Tips and Technical (BBD)

1956 Plymouth V-8 Model P-29 BBD Dual Down Draft w/Automatic Choke, Carburetor Numbers: 2299S, 2300S, 2301S, 2299S – Standard Transmission...

Adjustments – Air Bled Design Float Setting Invert casting and hold finger against float fulcrum pin retainer to assure fulcrum...

Bowl Vent AdjustmentWhen no pin position wire is available, use some wire tightly wrapped around the stem.

Remove float to adjust. To obtain proper alignment it may be necessary to bend float lip at either or both...

When the throttle is pressed, the engine will get the extra fuel it needs via the accelerator pump circuit. This...

The model BBD is a BB design, dual carburetor with low overall height. Accessible adjustments and removable subassemblies. It has...

Idle By-Pass Assist Some BBD units incorporate an idle by-pass assist. This passage goes through the main body, and the...

Fast Idle and Unloader During the warm-up period, it is necessary to provide a fast idle speed to prevent engine...