AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 195)

Page 195 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
degrees of additional timing during warmup can help quite a bit. Note that the trim values in this
table are added (positive values) or subtracted (negative values) from the base ignition timing.
Individual cylinder trims are used to compensate for uneven air/ fuel distribution or cylinder
cooling problems. Each EMS coil output has an associated trim table. The Coil #1 Ign Trim
table is used for the EMS Coil #1 output. The X-axis of the table is engine RPM.