BoonDocker SKI-DOO: Non-turbo Control Box SDI 600/1000 4 INJ - Manual (Page 10)

BoonDocker – 2379 Heyrend Way Idaho Falls, Idaho 83402 – 208-542-4411 / 877-522-7805
www.boondockers.com – email: [email protected] – fax: 208-524-7381
Revised 11-07-07 Page 10 of 16
The fuel adjustment setting in the N2O menu is used to control how much fuel is added during nitrous use. The nitrous
pressure transducer input is used to automatically scale the fuel adjustment up or down from this base setting according to
nitrous pressure. However, you still must go through the nitrous tuning procedure before you can safely use nitrous.
Warning: Only adjust the control Box settings according to the steps below. The best way to tune an engine is
with the use of an oxygen sensor and gauge (available from Boondocker). This adjustment process should only
be performed by an experienced tuner. If you are not an experienced tuner, find someone who is. Remember,
safety first!
The steps below should be performed with a full nitrous bottle. On systems without a nitrous pressure regulator, make sure
the bottle is at proper operating temperature (70-90deg F) and pressure (700-1000psi). Make sure the engine is at normal
operating temperature.
*** Do not exceed 2 seconds of nitrous use until the fuel adjustment is complete and correct! ***
1. First configure the nitrous system for Button use. The next chapter will describe different ways to configure your
system for nitrous activation, but we’re going to shortcut that for now.
Select N2O from the Main Menu, move the cursor so it is under Btn and press the Up Arrow until N2O. Press
“SEL” to return you to the Main Menu. Select N2O from the Main Menu again. Look at the N2O Menu to be
sure that TPS and RPM are turned OFF.
N2O Menu for Button Activation for initial Nitrous Tuning:
Fuel TPS RPM Btn

040 OFF OFF N2O
2. Follow this step only if you have an adjustable N2O pressure regulator: Select N2O from the Main Menu. With
the cursor under Fuel, when you press the up, down, or “SEL” key, the following menu appears:
340 180psi FDly

050 025 000
The 340 and 180 fuel settings are
used to create a Fuel Adjustment
Line (see graph) which allows
nitrous fuel to be automatically
adjusted according to N2O
pressure. Raising or lowering
either of these values will change
the slope of the line.
Description of N2O Fuel Screen for ADJ regulator:
340 050
High N2O pressure fuel setting (fuel adjustment is centered at 340psi)
180 025
Low N2O pressure fuel setting (fuel adjustment is centered at 180psi)
Adjust the low pressure (180psi) Fuel setting first. Set your regulator pressure to 180psi +/-20psi (approximately
1 3/4 turns out on the adjustable regulator knob). The actual N2O pressure will be displayed after nitrous has
been activated in the upper right of this screen (displayed as “200” on the screen above).
Increase the low pressure (180) nitrous Fuel adjustment on the Control Box (displayed as “020” on the screen
above) until you notice a drop in the power increase when using nitrous. Oxygen, EGT, and rpm readings can be
used to help determine when you are too rich. Be sure you have reached this point before proceeding to the next
step. Note this adjustment setting.
3. Follow this step only if you have a Fixed N2O pressure regulator or a Non-regulated system: Select N2O from
the Main Menu.
Fuel TPS RPM Btn

050 OFF OFF N2O
Select Fuel. The following screen will appear:
N2OFuel F-Delay

050 000
N2O Pressure/PSI
N2O Fuel Adjustment Line is determined by
the 180 and 340 fuel settings
50
25
180 340
Fuel
Adjust