AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 197)

Page 197 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
Ign Trim Coolant - Displays the current ignition timing correction for coolant temperature from
the Coolant Ign Trim table
Ign Trim Idle - Displays the current ignition timing correction for idle from the Ign vs Idle RPM
table
Ign Trim Gear - Displays the current ignition timing correction for idle from the Gear Ign Trim
table
Ign Trim 1 - Displays the current ignition trim (in degrees) from the Coil 1 Ign Trim table. All
other coil output are similar in function.
Knock 1 Retard - Displays the current ignition retard from the knock #1 sensor in an attempt to
eliminate detonation.
Ign Timing - Displays the current ignition timing of the engine after all compensators have been
calculated
Vehicle Speed
Once setup, the vehicle speed input can be logged and used for many functions including
speed dependent boost control.
Vehicle Speed Setup Options
VSS Cal * 8 Units: On/Off Description, This is the coarse adjust for the vehicle speed input.
Setting this ON increases the range of the VSS Calibration option.
VSS Calibration Units: Multiplier Description, This is the fine adjust for the vehicle speed input.
Increasing this number makes the calculated vehicle speed increase. If 256 is not enough, set