BoonDocker SKI-DOO: Non-turbo Control Box SDI 600/1000 4 INJ User Manual
Page 9
BoonDocker – 2379 Heyrend Way Idaho Falls, Idaho 83402 – 208-542-4411 / 877-522-7805
www.boondockers.com – email:
– fax: 208-524-7381
Revised 11-07-07
Page 9 of 16
N2O Menu in “Capture” mode:
Fuel TPS RPM Btn
040 OFF OFF
CAP
5. The nitrous handlebar button can be used to add or subtract a preset amount of fuel for interactive tuning purposes
(see nitrous configuration section below). From the Main Menu, select N2O, set RPM and TPS to OFF, set Btn
to TUN and adjust the fuel number as desired for the test (see example menu screen below). When the nitrous
button is pressed, this amount of fuel will be added or subtracted immediately from the current settings for all
rpms and all loads.
N2O Menu in “TUNE” mode:
Fuel TPS RPM Btn
040 OFF OFF
TUN
Also consider the following:
A/F Mixture Generally EGT’s get hotter as the motor gets lean, but too lean and the temps can actually drop! It’s like
turning the oxygen up too high on a torch – as oxygen is added, the flame gets hotter to a certain point,
then gradually cools off until it becomes extinguished from too much oxygen.
Detonation
Detonation often requires an experienced tuner to detect – in most instances it cannot be heard or
noticed. Careful examination of the piston and sparkplug are required. Watch for melted sparkplug
electrodes, speckling on the sparkplug insulator, or shiny or gray flakes on the electrode which could be
melted aluminum from the piston. If possible, watch the crown of the piston (near exhaust port) for a
pitted or sand-blasted look. EGT’s can sometimes read low during detonation – heat is going into the
cylinder and piston instead of out the pipe.
Timing
Timing can affect the pipe temperature. Generally if the ignition is retarded, more heat will build up in
the pipe. Too much advance may drop EGT temps, but increase cylinder temps.
Fuel
Different fuels have different densities and other characteristics which can affect your mixture and fuel
requirements. Oxygenated fuel will run leaner. Octane rating is important for highly modified motors.
Lean spots
Sometimes a motor runs hot at certain rpms and throttle positions (usually in its mid-range) no matter
what. The fuel adjustment settings can be used to richen this up, but the engine may quickly become
too rich and run erratic. Under light load conditions you can sometimes get away with running hot for
short periods of time. Under such conditions it is best to vary the throttle position often and not stay at
one throttle setting for long durations.
VI. Nitrous Tuning (for optional Boondocker Nitrous kit)
Important Tuning Note: Be sure to make non-nitrous (RPM-based) tuning adjustments first. Once the nitrous tuning
procedure has been done, any changes to the RPM fuel settings may affect nitrous fuel delivery. If this occurs, the nitrous
tuning steps will need to be done again.
On the startup screen (displayed when first powered on), note the message in the lower right-hand corner.
ADJ
– Configured for a nitrous system using an Adjustable or Fixed N2O pressure regulator.
FIX
– Configured for a nitrous system using a Fixed N2O pressure regulator.
NON
– Configured for a nitrous system that is Non-regulated.
Be sure that this description matches your actual nitrous system. Some internal settings and some user menus and settings
are affected by this configuration. Do not attempt to run a Non-regulated nitrous setup with the Control Box in ADJ
mode or a Regulated nitrous setup in NON mode! Go to the SetUp menu (under the MAP Menu) to change this
setting. If you do not have nitrous capability, then this configuration does not matter.