BoonDocker ARCTIC CAT: HIJACKER 2.0 - Manual (Page 8)

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Tuning tips:
Important: Find the settings where your motor runs rich before you decide to go lean!
1. Tune with the engine and pipe at operating temperature. The sled’s ECU will make adjustments as the engine warms up – you
might think the engine needs leaner settings then later realize you are too lean once the engine warms up.
2. One method for finding out where a fuel adjustment setting is effective, greatly increase only that setting. Run the engine to
find out when it suddenly becomes too rich – this is where that setting is effective. Be careful – you can easily flood the motor,
especially with LO load or low rpm settings. If this happens, to restart the engine you may have to crank awhile with the throttle
held wide open.
3. To help isolate a problem spot, the Stats Capture feature can be used to determine RPM, and whether the load setting is LO,
MD, or HI. The button can be configured to capture these stats. From the Main Menu, select Set, set Btn to CAP. Whenever the
button is pressed, the Stats: Capture screen will be displayed. The current stats will be captured when the button is released.
4. The handlebar button can be used to add or subtract a preset amount of fuel for interactive tuning purposes. From the Main
Menu, select Set, 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 button is pressed, this amount of fuel will be added or subtracted immediately from the current set-
tings for all RPMs and all loads.
Also consider the following:
A/F Mixture Generally EGT’s get hotter as the motor gets lean, but too lean and the temperatures 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 insula-
tor, 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. The 1100 Turbo has a detonation sensor. Watch for and pay close attention
to error codes.
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 mixture and fuel requirements. Oxygen-
ated fuel will run leaner. Octane rating is important for turbos, and especially when the HP setting is turned up from stock.
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 erratically. 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.
Returned Goods – No merchandise will be accepted without prior approval. A RMA number (Return Merchandise Authorization)
provided by Boondocker is required before a return will be accepted. A 20% handling and restocking charge will be applied to
returned merchandise. No unauthorized returns will be accepted.
Limited Warranty – Boondocker warrants its product to the original purchaser against workmanship defects for a period of 90
days, commencing from the date of product delivery to the Consumer.
Maximum Liability – The maximum liability of Boondocker in connection with this warranty shall not under any circumstances
exceed the price of the product claimed to be defective.
EFI TUNING SUGGESTIONS - continued
WARRANTY TERMS AND CONDITIONS
Setup Menu for “Capture” Mode Capture Screen
Setup Menu for “Tune” Mode