Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. 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. Install the pump connector rod (D) in the outer hole, long stroke. Install the pump connector rod (D) in the outer hole, long stroke. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Coat threads of screw with sealing compound and install it. Can't find the answer you're looking for? 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. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Your friend will receive an email from you with a link to our site. With throttle valves seated in bores, dust cover and gasket in place. If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. 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. Solid fuel has the 2 tubes pointing up. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. 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. *New Main Body Gasket8. 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. 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. 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. Then close throttle. 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. 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. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. It should not be opened up. Older kits 30-70s. 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. Put a straight edge across the dust cover as illustrated. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. This is an electronic rebuild manual, no physical copy will be provided. Place the choke housing toward the left and remove upper right main body to throttle body screw. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. However, it is very similar and I found it very useful. Seat the discharge check by tapping lightly in the hole to form a good seal. Carter WCFB Fast Idle With carburetor installed and engine warmed up. 1956 Plymouth, Powerflite Transmission - Dashpot The dashpot has been eliminated. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. The most complete document I have found. Make sure the air cleaner gasket does not block the bowl vents. Adjust idle screws D to produce a smooth idle of correct speed is obtained. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. 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! Carter WCFB Build Sheets The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. This allows air instead of fuel to be drawn off the pump jets. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. In this video I show you how to replace the fast idle spring on the WCFB carburetor. Good quality print. 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. Carter WCFB Rebuild kits: Rebuild Kits. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. Disassembly2. 1st check to make sure the fast idle linkage isnt holding the valves open. The adjustment of the pump is important in order to get the required fuel. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. 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. WCFB carburetors, althqugh basically all units are allke. As for the pump not squirting.I suspect the pump well isnt filling up. With mineral spirits in the float bowl, Raise the pump. They sometimes need trimming. The best-selling product Click now to browse 1957 LINCOLN ACCELERATOR PUMP CARTER WCFB FLUORELASTOMER CUP ETHANOL RESITANTIS we ship worldwide cch-rc.com, C $45.04 Free shipping for many products Find many great new & used options and get the best deals for 1957 LINCOLN ACCELERATOR PUMP CARTER WCFB FLUORELASTOMER CUP ETHANOL RESITANTIS at the . 3: Holley 4150 idle mixture and speed adjustment screws. but if it runs well you don't really need to make any adjustments. To correct, remove carburetor and turn it upside down. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. It needs about 4 lbs of pressure. Carter WCFB 4 Barrel Carburetor Float System. Take the top off and put the pump in the well all the way to the bottom. The correct way is to use a fuel pump pressure gauge. Adjust by bending unloader lip on throttle shaft lever. Float drop not set, or fuel pump pressure too low. The mixture screw may be bent, or damaged. Watch on. Make sure there is a check needle below the main discharge. You need to run wire down all small passages. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. Adjust by bending float arms, making sure both pontoons on each float are the same height. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. This box did not have a part number. Could the float bowl actually be the problem? Coat threads of screw with sealing compound and install it. This check prevents excessive pressure in the discharge passage during acceleration. 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. Make sure these are clear if you have percolation problems. Refer to the Adjustment Data Table for adjustment dimensions. Share. parts. a. They are staked in the hole. 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 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. Adjust idle screws D to produce a smooth idle of correct speed is obtained. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). Run a blunt object around the inside of the leather cup to make sure any coating is broken. 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. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. They are not meant to fill the hole, only to restrict it. Adjust by bending the choke connector rod at lower angle (H). Change the choke setting to index. 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). 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. 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. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . I. DISASSEMBLY. Make sure the pontoons are centered and will not rub the bowl sides. Adjust by bending lip of float, not float arm. William C. Carter was born in Union City Tennessee in 1884. 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. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. Check any vents to make sure they are open. Can't find the answer you're looking for? Probably not since only one butterfly is open. 1955 Pontiac - Loading or Carburetor Flooding Seat the intake check by tapping lightly in the hole to form a good seal. Most of the single step rods were steel. This spring is a bit complicated so this video will be very helpful when you change your spring.Find this WCFB spring here: https://www.carburetor-parts.com/wcfb-66d400.htmlFind WCFB parts here:https://www.carburetor-parts.com/wcfb-partscontents:00:0000:42 removing fast idle cam assembly00:56 taking the assembly apart piece by piece01:07 removing the old spring01:22 installing spring02:15 which direction does the pieces go?02:38 assembling the pieces03:16 installing the cam assembly onto the carburetor Someone has installed it improperly. To correct, remove carburetor and turn it upside down. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. 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. 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. 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 . The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. Loosen the clamp screw A Press. Can't find the answer you're looking for. I have repeated multiple times with same results. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. *New Airhorn Gasket7. Pulloffs : CUFWCFB2 $ 0 . . 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. 