Quick test to see if the accelerator pump is working. Carter WCFB 4 Barrel Carburetor Float System. 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). There should be a retainer keeping the check ball in place. The flat on top of the pump arm should be parallel to the straight edge. 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. Any pressure put on the needle will damage it. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. Older kits 30-70s. Measure float height as illustrated above. Fast, secure e-book download. We will contact you as soon as this product is available. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. Use a brass drift punch. Hold air horn upside down with floats in place and gasket removed. Adjust by bending unloader lip on throttle shaft lever. Carter WCFB Carburetor Manual - Mike's Carburetor Parts I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. This eliminates any bog or hesitation when acceleration. Carter WCFB 4 Barrel Carburetor Float System Can't find the answer you're looking for? Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . 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. 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. 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 (. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. parts. 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. Make sure the pontoons are centered and will not rub the bowl sides. Carter WCFB Metering Rods - carburetor-parts.com Notice holes from which linkage rods are removed so they can 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. Probably not since only one butterfly is open. 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 . Any bubbles indicates a leak.Make sure the 2 floats are the same height. No metering rod gauges are necessary. WCFB 4 Barrel Carburetor Float Adjustment At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Solid fuel has the 2 tubes pointing up. Seat the discharge check by tapping lightly in the hole to form a good seal. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. 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. 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. Recheck float adjustments. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. Must be made after fast idle adjustment. Gasket removed as shown A. Ethanol gas does not have much if any lubrication. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. Do not depress float lip against spring in needle, but let float rest of its own weight. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. The single step rods were used on some of the price leader carburetors (i.e. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. Carter WCFB Metering Rods - YouTube You should feel some pressure and fluid should not be bypassing the check needle. 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. On 1956 models one point rich. This is an electronic rebuild manual, no physical copy will be provided. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. Back off the idle screw so that the throttle plates close completely. Low fuel pump pressure always check you motors manual for the correct pressure. 1: Carter WCFB idle mixture and speed adustment screw location. If not then clean it and try again. The file is in PDF format, you can download and save/print a copy. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. *New Accelerator Pump5. Carter WCFB Archives - Mikes Carburetor Parts Ultra-Sonic Cleaning3. All late model WCFB carburetors have three different length bowl cover screws. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . Adjust idle screws D to produce a smooth idle of correct speed is obtained. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. 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. 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). 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. 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. 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. What more could you ask for? Metering rods for the WCFB have been out of production for several years now. Adjust by bending the choke connector rod at lower angle (H). They work fine when I push hard down on the piston. Most of the single step rods were steel. Rotate throttle stop screw E until engine idle at approx 500 RPM. cm448 Carter WCFB Carburetor Manual - carbkitsource.com Carter WCFB 4 Barrel Carburetor Float System. Recheck unloader settings with carburetor on the engine. The Carter AFB uses weights, and therefore never goes out of adjustment. 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. Put a straight edge across the dust cover as illustrated. Carter Metering Rod Technology - THE CARBURETOR SHOP Clogged idle tube, or passages in the idle circuit. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Float drop not set, or fuel pump pressure too low. Loosen the clamp screw A Press. During high speed operation a vacuum exists at the pump jets. PDF Carter Carb Identification Chart - annualreport.psg.fr 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. building a wcfb 2x4 setup | Hot Rod Forum Gasket between bowl and base is installed backwards (easy to do). When that is the case, I bend the accel. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. Carter WCFB 4 Barrel Carburetor Float System. 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 Some have a coating to give it a better shelf life. The best-selling product Click now to browse 1957 LINCOLN ACCELERATOR PUMP CARTER WCFB FLUORELASTOMER CUP ETHANOL RESITANTIS we ship worldwide cch-rc.com, C $45.04 Free shipping for many products Find many great new & used options and get the best deals for 1957 LINCOLN ACCELERATOR PUMP CARTER WCFB FLUORELASTOMER CUP ETHANOL RESITANTIS at the . GM Corvette 1963-1982 Idle Speed and Mixture Repair Guide This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. Make sure the air cleaner gasket does not block the bowl vents. Good quality print. Could the float bowl actually be the problem? Make sure the pump relief check is clean. On the WCFB the check ball is usually at the bottom of the pump well. This is percolation. cm448. They sometimes need trimming. Disassembly2. 1952 Carter WCFBsetting idle - Discussion Forums See figure 9F-2. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. Rotate throttle stop screw E until engine idle at approx 500 RPM. Each size must be used in its own location. The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. Back out throttle lever set screw until throttle valves seat in bores of carburetor. 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. Install the pump connector rod (D) in the outer hole, long stroke. Back out throttle screw so that the throttle valve close completly. 19571958 Plymouth Fury Carter WCFB Carburetor *Remanufactured | eBay Carter WCFB Parts Page - carburetion.com THE CARBURETOR SHOP / WCFB and 4-GC floats Gasket removed. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. 