the outer hole, long stroke. Recheck unloader settings with carburetor on the engine. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. During high speed operation a vacuum exists at the pump jets. Carter WCFB 4 Barrel Carburetor Float System. What more could you ask for? 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. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). Make sure these are clear if you have percolation problems. Carter WCFB, 4 barrel metering rod adjustment instructions. Carter WCFB 4 Barrel Adjust Float. 1: Carter WCFB idle mixture and speed adustment screw location. The ends of the connector rod should point to the throttle arm side. Make sure the pump relief check is clean. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. Press down on vacuum piston link C until metering rods bottom in the carburetor body. Your friend will receive an email from you with a link to our site. Someone has installed it improperly. 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. You may even have to resort to finding a used WCFB carburetor. 1st check to make sure the fast idle linkage isnt holding the valves open. 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. 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. Watch on. It's highlighted yellow and will look something like this. Air Bled has the venturi tube pointing down into the bore. *New Airhorn Gasket7. 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. 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. Check the low speed jets to make sure they are clear (#44). Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. The setups data is the same. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. b. Technical Details. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . This restricts the flow of fuel. As for the pump not squirting.I suspect the pump well isnt filling up. 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. To correct, remove carburetor and turn it upside down. Place the choke housing toward the left and remove upper right main body to throttle body screw. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. What Has Been Done to This Carburetor?1. You need to run wire down all small passages. Install the pump connector rod (D) in the outer hole, long stroke. There should be a retainer keeping the check ball in place. Change the choke setting to index. When that is the case, I bend the accel. Coat threads of screw with sealing compound and install it. . 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. Each size must be used in its own location. 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. If not then clean it and try again. Could the float bowl actually be the problem? 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. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. The flat surface of the pump arm should be parallel to the straight edge. Tyler's Forgotten Car Rescue 22,933 views. 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. 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. When replacing them hold them tight against the wall while tightening the screw. 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). 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. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. Carter WCFB 4 Barrel Carburetor Float System. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. 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. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. Adjust by bending arm (J) on choke trip lever. Add a couple drops of oil to the leather. Can't find the answer you're looking for? The metering rod adjustment should be done after the pump adjustment. Outside top of early Carter tool box with correct decal. 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 but if it runs well you don't really need to make any adjustments. 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. Can't find the answer you're looking for? When done you should see very little daylight around the valve. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. 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. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. 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). 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. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Measure from toe B to air horn. Be sure these ports are clear. Coat threads of screw with sealing compound and install it. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever.
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