carter wcfb carburetor adjustment carter wcfb carburetor adjustment

Solid fuel has the 2 tubes pointing up. Can't find the answer you're looking for. Back out throttle screw so that the throttle valve close completly. With carburetor installed and engine warmed up. Carter WCFB 4 Barrel Carburetor Float System. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. 60 pages of great info. Adjust by bending unloader lip on throttle shaft lever. Can't find the answer you're looking for? Seat the discharge check by tapping lightly in the hole to form a good seal. The single step rods were used on some of the price leader carburetors (i.e. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. Do not depress float lip against spring in needle, but let float rest of its own weight. The fuel is also conducted through a passage in the air horn to the secondary needle seat. 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. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. You may even have to resort to finding a used WCFB carburetor. Adjusting the WCFB float level and float drop. Clogged idle tube, or passages in the idle circuit. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. The Carter AFB uses weights, and therefore never goes out of adjustment. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). 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 Seat the intake check by tapping lightly in the hole to form a good seal. Float drop not set, or fuel pump pressure too low. WCFB Carburetor Cutting Out on Left Hand Turn. FREE to our customers that buy a rebuild kit. Did the old gasket get removed? 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. Ideas?? As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. The file is in PDF format, you can download and save/print a copy. If not then clean it and try again. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. You cannot go wrong with Mikes carburetor in any way. This box did not have a part number. 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 They are not meant to fill the hole, only to restrict it. Both valves should be closed. Carter WCFB 4 Barrel Carburetor Float System. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. 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. When I slow down to an idle, my engine runs rough. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. All These Part Numbers Interchange Into Our Part No. 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. Adjust by bending throttle connector rod at deepest angle as shown. The accelerator pump circuit resides on the primary side of. 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.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 adjustment of the pump is important in order to get the required fuel. Use a brass drift punch. Make sure the pump relief check is clean. Examine the viton tip for any marks.Fuel pump pressure could be too high. The well should fill with fluid. 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. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. Probably not since only one butterfly is open. Then close throttle. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. Everyone Has Started an Engine in the . When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. See figure 9F-2. Check the low speed jets to make sure they are clear (#44). Put some fluid in theaccelerator pumpwell and press down on the pump. 1: Carter WCFB idle mixture and speed adustment screw location. Carburetors equipped with an adjustable bowl vent require adjustment. Recheck unloader settings with carburetor on the engine. You need to run wire down all small passages. Sometimes scraping around the edges with an awl will remove the staking. Most of the single step rods were steel. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. 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. (note) The metering rods will fit into the jets loosely. 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. Make sure the pontoons are centered and will not rub the bowl sides. 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. Watch this. You should feel some pressure and fluid should not be bypassing the check needle. 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 On the WCFB the check ball is usually at the bottom of the pump well. Coat threads of screw with sealing compound and install it. In this video I show you how to replace the fast idle spring on the WCFB carburetor. The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. 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. Adjust by bending lip of float, not float arm. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. 1955 Chevy Hard starting after flooding. It needs about 4 lbs of pressure. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. *New Main Body Gasket8. 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. 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. Carter WCFB, 4 barrel metering rod adjustment instructions. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Is there a pointed check weight in the main discharge hole. When that is the case, I bend the accel. DO NOT apply any pressure on the needle. Technical Details. 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. Each size must be used in its own location. parts. 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 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. The ends of the connector rod should point to the throttle arm side. Hold throttle valve wide open and close choke valve as far as possible without forcing. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. The piston is brass and can be damaged very easily. 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. Could the float bowl actually be the problem? Loosen the clamp screw A Press. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. Good quality print. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. The accelerator pump circuit resides on the primary side of this carburetor. You are flooding (getting too much gas in the float bowl), caused by these types of problems. Gasket removed as shown A. No metering rod gauges are necessary. However, it is very similar and I found it very useful. The most complete document I have found. What Has Been Done to This Carburetor?1. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. Adjusting the WCFB Metering Rods 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. It should not be opened up. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. To correct, remove carburetor and turn it upside down. When removing valves they should be marked so that they get put back the same way. Carter WCFB, 4 barrel carburetor manual. 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. Make sure these are clear if you have percolation problems. Low fuel pump pressure always check you motors manual for the correct pressure. 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. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. 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. 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. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. I. DISASSEMBLY. 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. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. 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. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? Fig. