BoonDocker POLARIS: Non-turbo Control Box 900 IQ - Manual (Page 4)

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 4 of 16
3. Fuel Adjust Menus
This selection is used to make fuel adjustments. There are up to seven Fuel adjust screens (examples shown below). Fuel
screen1 will be displayed after moving the cursor to the Fuel selection on the Main Menu and pressing the “SEL” button.
Go to the next screen by pressing the “SEL” button. After pressing the “SEL” on the last Fuel adjust screen, you will
return to the Main Menu. Use the Left/Right Arrow keys to switch between settings. Use the Up/Down Arrow keys to
change the setting values. Sample Fuel adjust screens are shown below (actual rpm settings and number of screens may be
different for your model).
Fuel screen1: M1L LO MD N2 DL
3000 00 00 00 00
Fuel screen2: M1L LO MD HI tr
5000 00 00 00 00
Fuel screen3: M1L LO MD HI tr
6700 00 00 00 00
Fuel screen4: M1L LO MD HI tr
7800 00 00 00 00
Fuel screen5:
M1L LO MD HI tr
8100 00 00 00 00
Fuel screen6:
M1L AM DR Sens
ACEL 00 00 00
The control box allows fuel adjustments to be made according to the following two factors: RPM and Engine Load.
RPM Regions:
Up to seven RPM regions are pre-programmed in the control box which allows fuel adjustments to be made at specific
RPM settings. Whenever the engine RPMs are between these specific regions, the fuel adjustment will be the result of
the adjacent RPM fuel settings blended together. For example, the fuel setting at 5000 RPM is centered at 5000 RPM,
but this value also has an effect on fuel whenever RPMs are above 3000 RPM and below 6700 RPM (the two adjacent
settings for this example). Suppose the 3000 fuel setting is at “4” and the 5000 fuel setting is at “8”, so if engine rpms
are at 4000 the actual fuel adjustment made will be ½ of “4” and ½ of “8” which is “6”.
Load Ranges:
Each RPM Region is split into 3 load ranges: LO (low), MD (medium), HI (high). Each load range is roughly equivalent
to the throttle position divided into thirds: LO is closed throttle (idel) to 1/3 open, MD is 1/3 to 2/3 open, and HI is 2/3 to
full open. During light-throttle conditions (slow cruising or deceleration), the LO RPM settings will be used. During
part-throttle conditions (normal or faster cruising), the MD RPM settings will be mostly used. During heavy-throttle
conditions (accelerating or heavy load operation), the HI RPM settings will be used.
3.1
Fuel Screens (RPM Adjustments) M1L

LO MD HI tr
3000 00 00 00 00
Below is a description for each field show in the above sample screen:
M1L This displays current map that is being used – in this case, M1 stands for Map1, and L indicates the map is
Locked (changes are not allowed). Five possible fuel maps can be used. Each map consists of all the fuel
settings for a particular setup. If the map is Locked, the settings cannot be changed and the up/down buttons
have no effect. If U is displayed, the map is Unlocked, adjustments can be made to any setting and these
changes will be automatically saved to the selected map. Refer to the Load/Copy sections for more details about
how to Lock, Unlock, Load, and Copy different Maps.
3000 This is the RPM Region for the fuel adjustments on this screen. For this example, this screen’s adjustments will
be centered at 3000rpm. There can be from 3 to as many as 7 rpm regions depending on the program version.
The effect of the 3000rpm setting tapers off until 5000rpm, while the effect of the 5000rpm setting ramps up as
rpms go towards 5000. The other regions work similar to this.
LO / MD / HI These are the engine Load settings for each RPM region. Since engine load is directly related to
throttle position, each load range is equivalent to the following approximate throttle positions:
LO = 0 up to 1/3 throttle
MD = 1/2 up to 2/3 throttle
HI = 2/3 up to full throttle