Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 60)

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 53
At a given voltage, the minimum pulse width required to open an injector will vary based on injector
size, injector type and manufacturer. This input screen allows the user the ability to fine tune flow
rates (injector opening time) based on battery voltage.
23. Injector Phase Angle
Injector Phase Angle setting allows the ECU to “time” the fuel delivery relative to the intake valve
opening!
Note: The main wire harness cam connector (cam sync) must be hooked up for the injector
Phase Angle and Individual cylinder spark control functions to work.
To calculate the actual Start of Injection (SOI), use the following formula:
SOI = Injector Phase Table Value (from Injector Phase Table below) – Crank Reference Value
(
Crank_Trigger_Configuration ) = Injection Point (point where injector will begin introducing fuel).
The major benefit of this feature is realized when using high flow injectors with a smaller duty cycle.
Note: The RPM values, at the bottom of the table, are from the Load vs. RPM Axis drop down
accessible from the Configuration tab from the Main Menu screen.
Same screen print as is shown above with window maximized.