Loosen the clamp screw A Press. Disassembly2. Measure float height as illustrated above. 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 it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. Take the top off and put the pump in the well all the way to the bottom. 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. 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. Good quality print. Carter WCFB, 4 barrel metering rod adjustment instructions. 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? Do not depress float lip against spring in needle, but let float rest of its own weight. 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. The Carter AFB uses weights, and therefore never goes out of adjustment. One of the butterflies is open about 1/8 with the carburetor dis assembled. They work fine when I push hard down on the piston. Adjust idle screws D to produce a smooth idle of correct speed is obtained. 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. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. Metering rods for the WCFB have been out of production for several years now. The metering rod adjustment should be done after the pump adjustment. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. 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. It needs about 4 lbs of pressure. It should not be opened up. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. 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. Some have a coating to give it a better shelf life. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. *New Main Body Gasket8. Probably not since only one butterfly is open. 1955 Chevy Hard starting after flooding. Anti-Rust "Dichromate" Finish**4. The ends of the connector rod should point to the throttle arm side. Test the floats in hot water and if you get any bubbles then they are leaking. Technical Details. Probably around 4- 4.5lbs. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. 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 file is in PDF format, you can download and save/print a copy. 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). A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. This box did not have a part number. As for the pump not squirting.I suspect the pump well isnt filling up. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. If not, then find the check ball and make sure it is loose. The adjustment of the pump is important in order to get the required fuel. The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. *New Float6. 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. 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. The download link will expire in 30 days. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. *New Accelerator Pump5. Watch this. On 1956 models one point rich. The fuel is also conducted through a passage in the air horn to the secondary needle seat. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. This allows air instead of fuel to be drawn off the pump jets. Correct by removing any burrs or nicks. Refer to the Adjustment Data Table for adjustment dimensions. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. With throttle valves seated in bores, dust cover and gasket in place. parts. Free shipping for many products! A WGD usually has a pump arm like that of a WCFB (IIRC). Carter WCFB Build Sheets This can be done by looking at the impression on bowl cover gasket. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. Back out throttle stop screw until throttle valves seat in bores. Back out throttle lever set screw until throttle valves seat in bores of carburetor. 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. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. Recheck float adjustments. When closing the throttle, the accelerator moves up in the pump well. Other than that, great company to deal with. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Low fuel pump pressure always check you motors manual for the correct pressure. The WCFB carburetor which came on some of the earliest Back off the idle screw so that the throttle plates close completely. Seat the discharge check by tapping lightly in the hole to form a good seal. New fuel pumps are especially suspect. 3: Holley 4150 idle mixture and speed adjustment screws. . Did the old gasket get removed? Carburetors equipped with an adjustable bowl vent require adjustment. All These Part Numbers Interchange Into Our Part No. 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! Ultra-Sonic Cleaning3. You need to run wire down all small passages. Seat the intake check by tapping lightly in the hole to form a good seal. If not then clean it and try again. Gasket between bowl and base is installed backwards (easy to do). The discharge check is seated at this time to prevent air being drawn into the pump well. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. Make sure manifold heat control valve is free. Quick test to see if the accelerator pump is working. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. Back out throttle screw so that the throttle valve close completly. If hard starting still exists change the choke setting to one point lean. Carter WCFB Rebuild kits: Rebuild Kits. Can't find the answer you're looking for? Older kits 30-70s. Be sure these ports are clear. but if it runs well you don't really need to make any adjustments. Make sure the air horn contacts the inner wall of the bowl. 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 . 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. Make sure the pontoons are centered and will not rub the bowl sides. 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 . In this video I show you how to replace the fast idle spring on the WCFB carburetor. Adjust by bending lip of float, not float arm. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. When I slow down to an idle, my engine runs rough. What Has Been Done to This Carburetor?1. Press down on vacuum piston link C until metering rods bottom in the carburetor body. Hold air horn upright with floats hanging. Carter WCFB 4 Barrel Carburetor Float System. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . 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. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Can't find the answer you're looking for? Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Fast, secure e-book download. Make sure the pump relief check is clean. Share. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. b. 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. Can't find the answer you're looking for? To correct, remove carburetor and turn it upside down. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. Carter WCFB 4 Barrel Carburetor Float System. Disassembly2. