Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. Good quality print. This restricts the flow of fuel. Carter WCFB, 4 barrel metering rod adjustment instructions. Solid fuel has the 2 tubes pointing up. It's highlighted yellow and will look something like this. *New Main Body Gasket8. Be sure these ports are clear. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. 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. Must be made after fast idle adjustment. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. 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. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. Each size must be used in its own location. 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. 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). You cannot go wrong with Mikes carburetor in any way. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. 2: Carter AFB idle mixture and speed adjustment screws. Fig. Can't find the answer you're looking for? Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. You need to run wire down all small passages. Seat the discharge check by tapping lightly in the hole to form a good seal. Anti-Rust "Dichromate" Finish**4. The file is in PDF format, you can download and save/print a copy. The metering rod adjustment should be done after the pump adjustment. FREE to our customers that buy a rebuild kit. 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. a. DO NOT apply any pressure on the needle. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. The adjustment of the pump is important in order to get the required fuel. 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. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn 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. WCFB Carburetor Cutting Out on Left Hand Turn. Seat the intake check by tapping lightly in the hole to form a good seal. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. Ethanol leaves deposits behind that acts like corrosion. With carburetor installed and engine warmed up. Rotate throttle stop screw E until engine idle at approx 500 RPM. A WGD usually has a pump arm like that of a WCFB (IIRC). The download link will expire in 30 days. Ultra-Sonic Cleaning3. The mixture screw may be bent, or damaged. You are flooding (getting too much gas in the float bowl), caused by these types of problems. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. Product information . Disassembly2. 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 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 mineral spirits in the float bowl, Raise the pump. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Pulloffs : CUFWCFB2 $ 0 . Adjust by bending throttle connector rod at deepest angle as shown. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Adjust by bending unloader lip on throttle shaft lever. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Outside top of early Carter tool box with correct decal. Back out throttle stop screw until throttle valves seat in bores. When that is the case, I bend the accel. Carter WCFB 4 Barrel Carburetor Float System. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). Install the pump connector rod (D) in the outer hole, long stroke. 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. Technical Details. Hold throttle valve wide open and close choke valve as far as possible without forcing. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. The accelerator pump circuit resides on the primary side of this carburetor. Did the old gasket get removed? 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Examine the viton tip for any marks.Fuel pump pressure could be too high. On 1956 models one point rich. Do not depress float lip against spring in needle, but let float rest of its own weight. 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. 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. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. One is in the secondary venturi and the other just above the throttle plate. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. I. DISASSEMBLY. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. The ends of the connector rod should point to the throttle arm side. The Carter AFB uses weights, and therefore never goes out of adjustment. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. Probably not since only one butterfly is open. To correct, remove carburetor and turn it upside down. Hold air horn upside down with floats in place and gasket removed. 1955 Pontiac - Loading or Carburetor Flooding Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! Refer to the Adjustment Data Table for adjustment dimensions. Quick test to see if the accelerator pump is working. 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 accelerator pump circuit resides on the primary side of. New fuel pumps are especially suspect. (note) The metering rods will fit into the jets loosely. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. Watch this. Check throttle linkage to make sure that primary throttle valves come to full wide open position. If a loss of rpm is noted, or if the engine dies, and air leak exists. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. Ultra-Sonic Cleaning3. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. All late model WCFB carburetors have three different length bowl cover screws. The most complete document I have found. All These Part Numbers Interchange Into Our Part No. 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? This allows air instead of fuel to be drawn off the pump jets. Use a brass drift punch. Also make sure one isnt rubbing on the side. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Hold air horn upright with floats hanging. The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. Gasket removed. 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. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. Back out throttle screw so that the throttle valve close completly. The flat on top of the pump arm should be parallel to the straight edge. Secondarys are somehow stuck open (which amounts to a vacuum leak). Your friend will receive an email from you with a link to our site. Carter WCFB 4 Barrel Carburetor Float System. Float drop not set, or fuel pump pressure too low. Notice holes from which linkage rods are removed so they can Air Bled has the venturi tube pointing down into the bore. No metering rod gauges are necessary. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. 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. Some have a coating to give it a better shelf life. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Fast, secure e-book download. It needs about 4 lbs of pressure. 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 fuel is also conducted through a passage in the air horn to the secondary needle seat. However, it is very similar and I found it very useful. I have repeated multiple times with same results. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. 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. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. 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.
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