Re: Carburetor WCFB 4-Barrel
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Posted on: Today 1:12
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Re: Carburetor WCFB 4-Barrel
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Probably you are already aware, but the pair of butterfly valves only work in tandem when the choke is all the way open. Before that point, only the one set will open, except at full throttle an "unloader" cam will open the second set partway so that you can air out a flooded engine by flooring it while cranking. So I like to check operation by confirming the unloader works with the choke closed, then I push open the choke and confirm the tandem operation. Of course, the exact values for the gaps that things have in various states are shown in the instruction sheet and service manual. But if the second set was not connected at all, then you basically had a 2 barrel carb with this unloading functionality disabled in addition.
Posted on: Today 1:22
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1955 400 | Registry | Project Blog
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Re: Carburetor WCFB 4-Barrel
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The screw was quite loose, to the point I'm lucky I didn't lose it. Just to satisfy my curiosity I should have played around with it a bit when the screw was loose to see if the secondary butterflies were actually working or not, but I just tightened up the screw because things gotta be fixed! ![]() Once I did tighten up the screw I checked and everything is operating as it should. The linkages and shafts are all in nice condition, very little wear. ![]()
Posted on: Today 9:57
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Re: Carburetor WCFB 4-Barrel
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Are these little spots for oil?
Is the little cavity in the cover maybe supposed to have a felt for oil? ![]() ![]()
Posted on: Today 16:55
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Re: Carburetor WCFB 4-Barrel
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53 Cavalier
My experience with Carter carburetors is if there is a drilled, or drilled and tapped, hole that intersects a shaft, then that hole is the preferred location to apply shaft lubrication/oil. For an equivalent shaft the WDO dust cover has oiling instructions cast into the cover. The holes in the WDO do not have felt inserts, so I would not expect to see them in a WCFB. I other worlds lubricating the carburetor throttle shaft is on the 500 mile maintenance schedule. Bye the way, and just as a reminder, the float level for Daytona float valve equipped carburetors is adjusted by adding/subtracting gaskets between the valve body and the carburetor casting. The tang on the float should touch the center of the Daytona valve. dp
Posted on: Today 18:26
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