The carburetor idle system controls the fuel/air mixtures from the car idle setting up to approximately 30mph. As shown in the image, the fuel first passes through the centrally located main metering jets “A” to the idle tubes “B” in the bowl, each of which have calibrated orifices. These orifices control the amount of solid fuel metered by the idle system. At the junction of the cover and bowl, air mixes with the solid fuel through two calibrated air bleeds “C”. This fuel/air mixture then passes horizontally through a cored passage in the cover; additional air is also metered by the idle channel bleed “D”. The mixture continues to follow the path of suction downward through the idle passages in the housing to the throttle body where it is metered to the engine by the idle adjusting screws, and the secondary and top idle holes “E” as they are exposed to manifold suction by the opening of the throttle valves “F”.