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. 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. Measure from toe B to air horn. Back off the idle screw so that the throttle plates close completely. 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 . The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. One is in the secondary venturi and the other just above the throttle plate. 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. 1955 Pontiac - Loading or Carburetor Flooding There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). Gasket removed. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. They work fine when I push hard down on the piston. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. This allows air instead of fuel to be drawn off the pump jets. 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). William C. Carter was born in Union City Tennessee in 1884. Any bubbles indicates a leak.Make sure the 2 floats are the same height. The WCFB carburetor which came on some of the earliest It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. It's highlighted yellow and will look something like this. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. 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 The setups data is the same. The download link will expire in 30 days. Hold air horn upright with floats hanging. Adjust by bending the connector rod at the lower bend (E). 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. 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 Can you help me out? Piston force is too much for linkage. Test the needle by holding it down gently with a brass drift punch. Older kits 30-70s. Adjust by bending throttle connector rod at upper angle (B). If not, then find the check ball and make sure it is loose. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. 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. When done you should see very little daylight around the valve. Run a blunt object around the inside of the leather cup to make sure any coating is broken. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. Ethanol leaves deposits behind that acts like corrosion. The ends of the connector rod should point to the throttle arm side. 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). The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. This can be done by looking at the impression on bowl cover gasket. 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. 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. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. Hold in place and carefully tighten metering rod arm set screw (G). Rochester and Carter replacement parts are interchangeable. With throttle valves seated in bores, dust cover and gasket in place. Blow through the intake check passage to be sure the passage is open. Enter Carb Number. Note te larger box, and the number of additional tools from the 1935 set. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. b. They know their stuff and provide technical assistance and guides in both paper and video formats. This is an electronic rebuild manual, no physical copy will be provided. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . Be careful removing the intake check retainer. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Back out throttle stop screw until throttle valves seat in bores. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. Place the choke housing toward the left and remove upper right main body to throttle body screw. 3: Holley 4150 idle mixture and speed adjustment screws. 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. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. Can't find the answer you're looking for? I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. a. With mineral spirits in the float bowl, Raise the pump. Carter WCFB Fast Idle With carburetor installed and engine warmed up. Be sure these ports are clear. Tyler's Forgotten Car Rescue 22,933 views. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. They are staked in the hole. BBS) and were basically an on/off condition similar to the function of a power valve. You can also check the adjustment by measuring (F) which should be 18/64. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Can't find the answer you're looking for? Adjust by bending lip of float, not float arm. Refer to the Adjustment Data Table for adjustment dimensions. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. This restricts the flow of fuel. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Disassembly2. Test the floats in hot water and if you get any bubbles then they are leaking. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. . WCFB carburetors, althqugh basically all units are allke. Gasket between bowl and base is installed backwards (easy to do). 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. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. They sometimes need trimming. When closing the throttle, the accelerator moves up in the pump well. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. 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 (. Pulloffs : CUFWCFB2 $ 0 . There should be a retainer keeping the check ball in place. 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. Make sure manifold heat control valve is free. Hold air horn upside down with floats in place and gasket removed. 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. During high speed operation a vacuum exists at the pump jets. Metering rods for the WCFB have been out of production for several years now. Ultra-Sonic Cleaning3. Change the choke setting to index. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Air Bled has the venturi tube pointing down into the bore. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Carter WCFB 4 Barrel Carburetor Float System. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. The carburetor will flood. 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). The flat on top of the pump arm should be parallel to the straight edge. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. This check prevents excessive pressure in the discharge passage during acceleration. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). *New Airhorn Gasket7. This is percolation. Secondarys are somehow stuck open (which amounts to a vacuum leak). Back out throttle lever set screw until throttle valves seat in bores of carburetor. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! Watch on. 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. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. One of the butterflies is open about 1/8 with the carburetor dis assembled. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. Do not depress float lip against spring in needle, but let float rest of its own weight. To correct, remove carburetor and turn it upside down. As for the pump not squirting.I suspect the pump well isnt filling up. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. Two ports act as calibrated air bleeds. 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. Disassembly2. Adjust by bending float arms, making sure both pontoons on each float are the same height. Ultra-Sonic Cleaning3. Free shipping for many products! *New Accelerator Pump5. Check any vents to make sure they are open. 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.