How the Holley 847 Carburetor Works

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Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Purpose of the Carburetor The carburetor delivers a combustible mixture of fuel and air to the intake manifold of the engine. It automatically controls the amount of fuel … Continued

Carter AFB Metering Rods & Jets

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I get a lot of questions about the AFB and how the jets and metering rods are related, so here we go. The AFB, 4 barrel carburetor has 4 jets. Two matching primary and two matching secondaries. The Weber marine … Continued

Stromberg WW Throttle Body

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Stromberg WW carburetors are notorious  for having worn throttle shafts. Unfortunately unlike most carburetors, the WW wears out the shaft instead of the throttle body.  As I mentioned, most carburetors wear the throttle body and while not a simple process, … Continued

Holley 1931 Carburetor

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The Holley 1931 carburetor is a one barrel downflow type of carburetor. The carburetor is a one piece main body and throttle body casting. The 1969 model had limiter caps installed over the idle mixture screws so that they weren’t … Continued

Holley 1904 Carburetor

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The Holley 1904 is a 1 barrel, downdraft carburetor and has three basic parts, the main body, throttle body and the float bowl. The main body includes the metering block, float and the economizer. The float bowl mounts on the front of the … Continued

How to Test a Choke Pull-Off

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Basic Purpose – When the engine is cold the choke valve is fully closed (some may have a small gap). This allows the engine to get that extra fuel it needs to get going. When the engine starts vacuum is … Continued

Carter AFB Hesitation

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This question was recently asked by one of our customers. 1967 GTX, 4127s have been into this card 50 times. Can not get why the accel’ pump won’t work until half throttle. It seems it’s in the body. I have … Continued

Carter WCFB Vacuum Piston

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Carter WCFB Vacuum Piston. It isn’t unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Be careful when removing the top of the carburetor that you don’t force things and break the … Continued

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