Effect of Venturi Size on Engine Power

Effect of Venturi Size on Engine Power Points : Effect of Venturi Size on Engine Power A venture produces sufficient suction to pull fuel out of the main discharge tube. Vacuum is highest inside the venture. The narrowed airway increases air velocity forming a low-pressure area in the air horn. The main discharge tube uses venture vacuum to fee duel into the air horn and engine. Also called MAIN FUEL NOZZLE, it is a passage in the carburetor body that connects the fuel bowl to the center of the venture.