carter wcfb carburetor adjustment

Hold throttle valve wide open and close choke valve as far as possible without forcing. 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. To correct, remove carburetor and turn it upside down. Watch on. Change the choke setting to index. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. Metering rods for the WCFB have been out of production for several years now. The well should fill with fluid. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. 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. We will contact you as soon as this product is available. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Put a straight edge across the dust cover as illustrated. This is percolation. 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. What Has Been Done to This Carburetor?1. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. 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 flat on top of the pump arm should be parallel to the straight edge. The file is in PDF format, you can download and save/print a copy. The mixture screw may be bent, or damaged. It needs about 4 lbs of pressure. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. BBS) and were basically an on/off condition similar to the function of a power valve. Watch this. (note) The metering rods will fit into the jets loosely. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. This can be done by looking at the impression on bowl cover gasket. Quick test to see if the accelerator pump is working. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . 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 Includes theory, diagrams, detailed specifications, tune-up data and complete overhaul procedures. *New Accelerator Pump5. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. The piston is brass and can be damaged very easily. Also make sure one isnt rubbing on the side. Can't find the answer you're looking for? 1955 Chevy Hard starting after flooding. Tyler's Forgotten Car Rescue 22,933 views. Hold air horn upside down with floats in place and gasket removed. Hold in place and carefully tighten metering rod arm set screw (G). Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. The most complete document I have found. 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. No metering rod gauges are necessary. Test the fuel pump to be sure it isnt putting out too much pressure. This allows air instead of fuel to be drawn off the pump jets. Adjust by bending arm (J) on choke trip lever. 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 . Press down on vacuum piston link C until metering rods bottom in the carburetor body. With mineral spirits in the float bowl, Raise the pump. DO NOT apply any pressure on the needle. This eliminates any bog or hesitation when acceleration. To correct, remove carburetor and turn it upside down. This restricts the flow of fuel. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. 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. Any pressure put on the needle will damage it. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. Do not depress float lip against spring in needle, but let float rest of its own weight. As for the pump not squirting.I suspect the pump well isnt filling up. The adjustment of the pump is important in order to get the required fuel. You are flooding (getting too much gas in the float bowl), caused by these types of problems. b. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. 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. 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 (. Carter WCFB 4 Barrel Carburetor Float System. Gasket between bowl and base is installed backwards (easy to do). As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. The cfm of the Carter WCFB four-barrel carburetor is approximately 400. 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 . 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. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. 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. On the WCFB the check ball is usually at the bottom of the pump well. Good quality print. 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. Adjust by bending float arms, making sure both pontoons on each float are the same height. 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. Use a brass drift punch. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Hold air horn upright with floats hanging. 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. Place the choke housing toward the left and remove upper right main body to throttle body screw. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). The metering rod adjustment should be done after the pump adjustment. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! Everyone Has Started an Engine in the . 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). 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. It's highlighted yellow and will look something like this. One of the butterflies is open about 1/8 with the carburetor dis assembled. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. Then close throttle. Any bubbles indicates a leak.Make sure the 2 floats are the same height. Hold a straight edge across top of dust cover housing, next to the pump arm. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. When removing valves they should be marked so that they get put back the same way. Two ports act as calibrated air bleeds. Float drop not set, or fuel pump pressure too low. 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 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. Once you get the piston out, clean, Carter WCFB Vacuum Piston the cylinder so that the piston move very free up and down. Enter Carb Number. Run a blunt object around the inside of the leather cup to make sure any coating is broken. Ideas?? Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Could the float bowl actually be the problem? Seat the discharge check by tapping lightly in the hole to form a good seal. During high speed operation a vacuum exists at the pump jets. I have repeated multiple times with same results. The carburetor will flood. Solid fuel has the 2 tubes pointing up. Fig. Both valves should be closed. Put some fluid in theaccelerator pumpwell and press down on the pump. 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. This box did not have a part number. 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. Is there a pointed check weight in the main discharge hole. Make sure the ball rattles. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. 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. 3: Holley 4150 idle mixture and speed adjustment screws. However, it is very similar and I found it very useful. Ultra-Sonic Cleaning3. Disassembly2. but if it runs well you don't really need to make any adjustments. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. One is in the secondary venturi and the other just above the throttle plate. The WCFB carburetor which came on some of the earliest 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 Technical Details. Check any vents to make sure they are open. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). 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. Can't find the answer you're looking for? Adjust by bending lip of float, not float arm. What more could you ask for? 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. The setups data is the same. Gasket removed as shown A. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. 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 . Back off the idle screw so that the throttle plates close completely. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. Adjust by bending the connector rod at the lower bend (E). 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. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. *New Main Body Gasket8. Back out throttle stop screw until throttle valves seat in bores. If hard starting still exists change the choke setting to one point lean. Adjusting the WCFB Metering Rods The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. Some have a coating to give it a better shelf life. 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. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. *New Float6. I. DISASSEMBLY. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. Clogged idle tube, or passages in the idle circuit. Can't find the answer you're looking for? Pulloffs : CUFWCFB2 $ 0 . Your friend will receive an email from you with a link to our site. See figure 9F-2. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Can't find the answer you're looking for? 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. 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. 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. If a loss of rpm is noted, or if the engine dies, and air leak exists. cm448. a. 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 flat surface of the pump arm should be parallel to the straight edge. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. 1956 Plymouth, Powerflite Transmission - Dashpot The dashpot has been eliminated. Coat threads of screw with sealing compound and install it. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. 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. Measure float height as illustrated above. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. Make sure the air horn contacts the inner wall of the bowl. This is an electronic rebuild manual, no physical copy will be provided. They sometimes need trimming. This check prevents excessive pressure in the discharge passage during acceleration. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Probably around 4- 4.5lbs. 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. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. Back out throttle lever set screw until throttle valves seat in bores of carburetor. Most of the single step rods were steel. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. The ends of the connector rod should point to the throttle arm side. Sometimes scraping around the edges with an awl will remove the staking. Note te larger box, and the number of additional tools from the 1935 set. Rotate throttle stop screw E until engine idle at approx 500 RPM. They are staked in the hole. Make sure the pontoons are centered and will not rub the bowl sides. Recheck float adjustments. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. If not, then find the check ball and make sure it is loose. Check the low speed jets to make sure they are clear (#44). Adjust by bending lip of float, not float arm. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Did the old gasket get removed? Add a couple drops of oil to the leather. Carburetors equipped with an adjustable bowl vent require adjustment. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). There should be a retainer keeping the check ball in place. Carter WCFB 4 Barrel Carburetor Float System. Be careful removing the intake check retainer. 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. William C. Carter was born in Union City Tennessee in 1884. They work fine when I push hard down on the piston. Place the choke housing toward the left and remove upper right main body to throttle body screw. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). Rotate throttle stop screw E until engine idle at approx 500 RPM. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. Outside top of early Carter tool box with correct decal. Coat threads of screw with sealing compound and install it. Product information . Test the needle by holding it down gently with a brass drift punch. Make sure there is a check needle below the main discharge. Aspringis inserted in the power piston hole, then the piston. Can't find the answer you're looking for? 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.

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