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Super Precision CNC Weber Venturies, 50mm Carb With 43mm Venturies, For Porsche®, 1966-1969

The Venturies are the small opening in the top of the carburetor that delivers the vacuum signal to the main air jets for the carburetor to work. Replacing the Venturies in the carburetor will give your Porsche an excellent throttle response along with a smooth idle. Venturies sizes are determined by engine displacement, camshaft profile and the operating range of the engine.

Sold in a set of 6

Below is a recommendation chart. Variations are made for different operating conditions, engine configurations and gear ratios.

Engine	Cams	Carbs	Venturies
2.0 to 2.2	"S"	40mm Webers	32mm
2.4 to 2.7	"S"	40mm Webers	34mm or 36mm
2.8	"S"	40mm Webers	36mm
2.8	RSR	46mm Webers	38mm or 42mm
3.0	"S"	40mm Webers	36mm
3.0 RSR	RSR	46mm Webers	42mm
3.2	"S"	46mm Webers	38mm
3.5	"S"	46mm Webers	42mm
3.5 RSR	RSR	46mm Webers	42mm
3.5	GE60 or 120/104	46mm Webers	42mm
3.8	GE80	50mm PMO’s	46mm venturies (Or larger)