Haltech E8 - Manual (Page 84)

Haltech E11/E8 Instruction Manual
Ignition Maps
The E11 ECU has two ignition maps from which the ignition advance angle is calculated. These maps
define the base ignition timing for the given load and RPM at which the engine is operating. The default
ignition map that is used can be selected from the Ignition Setup page.
Figure 87 - Ignition Setup Page
The selection can also be made from an auxiliary input. See auxiliary inputs section for details on setting
up dual mapping using an auxiliary input.
Make sure that your base fuel maps are fully tuned before attempting any mapping of ignition advance.
Incorrect fuel requirements can cause pinging or detonation that is unrelated to incorrect or too much
ignition advance.
If you have access to a dynamometer, use it to apply load to the engine and increase the advance from a
conservative value until peak torque is attained for every load and RPM point. Avoid sustaining an engine
under high load and engine speeds for any length of time.
It is good practice when tuning the high load bars to load the engine briefly before backing off and tuning
the map while off load, then re-applying the load and comparing. Avoid holding the engine on high load
whilst tuning to keep engine stress and heat to a minimum.
The process for tuning the load points and RPM ranges are very similar to tuning for fuel. Instead of
aiming for good mixtures however, you should be aiming for maximum torque for the given load and
Page: 84 Copyright © Haltech 2008
WARNING
Driving a vehicle over time, on poorly tuned maps can lead to engine damage
over that period. Before adjusting ignition, ensure that your fuel maps provide a
safe operating Air/Fuel ratio. When adjusting ignition, always ensure that the
engine does not detonate or ping over all the engine speeds and loads at which
you intend to operate the vehicle.