Two ports act as calibrated air bleeds. 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). 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. If a loss of rpm is noted, or if the engine dies, and air leak exists. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. 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. If not, then find the check ball and make sure it is loose. Carter WCFB, 4 barrel metering rod adjustment instructions. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. a. All These Part Numbers Interchange Into Our Part No. Can't find the answer you're looking for? WCFB carburetors, althqugh basically all units are allke. (note) The metering rods will fit into the jets loosely. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. 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. Hold a straight edge across top of dust cover housing, next to the pump arm. Hold in place and carefully tighten metering rod arm set screw (G). If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. Must be made after fast idle adjustment. Metering rods for the WCFB have been out of production for several years now. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Fig. With carburetor installed and engine warmed up. *New Accelerator Pump5. Gasket removed. 1955 Pontiac - Loading or Carburetor Flooding The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. Adjusting the WCFB float level and float drop. Your friend will receive an email from you with a link to our site. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. This check prevents excessive pressure in the discharge passage during acceleration. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. No metering rod gauges are necessary. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. Be sure these ports are clear. Be careful removing the intake check retainer. Could the float bowl actually be the problem? 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. What more could you ask for? 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. You should feel some pressure and fluid should not be bypassing the check needle. This restricts the flow of fuel. Both valves should be closed. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Carter WCFB 4 Barrel Carburetor Float System. DO NOT apply any pressure on the needle. Make sure the air horn contacts the inner wall of the bowl. Good quality print. When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. This restricts the flow of fuel. 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 . Make sure the pontoons are centered and will not rub the bowl sides. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. Rotate throttle stop screw E until engine idle at approx 500 RPM. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. Adjust by bending throttle connector rod at deepest angle as shown. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. 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. Can't find the answer you're looking for? Put a straight edge across the dust cover as illustrated. On 1956 models one point rich. The well should fill with fluid. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. 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. Check throttle linkage to make sure that primary throttle valves come to full wide open position. Adjust by bending the choke connector rod at lower angle (H). 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. Watch on. When I slow down to an idle, my engine runs rough. Please complete the fields below to send your friend a link to this product. This box did not have a part number. 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. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Clogged idle tube, or passages in the idle circuit. Coat threads of screw with sealing compound and install it. With mineral spirits in the float bowl, Raise the pump. The metering rod adjustment should be done after the pump adjustment. Note te larger box, and the number of additional tools from the 1935 set. Did the old gasket get removed? Some have a coating to give it a better shelf life. Free shipping for many products! Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. The ends of the connector rod should point to the throttle arm side. Check any vents to make sure they are open. Adjust by bending the connector rod at the lower bend (E). The file is in PDF format, you can download and save/print a copy. It should not be opened up. Disassembly2. The WCFB carburetor which came on some of the earliest Correct by removing any burrs or nicks. The setups data is the same. You cannot go wrong with Mikes carburetor in any way. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Is there a pointed check weight in the main discharge hole. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. The carburetor will flood. FREE to our customers that buy a rebuild kit. Use a brass drift punch. They know their stuff and provide technical assistance and guides in both paper and video formats. Recheck unloader settings with carburetor on the engine. In this video I show you how to replace the fast idle spring on the WCFB carburetor. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Can't find the answer you're looking for? 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. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. Put some fluid in theaccelerator pumpwell and press down on the pump. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. cm448. 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. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Fast, secure e-book download. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. The flat on top of the pump arm should be parallel to the straight edge. New fuel pumps are especially suspect. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. 60 pages of great info. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Older kits 30-70s. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. 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. Ideas?? . Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. 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 Quick test to see if the accelerator pump is working. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. 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. 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. 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. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. The discharge check is seated at this time to prevent air being drawn into the pump well. Back out throttle screw so that the throttle valve close completly. 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. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. 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 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. *New Float6. These diagrams include: Fig. Probably around 4- 4.5lbs. Rotate throttle stop screw E until engine idle at approx 500 RPM. To correct, remove carburetor and turn it upside down. b. 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 4 Barrel Carburetor Float System. 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.