carter wcfb carburetor adjustment

Use a brass drift punch. Rotate throttle stop screw E until engine idle at approx 500 RPM. 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. What Has Been Done to This Carburetor?1. Make sure these are clear if you have percolation problems. 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. Rochester and Carter replacement parts are interchangeable. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. The file is in PDF format, you can download and save/print a copy. Clogged idle tube, or passages in the idle circuit. I. DISASSEMBLY. Can you help me out? Ethanol gas does not have much if any lubrication. If not then clean it and try again. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. 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. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Air Bled has the venturi tube pointing down into the bore. 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. Run a blunt object around the inside of the leather cup to make sure any coating is broken. Check any vents to make sure they are open. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . Back out throttle stop screw until throttle valves seat in bores. Please complete the fields below to send your friend a link to this product. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Coat threads of screw with sealing compound and install it. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. 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. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. This restricts the flow of fuel. I have repeated multiple times with same results. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. 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. Carter WCFB 4 Barrel Carburetor Float System. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! This is an electronic rebuild manual, no physical copy will be provided. Solid fuel has the 2 tubes pointing up. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Carter WCFB 4 Barrel Adjust Float. 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. Make sure the ball rattles. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Metering rods for the WCFB have been out of production for several years now. Put a straight edge across the dust cover as illustrated. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Master Technician Tool Set (early, circa 1935, for 1923~1935 Carter carburetors all makes - most tools then current) Carter Master Technician Tool Set about 1951. To correct, remove carburetor and turn it upside down. cm448. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. Blow through the intake check passage to be sure the passage is open. Make sure manifold heat control valve is free. Older kits 30-70s. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. If a loss of rpm is noted, or if the engine dies, and air leak exists. Your friend will receive an email from you with a link to our site. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Hold throttle valve wide open and close choke valve as far as possible without forcing. 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. Aspringis inserted in the power piston hole, then the piston. 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. *New Airhorn Gasket7. Can't find the answer you're looking for? Anti-Rust "Dichromate" Finish**4. *New Float6. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. 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. Contact Us Home Blog FAQ's Technical Help My Account LoginRegister Examples of Carb Numbers search 0$0 Carburetor Parts by Make & Model Scroll to see more Aero Coach Carburetor Parts Alfa Romeo American Bantam American General American LaFrance American Motors Nash Rambler Auburn Audi Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. 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 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). Product information . Examine the viton tip for any marks.Fuel pump pressure could be too high. 1955 Chevy Hard starting after flooding. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. They are not meant to fill the hole, only to restrict it. We will contact you as soon as this product is available. Ultra-Sonic Cleaning3. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. Press down on vacuum piston link C until metering rods bottom in the carburetor body. 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. Make sure the air cleaner gasket does not block the bowl vents. The flat surface of the pump arm should be parallel to the straight edge. 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. Ultra-Sonic Cleaning3. Disassembly2. Some have a coating to give it a better shelf life. Quick test to see if the accelerator pump is working. It's highlighted yellow and will look something like this. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. Correct by removing any burrs or nicks. This eliminates any bog or hesitation when acceleration. The adjustment of the pump is important in order to get the required fuel. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. a. With mineral spirits in the float bowl, Raise the pump. Measure float height as illustrated above. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. It needs about 4 lbs of pressure. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. William C. Carter was born in Union City Tennessee in 1884. but if it runs well you don't really need to make any adjustments. Can't find the answer you're looking for? 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. Probably not since only one butterfly is open. Fast, secure e-book download. Be sure these ports are clear. Place the choke housing toward the left and remove upper right main body to throttle body screw. Disassembly2. Carter WCFB 4 Barrel Carburetor Float System. Adjust by bending the connector rod at the lower bend (E). Back out throttle screw so that the throttle valve close completly. Both valves should be closed. Seat the intake check by tapping lightly in the hole to form a good seal. Other than that, great company to deal with. You need to run wire down all small passages. Test the floats in hot water and if you get any bubbles then they are leaking. 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. Can't find the answer you're looking for? Adjust by bending throttle connector rod at upper angle (B). parts. (note) The metering rods will fit into the jets loosely. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. Back off the idle screw so that the throttle plates close completely. Carter WCFB Fast Idle With carburetor installed and engine warmed up. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). Blow air through the main discharge to make sure the passage is clear all the way to the pump well. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. New fuel pumps are especially suspect. Gasket removed as shown A. To correct, remove carburetor and turn it upside down. What more could you ask for? Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. You can also check the adjustment by measuring (F) which should be 18/64. Float drop not set, or fuel pump pressure too low. 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. The ends of the connector rod should point to the throttle arm side. Make sure the pump relief check is clean. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. Adjust by bending throttle connector rod at deepest angle as shown. 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. 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). Pulloffs : CUFWCFB2 $ 0 . One is in the secondary venturi and the other just above the throttle plate. Hold air horn upright with floats hanging. features a Carter carburetor identification page and a function that allows you to conduct a search by entering an identification number Factory Carter AFB CFM Ratings Chart Rebuild pics The April 15th, 2019 - The carbs with 1 1 4 venturies and 1 7 16 primary bores and 1 11 16 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. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. Two ports act as calibrated air bleeds. They sometimes need trimming. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. 3: Holley 4150 idle mixture and speed adjustment screws. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. 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. The Carter AFB uses weights, and therefore never goes out of adjustment. 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. With carburetor installed and engine warmed up. 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 carburetor will flood. Carter WCFB 4 Barrel Carburetor Float System. Sometimes scraping around the edges with an awl will remove the staking. The piston is brass and can be damaged very easily. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Adjust by bending arm (J) on choke trip lever. 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. 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

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