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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Home away from home
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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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Re: Carburetor WCFB 4-Barrel
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Home away from home
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Quote:
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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