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 . The well should fill with fluid. Carburetors equipped with an adjustable bowl vent require adjustment. Note te larger box, and the number of additional tools from the 1935 set. Carter WCFB Carburetor Troubleshooting THE CARBURETOR SHOP / Carter carburetor special tools Be careful removing the intake check retainer. Check any vents to make sure they are open. Master Technician Tool Set (early, circa 1935, for 1923~1935 Carter carburetors all makes - most tools then current) Carter Master Technician Tool Set about 1951. This allows air instead of fuel to be drawn off the pump jets. Check throttle linkage to make sure that primary throttle valves come to full wide open position. Servicing The Rochester Quadrajet Carburetor - MotorTrend There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. Adjust by bending lip of float, not float arm. Make sure the air horn contacts the inner wall of the bowl. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. 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 restricts the flow of fuel. The ends of the connector rod should point to the throttle arm side. To correct, remove carburetor and turn it upside down. Hold a straight edge across top of dust cover housing, next to the pump arm. Run a blunt object around the inside of the leather cup to make sure any coating is broken. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. 1957 Lincoln Accelerator Pump Carter Wcfb Fluorelastomer Cup Ethanol 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. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. 1955 Pontiac - Loading or Carburetor Flooding When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. When done you should see very little daylight around the valve. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. Can't find the answer you're looking for? 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. William C. Carter was born in Union City Tennessee in 1884. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. Product information . 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. 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. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. 1955 Chevy Hard starting after flooding. Carter WCFB Build Sheets I rebuilt a Carter WCFB carburetor with the lower auto choke setup. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. BBS) and were basically an on/off condition similar to the function of a power valve. The accelerator pump circuit resides on the primary side of. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! You need to run wire down all small passages. Back out throttle stop screw until throttle valves seat in bores. The piston is brass and can be damaged very easily. Rochester and Carter replacement parts are interchangeable. Carter WCFB Technical - Carburetor Parts 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. Carter WCFB Fast Idle With carburetor installed and engine warmed up. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. 1st check to make sure the fast idle linkage isnt holding the valves open. Do not depress float lip against spring in needle, but let float rest of its own weight. One of the butterflies is open about 1/8 with the carburetor dis assembled. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. Air Bled has the venturi tube pointing down into the bore. Ideas?? You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. When closing the throttle, the accelerator moves up in the pump well. With throttle valves seated in bores, dust cover and gasket in place. The discharge check is seated at this time to prevent air being drawn into the pump well. These diagrams include: Fig. One is in the secondary venturi and the other just above the throttle plate. They are not meant to fill the hole, only to restrict it. Carter WCFB 4 Barrel Accelerator Pump Circuit - YouTube WCFB carburetors, althqugh basically all units are allke. Measure from toe B to air horn. *New Main Body Gasket8. Adjust by bending throttle connector rod at deepest angle as shown. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. All These Part Numbers Interchange Into Our Part No. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. As for the pump not squirting.I suspect the pump well isnt filling up. Place the choke housing toward the left and remove upper right main body to throttle body screw. Carter Carburetor Manual 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. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. This check prevents excessive pressure in the discharge passage during acceleration. Carter WCFB 4 Barrel Carburetor Float System. 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). 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 fuel is also conducted through a passage in the air horn to the secondary needle seat. Watch on. 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. If not, then find the check ball and make sure it is loose. Hold in place and carefully tighten metering rod arm set screw (G). The carburetor will flood. Can't find the answer you're looking for? Two ports act as calibrated air bleeds. Fig. To correct, remove carburetor and turn it upside down. (note) The metering rods will fit into the jets loosely. Refer to the Adjustment Data Table for adjustment dimensions. 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. Coat threads of screw with sealing compound and install it. Carter WCFB 4 Barrel Adjust Float. Also make sure one isnt rubbing on the side. The flat surface of the pump arm should be parallel to the straight edge. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). This is an electronic rebuild manual, no physical copy will be provided. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. Sometimes scraping around the edges with an awl will remove the staking. How To Replace the Carter WCFB 4 Barrel Fast Idle Spring? 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. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. Ethanol leaves deposits behind that acts like corrosion. Piston force is too much for linkage. Examine the viton tip for any marks.Fuel pump pressure could be too high. Adjust by bending the connector rod at the lower bend (E). 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 From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. You are flooding (getting too much gas in the float bowl), caused by these types of problems. 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. 3: Holley 4150 idle mixture and speed adjustment screws. Tyler's Forgotten Car Rescue 22,933 views. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. 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. When replacing them hold them tight against the wall while tightening the screw. It's highlighted yellow and will look something like this. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. *New Float6. Coat threads of screw with sealing compound and install it. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. 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. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. The adjustment of the pump is important in order to get the required fuel. Adjust idle screws D to produce a smooth idle of correct speed is obtained. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. The mixture screw may be bent, or damaged. 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. 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.