I think I recall Vit saying knock is hard to guage in these motors. As long as you stay with the base tunes/Vit Stage 1 you'll be ok. They are still pretty conservative.Ok - I was just going off of the default screen that shows up in the program as it is currently setup. I'll look for that next time. Will there be engine sounds or actions that indicate that something is wrong with a tune? Or is this something that's imperceptible?