What is pressure type carburetor?
A pressure carburetor is a type of fuel metering system manufactured by the Bendix Corporation for piston aircraft engines, starting in the 1940s. It is recognized as an early type of throttle-body fuel injection and was developed to prevent fuel starvation during inverted flight.
What is the difference between float-type and pressure type carburetor?
Pressure injection carburetors are distinctly different from float-type carburetors as they do not incorporate a vented float chamber or suction pickup from a discharge nozzle located in the venturi tube. Instead, they provide a pressurized fuel system that is closed from the engine fuel pump to the discharge nozzle.
What are the types of carburetor?
There are two types of carburetors:
- Fixed venturi – The velocity of the airflow is used to regulate the flow of the fuel.
- Variable venturi – The flow of raw fuel is controlled mechanically, and airflow is regulated with fuel flow.
What are the advantages of the pressure type carburetor?
A pressure-type carburetor discharges fuel into the airstream at a pressure well above atmospheric pressure. This results in better vaporization and permits the discharge of fuel into the airstream on the engine side of the throttle valve.
What are the disadvantages of the float carburetor?
The float-type carburetor has several distinct disadvantages. First, they do not function well during abrupt maneuvers. Secondly, the discharge of fuel at low pressure leads to incomplete vaporization and difficulty in discharging fuel into some types of supercharged systems.
What are the disadvantages of a float type carburetor?
The chief disadvantage of the float carburetor, however, is its icing tendency. Since the float carburetor must discharge fuel at a point of low pressure, the discharge nozzle must be located at the venturi throat, and the throttle valve must be on the engine side of the discharge nozzle.
How much HP can a 750 carb support?
As an example, a 750-cfm carb on one of my street/strip Chevy 383 small-blocks can make more than 600 streetable hp, whereas an engine less well spec’d may only make 540 to 550.