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Hi! I am new to ecu tuning. I have some problem understanding the maps for spark advance. As u can see in the pictures below the “optimal spark advance” is in positive value and the “spark advance base map” in negative value. What am i missing?
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Hi Nicola,
From looking at the pic I would take it as though the ignition is being retarded to reduce torque at higher boost levels especially at low RPM.
This is probably an engine protection strategy due to knock or hardware limits.
The peak ignition advance looks to be 27.75degrees before TDC from around where i would expect peak torque to be, this is typical.
However the value flatlines from there up to peak RPM which would suggest that this configuration cannot achieve MBT timing.
Regards,
Scott
