Any pressure put on the needle will damage it. There should be a retainer keeping the check ball in place. Share. Adjust by bending the choke connector rod at lower angle (H). Gasket between bowl and base is installed backwards (easy to do). I rebuilt a Carter WCFB carburetor with the lower auto choke setup. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. 1955 Pontiac - Loading or Carburetor Flooding Free shipping for many products! 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. Please complete the fields below to send your friend a link to this product. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. The adjustment of the pump is important in order to get the required fuel. Gasket removed. Good quality print. As for the pump not squirting.I suspect the pump well isnt filling up. No metering rod gauges are necessary. 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. Air Bled has the venturi tube pointing down into the bore. See figure 9F-2. The file is in PDF format, you can download and save/print a copy. Can't find the answer you're looking for? Check the low speed jets to make sure they are clear (#44). At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. New fuel pumps are especially suspect. Your friend will receive an email from you with a link to our site. Can't find the answer you're looking for? Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. Watch on. I have repeated multiple times with same results. 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. Outside top of early Carter tool box with correct decal. Install the pump connector rod (D) in the outer hole, long stroke. 1: Carter WCFB idle mixture and speed adustment screw location. Must be made after fast idle adjustment. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. Notice holes from which linkage rods are removed so they can Make sure the air cleaner gasket does not block the bowl vents. 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 . I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Clogged idle tube, or passages in the idle circuit. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Gasket removed as shown A. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . 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 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. Refer to the Adjustment Data Table for adjustment dimensions. On 1956 models one point rich. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. It needs about 4 lbs of pressure. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. parts. Can you help me out? Someone has installed it improperly. Hold throttle valve wide open and close choke valve as far as possible without forcing. Fig. 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. Can't find the answer you're looking for? 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. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. Measure from center top surface of pontoons to air horn. Press down on vacuum piston link C until metering rods bottom in the carburetor body. 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. 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. They are not meant to fill the hole, only to restrict it. This restricts the flow of fuel. When that is the case, I bend the accel. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. 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 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. 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. Back out throttle stop screw until throttle valves seat in bores. 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 You cannot go wrong with Mikes carburetor in any way. Make sure manifold heat control valve is free. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn All late model WCFB carburetors have three different length bowl cover screws. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. Back off the idle screw so that the throttle plates close completely. 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. Adjust by bending the connector rod at the lower bend (E). The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. Do not depress float lip against spring in needle, but let float rest of its own weight. 3: Holley 4150 idle mixture and speed adjustment screws. Also make sure one isnt rubbing on the side. Carter WCFB, 4 barrel metering rod adjustment instructions. To correct, remove carburetor and turn it upside down. This is an electronic rebuild manual, no physical copy will be provided. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. If not then clean it and try again. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. A WGD usually has a pump arm like that of a WCFB (IIRC). You should feel some pressure and fluid should not be bypassing the check needle. . This check prevents excessive pressure in the discharge passage during acceleration. Check throttle linkage to make sure that primary throttle valves come to full wide open position. 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 Add a couple drops of oil to the leather. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. 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. Seat the discharge check by tapping lightly in the hole to form a good seal. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Tyler's Forgotten Car Rescue 22,933 views. 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. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). With carburetor installed and engine warmed up. When closing the throttle, the accelerator moves up in the pump well. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. During high speed operation a vacuum exists at the pump jets. Fig. Rotate throttle stop screw E until engine idle at approx 500 RPM. 1955 Chevy Hard starting after flooding. 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 Pulloffs : CUFWCFB2 $ 0 . Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. One is in the secondary venturi and the other just above the throttle plate. Seat the intake check by tapping lightly in the hole to form a good seal. 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. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. The piston is brass and can be damaged very easily. The accelerator pump circuit resides on the primary side of this carburetor. The ends of the connector rod should point to the throttle arm side. What more could you ask for? Recheck unloader settings with carburetor on the engine. Probably around 4- 4.5lbs. 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 . The vacuum piston is no longer produced and can only be found as a NOS piece, or used. Carter WCFB, 4 barrel carburetor manual. Rochester and Carter replacement parts are interchangeable. Test the fuel pump to be sure it isnt putting out too much pressure. Correct by removing any burrs or nicks. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). The download link can be found on your order confirmation email which you will receive as soon as you complete the order. Loosen the clamp screw A Press. This box did not have a part number. (note) The metering rods will fit into the jets loosely. cm448. These diagrams include: Fig. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. a. You can also check the adjustment by measuring (F) which should be 18/64. They know their stuff and provide technical assistance and guides in both paper and video formats. but if it runs well you don't really need to make any adjustments. Adjust by bending unloader lip on throttle shaft lever. Piston force is too much for linkage. Carter WCFB Rebuild kits: Rebuild Kits. Make sure the pump relief check is clean. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. Hold air horn upside down with floats in place and gasket removed. Watch this. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . We will contact you as soon as this product is available. Measure float height as illustrated above. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Blow through the intake check passage to be sure the passage is open. They work fine when I push hard down on the piston. This restricts the flow of fuel. 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 The correct way is to use a fuel pump pressure gauge. WCFB carburetors, althqugh basically all units are allke. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Coat threads of screw with sealing compound and install it. Ultra-Sonic Cleaning3. You are flooding (getting too much gas in the float bowl), caused by these types of problems. You need to run wire down all small passages. