Nitrous Express Water Methanol Stage 3 - Manual (Page 8)

For Naturally Aspirated motors:
The injection START point should be approximately 5% higher than your cruising Fuel Injector Pulse Width
(PW).
The injection FULL point should be approximately 5% lower than your Wide Open Throttle (WOT) PW.
For Turbo/Supercharged Applications:
The injection START point should be approximately 3-5PSI higher than your cruising or ¼ throttle boost.
The injection FULL point should be at MAX boost pressure.
EXAMPLE:
Cruising P/W: 18% +5% _23%_
WOT P/W: _52%_ -5% _47%_
Cruising-1/4 throttle Boost (PSI) 2PSI . +3 to 5PSI 5 to 7PSI .
MAX Boost (PSI) 18PSI . -3PSI 15PSI .
Tuning Notes:
Cruising P/W: _____ + 5% _____
WOT P/W:_____ -5% _____
Cruising-1/4 throttle Boost (PSI):_____ +3 to 5 PSI _____
Max Boost (PSI):_____ -3 to 5PSI _____
For small Turbos and fast reacting Super Chargers which are also injecting based on Fuel Injector Pulse width
you will need to have injection based more on P/W than PSI settings for the controller to inject properly.
Under moderately heavy throttle, boost will trigger a small amount of injection for cooling and effi ciency. As
more boost builds under higher throttle positions, the system will add more injection. In the event that boost
reaches higher levels (such as in a race or in a WOT situation on the street) the system will inject very aggres-
sively for maximum octane gain and cooling.
Note that in all of the above examples, all of the data needed in terms of PW and boost can be obtained through
the controller display itself. Simply driving under cruising conditions and trying various levels of throttle and
boost will allow the user to determine good set points for injection.
Other controller features:
The controller can be put into a “read-only mode” for the purpose of viewing boost and EFI data without in-
jection. To toggle this mode on and off, press and hold button 2 in any display screen. While holding button 2
down, press and hold button 1. After 1 second, release both buttons. The controller will give no indication that it
is in read only mode except for the fact that it will not inject under any circumstances.