carter wcfb carburetor adjustment carter wcfb carburetor adjustment

The most complete document I have found. 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. Carter WCFB 4 Barrel Adjust Float. DO NOT apply any pressure on the needle. 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. Air Bled has the venturi tube pointing down into the bore. Install the pump connector rod (D) in the outer hole, long stroke. Adjust by bending arm (J) on choke trip lever. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. 1: Carter WCFB idle mixture and speed adustment screw location. Most of the single step rods were steel. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. Can't find the answer you're looking for? William C. Carter was born in Union City Tennessee in 1884. Then close throttle. Some models have a pump relief check in the bottom of the fuel bowl. 1st check to make sure the fast idle linkage isnt holding the valves open. On 1956 models one point rich. *New Airhorn Gasket7. Ethanol gas does not have much if any lubrication. Probably not since only one butterfly is open. Other than that, great company to deal with. 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). Rotate throttle stop screw E until engine idle at approx 500 RPM. Can't find the answer you're looking for? 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. 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 (. The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. Ultra-Sonic Cleaning3. 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. We will contact you as soon as this product is available. The file is in PDF format, you can download and save/print a copy. There should be a retainer keeping the check ball in place. Do not depress float lip against spring in needle, but let float rest of its own weight. Carter WCFB, 4 barrel carburetor manual. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . When closing the throttle, the accelerator moves up in the pump well. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Take the top off and put the pump in the well all the way to the bottom. 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. When that is the case, I bend the accel. Watch on. If not then clean it and try again. It needs about 4 lbs of pressure. Place the choke housing toward the left and remove upper right main body to throttle body screw. 2: Carter AFB idle mixture and speed adjustment screws. (note) The metering rods will fit into the jets loosely. Place the choke housing toward the left and remove upper right main body to throttle body screw. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. 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. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. When done you should see very little daylight around the valve. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. 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. 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. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. All These Part Numbers Interchange Into Our Part No. All late model WCFB carburetors have three different length bowl cover screws. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. The Carter AFB uses weights, and therefore never goes out of adjustment. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Gasket between bowl and base is installed backwards (easy to do). Can't find the answer you're looking for? Make sure the air horn contacts the inner wall of the bowl. Run a blunt object around the inside of the leather cup to make sure any coating is broken. Enter Carb Number. Did the old gasket get removed? 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. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. No metering rod gauges are necessary. Disassembly2. This can be done by looking at the impression on bowl cover gasket. 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 . Carter WCFB Build Sheets How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. Carter WCFB 4 Barrel Carburetor Float System. Any bubbles indicates a leak.Make sure the 2 floats are the same height. The accelerator pump circuit resides on the primary side of this carburetor. Two ports act as calibrated air bleeds. One of the butterflies is open about 1/8 with the carburetor dis assembled. 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. 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. Coat threads of screw with sealing compound and install it. Product information . The flat on top of the pump arm should be parallel to the straight edge. Ethanol leaves deposits behind that acts like corrosion. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. Sometimes scraping around the edges with an awl will remove the staking. Ideas?? Check throttle linkage to make sure that primary throttle valves come to full wide open position. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. You are flooding (getting too much gas in the float bowl), caused by these types of problems. Recheck float adjustments. Free shipping for many products! Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. It should not be opened up. 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. They work fine when I push hard down on the piston. 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 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. This restricts the flow of fuel. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. Adjust by bending lip of float, not float arm. Make sure the pontoons are centered and will not rub the bowl sides. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. Adjust by bending throttle connector rod at deepest angle as shown. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. Both valves should be closed. 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. See figure 9F-2. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. Secondarys are somehow stuck open (which amounts to a vacuum leak). 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. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. 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. Carburetors equipped with an adjustable bowl vent require adjustment. 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. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). On the WCFB the check ball is usually at the bottom of the pump well. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Correct by removing any burrs or nicks. Test the fuel pump to be sure it isnt putting out too much pressure. 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! 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. Adjusting the WCFB float level and float drop. This eliminates any bog or hesitation when acceleration. To correct, remove carburetor and turn it upside down. Carter WCFB 4 Barrel Carburetor Float System. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. 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. Rochester and Carter replacement parts are interchangeable. New fuel pumps are especially suspect. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Quick test to see if the accelerator pump is working. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. Seat the intake 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. Refer to the Adjustment Data Table for adjustment dimensions. What Has Been Done to This Carburetor?1. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. The mixture screw may be bent, or damaged. Blowing out passages will not get them clean enough. Outside top of early Carter tool box with correct decal. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Gasket removed. The discharge check is seated at this time to prevent air being drawn into the pump well. This is an electronic rebuild manual, no physical copy will be provided. Could the float bowl actually be the problem? Carter WCFB Rebuild kits: Rebuild Kits. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Clogged idle tube, or passages in the idle circuit. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. Older kits 30-70s. Disassembly2. Back off the idle screw so that the throttle plates close completely. The adjustment of the pump is important in order to get the required fuel.