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. The flat surface of the pump arm should be parallel to the straight edge. 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 Carter WCFB 4 Barrel Carburetor Float System. Some have a coating to give it a better shelf life. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. Two ports act as calibrated air bleeds. Sometimes scraping around the edges with an awl will remove the staking. If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. Each size must be used in its own location. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. It's highlighted yellow and will look something like this. DO NOT apply any pressure on the needle. Both valves should be closed. *New Airhorn Gasket7. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. Carter WCFB 4 Barrel Adjust Float. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. The flat on top of the pump arm should be parallel to the straight edge. Adjust by bending lip of float, not float arm. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. 60 pages of great info. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. *New Accelerator Pump5. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. 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. 1956 Plymouth, Powerflite Transmission - Dashpot The dashpot has been eliminated. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. It should not be opened up. The mixture screw may be bent, or damaged. 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. They are staked in the hole. Fast, secure e-book download. Disassembly2. Test the needle by holding it down gently with a brass drift punch. 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 metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. Find many great new & used options and get the best deals for 19571958 Plymouth Fury Carter WCFB Carburetor *Remanufactured at the best online prices at eBay! Put a straight edge across the dust cover as illustrated. The setups data is the same. Carter WCFB 4 Barrel Carburetor Float System. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. Adjust by bending arm (J) on choke trip lever. This can be done by looking at the impression on bowl cover gasket. 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. When done you should see very little daylight around the valve. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. Aspringis inserted in the power piston hole, then the piston. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. Some models have a pump relief check in the bottom of the fuel bowl. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. Adjust by bending lip of float, not float arm. If a loss of rpm is noted, or if the engine dies, and air leak exists. The Carter AFB uses weights, and therefore never goes out of adjustment. 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. Ideas?? With throttle valves seated in bores, dust cover and gasket in place. Be sure these ports are clear. Be careful removing the intake check retainer. Carter WCFB Build Sheets Other than that, great company to deal with. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. All These Part Numbers Interchange Into Our Part No. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! Check any vents to make sure they are open. *New Float6. Can't find the answer you're looking for. Blowing out passages will not get them clean enough. Make sure the pontoons are centered and will not rub the bowl sides. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. They sometimes need trimming. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Place the choke housing toward the left and remove upper right main body to throttle body screw. 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 (. 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 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. 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. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. 2: Carter AFB idle mixture and speed adjustment screws. Take the top off and put the pump in the well all the way to the bottom. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. 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 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. 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). To correct, remove carburetor and turn it upside down. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? Technical Details. Make sure there is a check needle below the main discharge. 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. b. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. This is an electronic rebuild manual, no physical copy will be provided. The well should fill with fluid. Make sure the ball rattles. 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? Low fuel pump pressure always check you motors manual for the correct pressure. Test the floats in hot water and if you get any bubbles then they are leaking. If not, then find the check ball and make sure it is loose. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. 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. BBS) and were basically an on/off condition similar to the function of a power valve. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. 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. Everyone Has Started an Engine in the . Adjust by bending float arms, making sure both pontoons on each float are the same height. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. 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. This eliminates any bog or hesitation when acceleration. Product information . 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. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. The carburetor will flood. Most of the single step rods were steel. On the WCFB the check ball is usually at the bottom of the pump well. The metering rod adjustment should be done after the pump adjustment. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. 1st check to make sure the fast idle linkage isnt holding the valves open. 5:04. Make sure the air horn contacts the inner wall of the bowl. Ultra-Sonic Cleaning3. Solid fuel has the 2 tubes pointing up. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. When replacing them hold them tight against the wall while tightening the screw. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. The single step rods were used on some of the price leader carburetors (i.e. William C. Carter was born in Union City Tennessee in 1884. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. WCFB Carburetor Cutting Out on Left Hand Turn. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. Install the pump connector rod (D) in the outer hole, long stroke. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. 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). If hard starting still exists change the choke setting to one point lean. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. Then close throttle. However, it is very similar and I found it very useful. Did the old gasket get removed? Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. Examine the viton tip for any marks.Fuel pump pressure could be too high. FREE to our customers that buy a rebuild kit. Enter Carb Number. This allows air instead of fuel to be drawn off the pump jets. Adjust by bending throttle connector rod at upper angle (B). 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. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. Rotate throttle stop screw E until engine idle at approx 500 RPM. The ends of the connector rod should point to the throttle arm side. The accelerator pump circuit resides on the primary side of. 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. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. Anti-Rust "Dichromate" Finish**4. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. When removing valves they should be marked so that they get put back the same way. Could the float bowl actually be the problem? It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. 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. 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. Note te larger box, and the number of additional tools from the 1935 set. The WCFB carburetor which came on some of the earliest 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.