Haltech E6GMX - Manual (Page 45)

E6GMX Manual
45
4.5 The Haltech Maps
The Maps that the ECU uses to calculate fuel and ignition requirements are explained in detail
here.
4.5.1 Fuel Map – 3-Dimensional
The fuel map is accessed through the menu structure under the maps menu or using the hot-
keys CTRL-F (2D) or CTRL-ALT-F (3D).
The Base fuel map represents the reference on which all fuel corrections are made to calculate
the final fuel requirement for the given engine load and engine speed. This map should
closely reflect the engines fuel requirements at optimum operating temperature and average
operating and environmental conditions. This map is where the most tuning is carried out.
The fuel map comprises a series of 2-dimesional maps of fuel quantity versus engine load
across the range of engine speed. If the “RPM Mode” in the main set-up page is set to 10500
there are 22 engine speed ranges in the fuel map from 0rpm in 500rpm increments, if it is set
to 16000 there are 17 engine speed ranges from 0rpm in 1000rpm increments. Each range has
32 bars distributed across load and each bar represents the quantity of fuel that is to be
injected prior to any corrections. For any given load and rpm the range for the injection time
is 0ms to 16ms.
4.5.2 Ignition Map – 3-Dimensional
The ignition map is accessed through the menu structure under the maps menu or using the
hot-keys CTRL-I (2D) or CTRL-ALT-I (3D).
The Base ignition map represents the reference on which all ignition corrections are made to
calculate the final ignition timing requirement for the given engine load and engine speed.
This map should closely reflect the engines ignition timing requirements at optimum
operating temperature and average operating and environmental conditions. This map is
where the most tuning is carried out.
The ignition map comprises a series of 2-dimesional maps of ignition timing versus engine
load across the range of engine speed. If the “RPM Mode” in the main set-up page is set to
10500 there are 22 engine speed ranges in the ignition map from 0rpm in 500rpm increments,
if it is set to 16000 there are 17 engine speed ranges from 0rpm in 1000rpm increments. Each
range has 32 bars distributed across load and each bar represents the ignition timing that is to
be used prior to any corrections. For the given load and rpm the range for the ignition position
is 0°BTDC to 50°BTDC.
4.5.3 Fuel Correction Map
The following is an explanation of maps that are used to correct the base fuel quantity based
on the environmental conditions.