Zenith NDIX 2-Barrel: Operation: Transition

Just above the throttle valve there are additional orifices which deliver fuel when the throttle valve is opened. This provides a smooth transition from the idling to the main jet circuit.

Fig 1: Zenith 32 NDIX 2-barrel Carburetor

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 2: Full Throttle Operation

Courtesy of PORSCHE CARS NORTH AMERICA, INC.