What do high-pressure and low pressure mean?
High pressure fuel injectors usually require about 40 PSI fuel pressure. The low-pressure fuel injectors used on most throttle body injection systems usually require about 12 to 15 PSI fuel pressure. Carburetors use 2 to 6 PSI fuel pressure. The Black Hawk Engineering fuel injection systems use the more widely available high pressure fuel injectors mounted on throttle bodies.
