Abstract: A carburetor main body assembly for an engine has a main body. The main body has a single body passage and a single throttle plate. The single body passage has a single intake port and a single discharge port. The single intake port is connected to the single discharge port. The single discharge port is connected to a plenum of the engine. The single throttle plate is disposed within the single body passage. The throttle plate is operable to regulate airflow through the single body passage. The main body further has a first section to supply fuel to the engine and a second section to supply fuel to the engine. The first section is independent in operation from the second section. The first section is a first quadrant. The second section is a second quadrant.

Abstract: A single body passage (single venturi) carburetor main body design that offers improved control of the fuel delivery on both the opposing and opposite sides of the carburetors single venturi, this to offer true quadrant tuning of all aspects of fuel delivery in the designs single passage opening. The carburetor main body design may incorporate, a throttle plate(s), a main body assembly, boosters that are associated with a main fuel delivery circuit, idle fuel delivery passages, transfer circuit delivery passages, air venting passages, bowl venting passages and accelerator pump passages. Each can be constructed to offer the design the capability of individually controlling the fuel delivery of both the main, the idle and the transfer circuits to each quadrant of the single venturi design. This is something that previous designs have not offered.