Haltech IG5 - Manual (Page 42)

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CHAPTER 7 CORRECTION FACTORS
The Haltech IG5 has correction maps to adjust ignition timing for coolant and inlet air
temperatures. These maps are set to provide a base correction for almost all engines.
7.1 The Ignition Coolant Map
The Ignition Coolant Map allows up to 10° advance or retard of the spark timing based on
engine coolant temperature. This Map should only be used if there is a need to adjust the
timing for low or high temperatures.
7.2 The Ignition Inlet Air Temperature Map
This Map allows up to 10° advance or retard of the spark timing based on the inlet air
temperature. Normally this Map would not need to be used, but in some cases such as high
inlet air temperatures on turbo/supercharged engine, retarding the spark may help preserve the
engine.