carter wcfb carburetor adjustment carter wcfb carburetor adjustment

Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. Make sure the pontoons are centered and will not rub the bowl sides. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. Both valves should be closed. All late model WCFB carburetors have three different length bowl cover screws. Seat the discharge check by tapping lightly in the hole to form a good seal. When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. New fuel pumps are especially suspect. Measure float height as illustrated above. Older kits 30-70s. Blow through the intake check passage to be sure the passage is open. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. (note) The metering rods will fit into the jets loosely. There should be a retainer keeping the check ball in place. Metering rods for the WCFB have been out of production for several years now. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. It needs about 4 lbs of pressure. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. Some have a coating to give it a better shelf life. 1955 Chevy Hard starting after flooding. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. 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. Can't find the answer you're looking for? There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. Then close throttle. Test the floats in hot water and if you get any bubbles then they are leaking. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. Piston force is too much for linkage. The fuel is also conducted through a passage in the air horn to the secondary needle seat. 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 by bending float arms, making sure both pontoons on each float are the same height. Carter WCFB 4 Barrel Carburetor Float System. See figure 9F-2. 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. Carter WCFB 4 Barrel Carburetor Float System. The well should fill with fluid. One is in the secondary venturi and the other just above the throttle plate. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. The piston is brass and can be damaged very easily. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. No metering rod gauges are necessary. The discharge check is seated at this time to prevent air being drawn into the pump well. 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. Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. These diagrams include: Fig. Disassembly2. The Carter AFB uses weights, and therefore never goes out of adjustment. Any bubbles indicates a leak.Make sure the 2 floats are the same height. When I slow down to an idle, my engine runs rough. 1: Carter WCFB idle mixture and speed adustment screw location. BBS) and were basically an on/off condition similar to the function of a power valve. If not then clean it and try again. This check prevents excessive pressure in the discharge passage during acceleration. Fast, secure e-book download. Must be made after fast idle adjustment. 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. Seat the intake check by tapping lightly in the hole to form a good seal. Blowing out passages will not get them clean enough. 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. Float drop not set, or fuel pump pressure too low. The correct way is to use a fuel pump pressure gauge. Ideas?? Can't find the answer you're looking for? Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. When removing valves they should be marked so that they get put back the same way. Hold a straight edge across top of dust cover housing, next to the pump arm. Share. The ends of the connector rod should point to the throttle arm side. Adjust by bending the choke connector rod at lower angle (H). a. 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. It's highlighted yellow and will look something like this. 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 The download link will expire in 30 days. Hold air horn upright with floats hanging. Measure from toe B to air horn. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . Probably around 4- 4.5lbs. Test the needle by holding it down gently with a brass drift punch. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. Hold air horn upside down with floats in place and gasket removed. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. I have repeated multiple times with same results. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. If hard starting still exists change the choke setting to one point lean. To correct, remove carburetor and turn it upside down. Fig. 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 . 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. What more could you ask for? Adjust by bending throttle connector rod at deepest angle as shown. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. Put a straight edge across the dust cover as illustrated. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. Carter WCFB Fast Idle With carburetor installed and engine warmed up. We will contact you as soon as this product is available. 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). 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. Measure from center top surface of pontoons to air horn. Aspringis inserted in the power piston hole, then the piston. 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. Outside top of early Carter tool box with correct decal. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. The ends of the connector rod should point to the throttle arm side. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. Adjust by bending arm (J) on choke trip lever. Install the pump connector rod (D) in the outer hole, long stroke. Adjusting the WCFB float level and float drop. Coat threads of screw with sealing compound and install it. Tyler's Forgotten Car Rescue 22,933 views. Gasket removed as shown A. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). All These Part Numbers Interchange Into Our Part No. Watch on. Eckler's Premier Quality Products 57132129 Chevy Carburetor Rebuild Kit Carter WCFB Replacement Kit Includes All Gaskets, Seals, Check Balls, Springs, Accelerator Pump & Needle Valve Read more CARTER 4 Barrel WCFB DUAL CARBURETOR KITS & FUEL FILTERS 1961-65 CHEVROLET 1955-56 DESOTO April 18, 2018 Carter Carburetors Rebuild Kits 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. The accelerator pump circuit resides on the primary side of. 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. This eliminates any bog or hesitation when acceleration. Place the choke housing toward the left and remove upper right main body to throttle body screw. Rotate throttle stop screw E until engine idle at approx 500 RPM. Pulloffs : CUFWCFB2 $ 0 . Can't find the answer you're looking for? Carter WCFB 4 Barrel Adjust Float. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. Refer to the Adjustment Data Table for adjustment dimensions. 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. 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. Make sure the air horn contacts the inner wall of the bowl. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. 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). *New Accelerator Pump5. Gasket between bowl and base is installed backwards (easy to do). The lower edge of vent valve cap should be raised above surface of dust cover the distance listed in the. Hold throttle valve wide open and close choke valve as far as possible without forcing. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. 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. 5:04. Gasket removed. 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 vacuum piston is no longer produced and can only be found as a NOS piece, or used. You may even have to resort to finding a used WCFB carburetor. They work fine when I push hard down on the piston. *New Main Body Gasket8. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. Most of the single step rods were steel. Other than that, great company to deal with. Can't find the answer you're looking for? This allows air instead of fuel to be drawn off the pump jets. 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. William C. Carter was born in Union City Tennessee in 1884. 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. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. Two ports act as calibrated air bleeds. Ethanol gas does not have much if any lubrication. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. To correct, remove carburetor and turn it upside down. With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. They sometimes need trimming. If a loss of rpm is noted, or if the engine dies, and air leak exists. WCFB Carburetor Cutting Out on Left Hand Turn. Note te larger box, and the number of additional tools from the 1935 set. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. 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 Watch this. Your friend will receive an email from you with a link to our site. Test the fuel pump to be sure it isnt putting out too much pressure. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. Ultra-Sonic Cleaning3. Make sure the air cleaner gasket does not block the bowl vents. Make sure there is a check needle below the main discharge. Make sure the ball rattles. Fig. 1st check to make sure the fast idle linkage isnt holding the valves open. Correct by removing any burrs or nicks. The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. 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. 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. Make sure manifold heat control valve is free. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Carburetors equipped with an adjustable bowl vent require adjustment. Change the choke setting to index. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn They know their stuff and provide technical assistance and guides in both paper and video formats. Coat threads of screw with sealing compound and install it. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. 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.