G4 Wiring and Installation Manual32
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This mode should be used if each cylinder has it’s own injector providing the following
criteria are met:
1. There must be one Injector Drive for each cylinder.
2. There must be sufficient triggering for the ECU to calculate the current engine
position in the 720 degree engine cycle. This means that a second trigger sensor is
required for synchronisation and this must use an appropriate trigger wheel driven off
of the camshaft (or driven at half the crankshaft’s angular speed).
In this mode each injector must be correctly wired to its own injector drive so that the injector
can be fired. The timing at which the injectors fire is configurable within PCLink Tuning
Software.
The firing order of the engine is NOT important at the wiring stage as the firing order will be
entered into the ECU via PCLink Tuning Software. Wire each cylinder to its corresponding
injector drive number (wire cylinder 1 injector to injector drive 1, 2 to 2, 3 to 3 etc...).
Set the 'Injection Mode' to 'Sequential' when using this configuration.
Staged Injection
This mode allows the use of staged injection where the engine uses primary injectors that
operate at all times and secondary injectors that only operate at high load/rpm. This
arrangement is useful in applications with very high fuel delivery requirements that would
normally require extremely large injectors. Very large injectors make tuning difficult at low
loads (idle and low power operation). With staged injection one smaller set of injectors
operates at low load giving more precise control. At higher loads both sets of injectors
become active to supply the required fuelling needs.
Group Fire Staged Injection
This mode must be used for staged injection if the criteria required for sequential injection
are not met. In this mode the number of injection drives used can be specified using the
'Active Drives' setting. Irrespective of the number of injection drives used, wire the primary
injectors to odd numbered Injector Drives (Inj1, Inj3, Inj5, Inj7), wire the secondary injectors
to even numbered Injector Drives (Inj2, Inj4, Inj6, Inj8). In this mode all primary injector
drives are fired at the same time (group fire) and all secondary injector drives are fired at the
same time (group fire). Set the 'Injection Mode' to 'Group/Staged' when using this
configuration.
Sequential Staged Injection (Xtreme only)
This mode can be used to provide full sequential injection on both the primary and
secondary injectors. This mode requires that the engine have sufficient triggering to
calculate crankshaft position and the position in the firing order (i.e. a sync signal is
required).
Inj 1 = Pri 1
Inj 2 = Pri 2
Inj 3 = Sec 1
Inj 4 = Sec 2
Inj 1 = Pri 1
Inj 2 = Pri 2
Inj 3 = Pri 3
Inj 4 = Sec 1
Inj 5 = Sec 2
Inj 6 = Sec 3
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