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. 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). We will contact you as soon as this product is available. 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. Ideas?? The download link can be found on your order confirmation email which you will receive as soon as you complete the order. When replacing them hold them tight against the wall while tightening the screw. Adjust by bending throttle connector rod at deepest angle as shown. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. On the WCFB the check ball is usually at the bottom of the pump well. Place the choke housing toward the left and remove upper right main body to throttle body screw. Ethanol leaves deposits behind that acts like corrosion. 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. 60 pages of great info. 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 correct way is to use a fuel pump pressure gauge. Gasket removed as shown A. 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. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. You may even have to resort to finding a used WCFB carburetor. Add a couple drops of oil to the leather. These diagrams include: Fig. Change the choke setting to index. You cannot go wrong with Mikes carburetor in any way. BBS) and were basically an on/off condition similar to the function of a power valve. Can't find the answer you're looking for. Recheck unloader settings with carburetor on the engine. Clogged idle tube, or passages in the idle circuit. 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. The carburetor will flood. Tyler's Forgotten Car Rescue 22,933 views. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. Gasket removed. Adjust by bending throttle connector rod at upper angle (B). Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. All late model WCFB carburetors have three different length bowl cover screws. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). Examine the viton tip for any marks.Fuel pump pressure could be too high. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. I have repeated multiple times with same results. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. 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). With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. Adjust by bending lip of float, not float arm. When that is the case, I bend the accel. Pulloffs : CUFWCFB2 $ 0 . The accelerator pump circuit resides on the primary side of. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. This restricts the flow of fuel. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. Product information . No metering rod gauges are necessary. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. Air Bled has the venturi tube pointing down into the bore. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. One is in the secondary venturi and the other just above the throttle plate. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Could the float bowl actually be the problem? 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. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. Hold a straight edge across top of dust cover housing, next to the pump arm. 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. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Note te larger box, and the number of additional tools from the 1935 set. However, it is very similar and I found it very useful. 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. Each size must be used in its own location. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. 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. 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. Put some fluid in theaccelerator pumpwell and press down on the pump. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. Carter WCFB 4 Barrel Adjust Float. Watch on. 1955 Pontiac - Loading or Carburetor Flooding What more could you ask for? Then close throttle. 2: Carter AFB idle mixture and speed adjustment screws. 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. Rotate throttle stop screw E until engine idle at approx 500 RPM. Check any vents to make sure they are open. Also make sure one isnt rubbing on the side. Can you help me out? 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. Solid fuel has the 2 tubes pointing up. This eliminates any bog or hesitation when acceleration. When removing valves they should be marked so that they get put back the same way. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. 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. 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. Coat threads of screw with sealing compound and install it. Hold throttle valve wide open and close choke valve as far as possible without forcing. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. The mixture screw may be bent, or damaged. 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. Put a straight edge across the dust cover as illustrated. Place the choke housing toward the left and remove upper right main body to throttle body screw. Adjust by bending float arms, making sure both pontoons on each float are the same height. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. 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. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Carter WCFB 4 Barrel Carburetor Float System. Someone has installed it improperly. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. 1st check to make sure the fast idle linkage isnt holding the valves open. Fig. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. 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. You can also check the adjustment by measuring (F) which should be 18/64. (note) The metering rods will fit into the jets loosely. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Hold air horn upside down with floats in place and gasket removed. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. 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. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Hold in place and carefully tighten metering rod arm set screw (G). Is there a pointed check weight in the main discharge hole. The accelerator pump circuit resides on the primary side of this carburetor. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Adjust by bending the choke connector rod at lower angle (H). cm448. 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). They sometimes need trimming. 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. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. 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. The flat surface of the pump arm should be parallel to the straight edge. 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.