Haltech E8 - Manual (Page 80)

Haltech E11/E8 Instruction Manual
Halwin 2D Maps
There are other tables in the ECU, such as those used for temperature corrections. They are indexed by
only one parameter, and so are not divided into ranges. These tables are also called maps. An example of
this is the 3D coolant temperature map as shown below.
Figure 85 - 2D Temperature Correction Map
Fuel Maps
The E11 ECU has two base fuel maps from which the injection is calculated (fuel map 1 and fuel map 2).
These maps contain the base injection time for the given load and RPM at which the engine is operating.
The base fuel map has the greatest influence on the air/fuel (A/F) mixtures. The base map that is used
can be selected from the Main Setup page. The selection can also be made from an auxiliary input. See
auxilary inputs section for details on setting up dual mapping using an auxiliary input.
Tuning Your Base Maps
To tune your base fuel map:
Setup your A/F ratio measuring equipment to measure the A/F for the engine that is to be tuned.
Check which base fuel map is used and select the appropriate map in the front-end software to tune.
Ensure that all correction maps such as coolant temp and air temp corrections are turned off or set to zero
correction at this stage.
Confirm base timing is correct with timing light (for more information see setup guide section of manual).
Ensure that the ignition timing is set conservatively to ensure that it does not ping if a momentary lean
condition is experienced.
Page: 80 Copyright © Haltech 2008
WARNING
Driving a vehicle over time, on poorly tuned maps can lead to engine damage
over that period. In order to ensure that your fuel maps are correct, a wide-band
Air/Fuel ratio meter must be used at some stage to measure the Air/Fuel ratio
over all engine loads and speeds at which you intend to operate the vehicle.