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There is a calculator to work out injector size -
Stick to 80% duty for reliability on racetrack (to prevent overheating of injectors). If stick to 80% duty, 383cc is about right for 350hp engine.
Fuelpump calculator -
Higher fuelpressure is needed to match boost level. 1psi of rail pressure = 1psi of boost pressure (1:1). Factory engine is around 7psi stock, and stock FPR raises fuel pressure 7.1psi (up from 35.5psi at idle). Some aftermarket FPR's are rated to 100psi.
If add a bigger lph aftermarket fuelpump, the small orifice on stock FPR makes fuelpressure rise into low 40's, up from 35.5psi.
Stick to 80% duty for reliability on racetrack (to prevent overheating of injectors). If stick to 80% duty, 383cc is about right for 350hp engine.
Fuelpump calculator -
Higher fuelpressure is needed to match boost level. 1psi of rail pressure = 1psi of boost pressure (1:1). Factory engine is around 7psi stock, and stock FPR raises fuel pressure 7.1psi (up from 35.5psi at idle). Some aftermarket FPR's are rated to 100psi.
If add a bigger lph aftermarket fuelpump, the small orifice on stock FPR makes fuelpressure rise into low 40's, up from 35.5psi.
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