Merlins Ralliart and EvoX TUNING GUIDE Version K.pdf - EvoScan

MERLINS RALLIART & EVOLUTION-X TUNING GUIDE5.03-IGNITION TUNING – WARMUP RETARD SPARK MAPWhen the engine is warming up, there is another timing function enabled to get theemissions systems catalytic converters operating efficiently as quickly as possible.This is to reduce NOX and to speed-up closed loop operation. To get the catsheated quickly, this WARMUP RETARD SPARK MAP is used where the cell values aresubtracted from the spark map. This map is commonly referred to as the WARMUPRETARD MAP on some xml definitions.The retarded ignition timing is frequently a cause of complaint from Evo driverswhen their engine is cold, but is easily fixed by reducing the values or even zeroingthem out, though this is not necessary. In any case though, zeroing the cells at1000rpm and 1250rpm would result in better idle stability. Especially when usingbig cams.Figure 20:IGNITION TUNING – WARMUP SPARK RETARD MAP, stock RALLIARTFigure 21:IGNITION TUNING – WARMUP SPARK RETARD MAP, stock EvoXREV: 0.K merlin@three.com.au Page 46 of 134