How would I determine if my harmonics are different with my engine than the evos? I have an evo rom flashed into my ecu and pasted in my map perfectly into the evo rom but despite dropping the timing 5 degrees I am still hitting 20+ counts of knock . In my stock rom this same map was giving me only 2-4 counts of knock. So came to conclusion knock filters must be different but how to tell? Thought about trying to paste my stock rom filter maps into the evos but afraid I might screw something up what should I do?