Carter BBD 2-Barrel: Description: Notes

Two barrel downdraft type with non-adjustable vacuum controlled step-up rods in metering jets. A Venturi Cluster or main nozzle assembly is used which includes secondary venturi, main nozzles, main vent tubes, and idle tubes as an assembly (attaching screws are hollow with calibrated restriction and serve as Idle Air Bleeds). These carburetors have various design differences and different adjustments as follows: