AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 266)

Page 266 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
Fuel Trim Bat-Pri and Fuel Trim Bat-Sec channels. To determine how the Fuel Difference
Map is being used, monitor the Fuel Difference, Fuel Diff Trim and Fuel Diff channels.
Switched Ignition Retard/Cut
Switch Retard Output Pr:
This option allows the output pin to be activated for a controlled amount of time prior to
the timing retard/cut happening. This allows the system to prime the pneumatic actuator
before decreasing engine power. For use with air-shifting systems only, set this value to
zero for driver-shifted gear levers. Recommended values: 10-50ms
Switch Rtd Time Out:
Time during which the ignition is decreased or „ramped out‟ as opposed to immediately
changing to max retard. (Recommended values: 10-50ms)
Switch Rtd Max Rtd:
Maximum ignition retard value. (Recommended values: 20-40 degrees, depending on
original ignition timing map)
Switch Cut Time table: