The setups data is the same. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Correct by removing any burrs or nicks. Disassembly2. Seat the intake check by tapping lightly in the hole to form a good seal. With throttle valves seated in bores, dust cover and gasket in place. Could the float bowl actually be the problem? 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. The ends of the connector rod should point to the throttle arm side. Check any vents to make sure they are open. BBS) and were basically an on/off condition similar to the function of a power valve. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. 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 (. Blowing out passages will not get them clean enough. Secondarys are somehow stuck open (which amounts to a vacuum leak). 2: Carter AFB idle mixture and speed adjustment screws. The correct way is to use a fuel pump pressure gauge. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. 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. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. 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. Seat the discharge check by tapping lightly in the hole to form a good seal. Hold a straight edge across top of dust cover housing, next to the pump arm. b. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. Adjust by bending float arms, making sure both pontoons on each float are the same height. *New Airhorn Gasket7. This restricts the flow of fuel. During high speed operation a vacuum exists at the pump jets. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. When I slow down to an idle, my engine runs rough. 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. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. Any pressure put on the needle will damage it. Probably around 4- 4.5lbs. 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. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. We will contact you as soon as this product is available. Can't find the answer you're looking for? Metering rods for the WCFB have been out of production for several years now. Carter WCFB, 4 barrel carburetor manual. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. Fig. 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. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. 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? Examine the viton tip for any marks.Fuel pump pressure could be too high. Make sure the air horn contacts the inner wall of the bowl. There should be a retainer keeping the check ball in place. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. Aspringis inserted in the power piston hole, then the piston. Back out throttle screw so that the throttle valve close completly. Float drop not set, or fuel pump pressure too low. 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 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. Change the choke setting to index. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. 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 Notice holes from which linkage rods are removed so they can Make sure the pump relief check is clean. Tyler's Forgotten Car Rescue 22,933 views. but if it runs well you don't really need to make any adjustments. 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. Note te larger box, and the number of additional tools from the 1935 set. One is in the secondary venturi and the other just above the throttle plate. Also make sure one isnt rubbing on the side. Enter Carb Number. 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. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. 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 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. One of the butterflies is open about 1/8 with the carburetor dis assembled. 60 pages of great info. The adjustment of the pump is important in order to get the required fuel. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Everyone Has Started an Engine in the . With mineral spirits in the float bowl, Raise the pump. 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. It needs about 4 lbs of pressure. Gasket removed as shown A. The well should fill with fluid. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. The discharge check is seated at this time to prevent air being drawn into the pump well. If not then clean it and try again. 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. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. When that is the case, I bend the accel. Watch on. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Piston force is too much for linkage. 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. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. The download link will expire in 30 days. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! The WCFB carburetor which came on some of the earliest Solid fuel has the 2 tubes pointing up. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Outside top of early Carter tool box with correct decal. The carburetor will flood. They work fine when I push hard down on the piston. This check prevents excessive pressure in the discharge passage during acceleration. Coat threads of screw with sealing compound and install it. 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 rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. Make sure the air cleaner gasket does not block the bowl vents. Is there a pointed check weight in the main discharge hole. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. 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. Adjust by bending the connector rod at the lower bend (E). Check throttle linkage to make sure that primary throttle valves come to full wide open position. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. Free shipping for many products! Low fuel pump pressure always check you motors manual for the correct pressure. 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. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn This eliminates any bog or hesitation when acceleration. Be careful removing the intake check retainer. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. To correct, remove carburetor and turn it upside down. Back out throttle lever set screw until throttle valves seat in bores of carburetor. Install the pump connector rod (D) in the outer hole, long stroke. When closing the throttle, the accelerator moves up in the pump well. Carter WCFB 4 Barrel Carburetor Float System. When removing valves they should be marked so that they get put back the same way. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. They sometimes need trimming. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. This allows air instead of fuel to be drawn off the pump jets. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. Be sure these ports are clear. Did the old gasket get removed? If hard starting still exists change the choke setting to one point lean. Product information . You cannot go wrong with Mikes carburetor in any way. Do not depress float lip against spring in needle, but let float rest of its own weight. Hold air horn upright with floats hanging. Recheck unloader settings with carburetor on the engine. 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). Adjust by bending throttle connector rod at upper angle (B). The accelerator pump circuit resides on the primary side of this carburetor. Each size must be used in its own location. The metering rod adjustment should be done after the pump adjustment. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. Run a blunt object around the inside of the leather cup to make sure any coating is broken. 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. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. The file is in PDF format, you can download and save/print a copy. Adjust by bending lip of float, not float arm. Quick test to see if the accelerator pump is working. When done you should see very little daylight around the valve. Test the floats in hot water and if you get any bubbles then they are leaking. 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 . Please complete the fields below to send your friend a link to this product. Adjusting the WCFB float level and float drop. Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). Check the low speed jets to make sure they are clear (#44). This is an electronic rebuild manual, no physical copy will be provided. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. Technical Details. Place the choke housing toward the left and remove upper right main body to throttle body screw. Some models have a pump relief check in the bottom of the fuel bowl. You need to run wire down all small passages. If not, then find the check ball and make sure it is loose. 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. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. 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). Share. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Adjust idle screws D to produce a smooth idle of correct speed is obtained. You may even have to resort to finding a used WCFB carburetor. 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. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. 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. Coat threads of screw with sealing compound and install it. Measure from center top surface of pontoons to air horn. Back off the idle screw so that the throttle plates close completely. Ultra-Sonic Cleaning3. Ethanol leaves deposits behind that acts like corrosion. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. cm448. DO NOT apply any pressure on the needle. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Make sure the ball rattles. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. Watch this. The mixture screw may be bent, or damaged. Recheck float adjustments. The accelerator pump circuit resides on the primary side of. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . I rebuilt a Carter WCFB carburetor with the lower auto choke setup. All These Part Numbers Interchange Into Our Part No. Fig. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. 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 piston is brass and can be damaged very easily. Sometimes scraping around the edges with an awl will remove the staking. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. If a loss of rpm is noted, or if the engine dies, and air leak exists.