Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. The piston is brass and can be damaged very easily. Piston force is too much for linkage. The discharge check is seated at this time to prevent air being drawn into the pump well. Some models have a pump relief check in the bottom of the fuel bowl. Seat the discharge check by tapping lightly in the hole to form a good seal. 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 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. 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. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. Low fuel pump pressure always check you motors manual for the correct pressure. One of the butterflies is open about 1/8 with the carburetor dis assembled. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. Can you help me out? To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. Use a brass drift punch. William C. Carter was born in Union City Tennessee in 1884. 1955 Pontiac - Loading or Carburetor Flooding 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. 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. 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. 3: Holley 4150 idle mixture and speed adjustment screws. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. During high speed operation a vacuum exists at the pump jets. 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. It should not be opened up. Fig. Do not depress float lip against spring in needle, but let float rest of its own weight. Everyone Has Started an Engine in the . Each size must be used in its own location. Probably around 4- 4.5lbs. If a loss of rpm is noted, or if the engine dies, and air leak exists. 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. I. DISASSEMBLY. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. *New Float6. 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. 2: Carter AFB idle mixture and speed adjustment screws. The correct way is to use a fuel pump pressure gauge. The adjustment of the pump is important in order to get the required fuel. 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. When I slow down to an idle, my engine runs rough. Examine the viton tip for any marks.Fuel pump pressure could be too high. 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. 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. Carter WCFB 4 Barrel Carburetor Float System. Carter WCFB Build Sheets 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. This restricts the flow of fuel. Hold a straight edge across top of dust cover housing, next to the pump arm. 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. Can't find the answer you're looking for? The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. Any bubbles indicates a leak.Make sure the 2 floats are the same height. Adjust by bending unloader lip on throttle shaft lever. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. WCFB carburetors, althqugh basically all units are allke. This can be done by looking at the impression on bowl cover gasket. Run a blunt object around the inside of the leather cup to make sure any coating is broken. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. . Make sure these are clear if you have percolation problems. Make sure manifold heat control valve is free. *New Airhorn Gasket7. This box did not have a part number. Adjust by bending the choke connector rod at lower angle (H). Coat threads of screw with sealing compound and install it. Your friend will receive an email from you with a link to our site. 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. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. *New Accelerator Pump5. Check throttle linkage to make sure that primary throttle valves come to full wide open position. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. One is in the secondary venturi and the other just above the throttle plate. Can't find the answer you're looking for. The download link will expire in 30 days. The file is in PDF format, you can download and save/print a copy. If not, then find the check ball and make sure it is loose. 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. 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. Could the float bowl actually be the problem? As for the pump not squirting.I suspect the pump well isnt filling up. 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. You cannot go wrong with Mikes carburetor in any way. 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. a. 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. Ideas?? The fuel is also conducted through a passage in the air horn to the secondary needle seat. The accelerator pump circuit resides on the primary side of. Ethanol gas does not have much if any lubrication. The metering rod adjustment should be done after the pump adjustment. The adjustment of the pump is important in order to get the required fuel. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. They are not meant to fill the hole, only to restrict it. 1: Carter WCFB idle mixture and speed adustment screw location. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. Make sure the ball rattles. Check any vents to make sure they are open. The flat surface of the pump arm should be parallel to the straight edge. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Put some fluid in theaccelerator pumpwell and press down on the pump. 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? Older kits 30-70s. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. 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. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. The setups data is the same. Adjust by bending arm (J) on choke trip lever. Watch this. Free shipping for many products! Make sure there is a check needle below the main discharge. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). 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! 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. When removing valves they should be marked so that they get put back the same way. Good quality print. The ends of the connector rod should point to the throttle arm side. Outside top of early Carter tool box with correct decal. You need to run wire down all small passages. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Then close throttle. Rochester and Carter replacement parts are interchangeable. Press down on vacuum piston link C until metering rods bottom in the carburetor body. You may even have to resort to finding a used WCFB carburetor. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. When replacing them hold them tight against the wall while tightening the screw. When that is the case, I bend the accel. When done you should see very little daylight around the valve. They know their stuff and provide technical assistance and guides in both paper and video formats. Two ports act as calibrated air bleeds. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. When closing the throttle, the accelerator moves up in the pump well. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. Adjusting the WCFB float level and float drop. DO NOT apply any pressure on the needle. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Metering rods for the WCFB have been out of production for several years now. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. Ethanol leaves deposits behind that acts like corrosion. Fig. Put a straight edge across the dust cover as illustrated. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. b. Some have a coating to give it a better shelf life. This restricts the flow of fuel. 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. Carter WCFB, 4 barrel metering rod adjustment instructions. BBS) and were basically an on/off condition similar to the function of a power valve. Product information . 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. Note te larger box, and the number of additional tools from the 1935 set. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. This is an electronic rebuild manual, no physical copy will be provided. The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. They work fine when I push hard down on the piston. 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. 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. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. This check prevents excessive pressure in the discharge passage during acceleration. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn Any pressure put on the needle will damage it. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Disassembly2. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Technical Details. Is there a pointed check weight in the main discharge hole. Correct by removing any burrs or nicks. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. Recheck unloader settings with carburetor on the engine. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link.