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The Landing School
EFI - Electronic Fuel Injection
EFI is a pressurised, indirect-injection system with solenoid-operated injectors. In multi-point injection, one injector is in each intake manifold runner. Single-point injection uses one or two injectors in a carburetor-like throttle-body. (from the site)
The Venturi Effect
The Venturi effect is the phenomenon that occurs when a fluid that is flowing through a pipe is forced through a narrow section, resulting in a pressure decrease and a velocity increase. (from the site)