Always have a good electrical ground connection.
Poor ground will result in erratic operation of
controller or damage. Make sure boost connection
is POST throttle body.
Tuning the Stage 3 System
The Stage 3 system allows for a large range of tuning on any EFI or
forced induction vehicle. It can reference fuel injector pulse-width, boost,
or both simultaneously. The boost and EFI data are displayed on the
LCD screen, along with the systems output as a percentage of pump
capability.
All functions of the controller are accessed using the two push buttons to
the left and right of the LCD screen. Pressing button 1 will scroll between
screens, while pressing button 2 will affect whatever setting is on the
screen.
Display Screens:
Screen 1
This is a display only screen. It displays boost, fuel injector pulse-width
(PW), and injection as independent bar graphs.
Screen 2
This display screen shows boost in psi and injector pulse-width (PW) as
a percentage.
Screen 3
This screen displays boost in psi, while pulse-width (PW) and injection
are shown as a percentage.
Screen 4
This screen displays boost in psi and pulse-width (PW) as a percentage.
B P
INJ
Boost PSI
EFI Pulse %
PSI %PW
PSI
PW
Controller Set up Screens:
Use button 2 to change settings on each set up screen.
Screen 5
This is the first setup screen. It allows you to select BOOST, EFI, or
BOTH, using button number two. If BOOST is selected, then boost alone
will determine the injection volume from the nozzle. If EFI is selected,
then fuel injector pulse-width (PW) alone will determine injection volume.
If BOTH is selected then both inputs will be used simultaneously to
control injection.
Screen 6A
EFI START INCREASE
This screen sets the injector PW point when injection will start through
the nozzle. Typical start points are in the 35% range.
Screen 6B
EFI START DECREASE
This screen sets the injector PW when injection will start through the
nozzle.
Screen 6C
EFI FULL INCREASE
This screen sets the fuel injector PW full point when maximum injection
through the nozzle will be reached. Typical EFI full points are 60-80%.
Screen 6D
EFI FULL DECREASE
This screen sets the fuel injector PW full point when maximum injection
through the nozzle will be reached.
Control = Both
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