BoonDocker YAMAHA: Non-turbo Control Box Apex - 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 07-18-07 Page 4 of 16
The fuel adjustment rpm ranges are blended as shown in the picture above. This allows for a broader range of adjustments
with fewer steps. Each fuel setting is centered at a particular rpm value, in this example: 3000, 5000, 6700, 7800, 8100rpm.
Each region is blended with the region below and the region above it as shown. The effect of the 3000rpm setting tapers
off as rpms increase towards the 5000rpm region, while the effect of the 5000rpm setting becomes greater. For example, if
the rpm is at 4000, the adjustment value will be half the value of the 3000 setting plus half the value of the 5000 setting.
The other regions work similar to this. If rpms continue above the highest rpm setting, fuel will continue to be adjusted at
the amount of the highest rpm fuel setting.
Fuel Screens (RPM Adjustments)
M1L

Id MD HI
3000 00 00 00
M1L This displays current map that is being used – in this case, M1 stands for Map1. Five possible fuel maps can
be used. Each map consists of all your configuration and fuel settings for a particular setup. The “L”
indicates that this map is Locked – this means the settings cannot be changed (the up/down buttons have no
effect). If 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
and unlock individual 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.
Id (3000 screen only) This adjustment is for Idle only (up to 2000rpm).
LO This adjustment is for Low load conditions. This will affect throttle settings from approximately 0 up to 1/3.
For rpm region 3000, this adjustment will affect idle. For other rpm regions, this will affect deceleration and
light-load cruising conditions.
MD This adjustment is for Medium (mid-range) load conditions. This will affect throttle settings from
approximately 1/3 up to 2/3.
HI This adjustment is for High load conditions. This will affect throttle settings from approximately 2/3 to full
open.
Note 1: Each number is equal to about 1/2% of the total available fuel. The maximum available fuel will vary with each
engine as well as with elevation and air temperature.
Note 2: It is possible to max the injector (duty cycle > 100%) before the adjustment setting is maxed (127)! Pay careful
attention to EGT’s, O2 readings, and fuel pressure when running with engine mods that require a lot of additional fuel!