That kind of explains a lot - when the car blips one or two degress of total KR at wide open, nothing happens to commanded boost for me. One could assume that if the knock airmass was strictly based on total KR, it would drop commanded boost for protection. Also based on what you said, the closer your base advance is to high octane, the more profound the effect of the knock airmass table. Again, thank you for the additional clarification - it will go a long way to making faster and safer work together!