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 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. 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 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. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. This restricts the flow of fuel. Ethanol gas does not have much if any lubrication. These diagrams include: Fig. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. The fuel is also conducted through a passage in the air horn to the secondary needle seat. 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). Gasket removed as shown A. What more could you ask for? 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. The ends of the connector rod should point to the throttle arm side. Put some fluid in theaccelerator pumpwell and press down on the pump. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Carter WCFB 4 Barrel Carburetor Float System. Air Bled has the venturi tube pointing down into the bore. You can also check the adjustment by measuring (F) which should be 18/64. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. Piston force is too much for linkage. You cannot go wrong with Mikes carburetor in any way. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. Other than that, great company to deal with. 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 Disassembly2. Hold in place and carefully tighten metering rod arm set screw (G). See figure 9F-2. Fast, secure e-book download. You should feel some pressure and fluid should not be bypassing the check needle. Free shipping for many products! Note te larger box, and the number of additional tools from the 1935 set. The accelerator pump circuit resides on the primary side of. 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 With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. 1: Carter WCFB idle mixture and speed adustment screw location. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Hold air horn upside down with floats in place and gasket removed. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. 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. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. *New Float6. Test the floats in hot water and if you get any bubbles then they are leaking. 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? 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. 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). The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. Can't find the answer you're looking for? One of the butterflies is open about 1/8 with the carburetor dis assembled. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. Technical Details. Be sure these ports are clear. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. This is an electronic rebuild manual, no physical copy will be provided. Recheck float adjustments. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Tyler's Forgotten Car Rescue 22,933 views. Both valves should be closed. Can't find the answer you're looking for? We will contact you as soon as this product is available. No metering rod gauges are necessary. (note) The metering rods will fit into the jets loosely. Outside top of early Carter tool box with correct decal. Also make sure one isnt rubbing on the side. Back out throttle screw so that the throttle valve close completly. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. You may even have to resort to finding a used WCFB carburetor. Carter WCFB 4 Barrel Carburetor Float System. 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. Adjust by bending throttle connector rod at deepest angle as shown. 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 . Blow air through the main discharge to make sure the passage is clear all the way to the pump well. Carter WCFB, 4 barrel metering rod adjustment instructions. Blowing out passages will not get them clean enough. Make sure the air horn contacts the inner wall of the bowl. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. The file is in PDF format, you can download and save/print a copy. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Adjust by bending throttle connector rod at upper angle (B). Carter WCFB 4 Barrel Carburetor Float System. Gasket removed. 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. The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. When I slow down to an idle, my engine runs rough. Carburetors equipped with an adjustable bowl vent require adjustment. This eliminates any bog or hesitation when acceleration. Metering rods for the WCFB have been out of production for several years now. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). Please complete the fields below to send your friend a link to this product. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn One is in the secondary venturi and the other just above the throttle plate. Do not depress float lip against spring in needle, but let float rest of its own weight. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. WCFB Carburetor Cutting Out on Left Hand Turn. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. With carburetor installed and engine warmed up. If a loss of rpm is noted, or if the engine dies, and air leak exists. On 1956 models one point rich. Any bubbles indicates a leak.Make sure the 2 floats are the same height. 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. The discharge check is seated at this time to prevent air being drawn into the pump well. Product information . When that is the case, I bend the accel. cm448. Hold a straight edge across top of dust cover housing, next to the pump arm. All These Part Numbers Interchange Into Our Part No. Adjust by bending the connector rod at the lower bend (E). Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. Press down on vacuum piston link C until metering rods bottom in the carburetor body. The metering rod adjustment should be done after the pump adjustment. Fig. The carburetor will flood. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. 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. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . Why Doesn't Adjusting Idle Mixture Screws Make any Difference? 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. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Ultra-Sonic Cleaning3. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. Some have a coating to give it a better shelf life. Carter WCFB 4 Barrel Adjust Float. Each size must be used in its own location. The accelerator pump circuit resides on the primary side of this carburetor. Do not depress float lip against spring in needle, but let float rest of its own weight. 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 the engine gets hot and then is shut off, gas can sometimes overheat and then boil. Two ports act as calibrated air bleeds. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. Make sure manifold heat control valve is free. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. Low fuel pump pressure always check you motors manual for the correct pressure. Rochester and Carter replacement parts are interchangeable. Examine the viton tip for any marks.Fuel pump pressure could be too high. 1955 Chevy Hard starting after flooding. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. The single step rods were used on some of the price leader carburetors (i.e. Fig. Rotate throttle stop screw E until engine idle at approx 500 RPM. 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 (.
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