So, ive been chasing a interesting problem for the last couple days. In my tune i have commanded between 4-5 degrees of Main Timing in the 1300 rpm range at light throttle (less than 30mm3). Yet i can hear chatter and can see in the log it goes up to around 10 degrees which i feel is way too much. Ive tried zeroing the correction tables on the ECT, IAT, Baro and Boost without any change.
Where is the extra 5-6 degrees coming from?