Patent ID: 6851663

Claim:
A method for increasing the performance of a carburetor, the carburetor including a throat for containing a stream of air passing through the carburetor, a single fixed location venturi in the throat of the carburetor, the venturi defining the smallest inside diameter of the throat of the carburetor, a single throttle plate carried in the throat of the carburetor, and a single fuel supply port at a fixed location above the throttle plate for supplying fuel to the airstream passing through the throat of the carburetor, the method comprising the acts of: locating the fuel supply port in the throat of the carburetor at a fixed location below the fixed location of the venturi and above the throttle plate; forming a plurality of carburetor inserts, each carburetor insert having a venturi on an inner surface of the insert, the carburetor inserts of different physical characteristics, at least one characteristic being the location of the venturi in the throat of the carburetor; and selecting one of the carburetor mains to optimize the placement of the venturi relative to a booster in the throat of the carburetor for increased performance.