If it's doing it on both tunes then you can rule-out the tune, and if it's across the board and uniform then you can rule-out mechanical looseness. The fact that you say it's uniform and repeatable means that you have something wrong with your fundamentals-fuel, air, or spark. Off the top of my head I can't think of anything else.
Verify your plug gap (I stay between .026-.028" though the factory manual calls for .031") and compare your boost/afr/airflow mass measurements along with your fuel rail pressures between your recent logs and the last-known good ones. Obviously you'll want to pay more attention around the rpm range that the knock develops, but looking outside of it can give clues as well.
Verify your plug gap (I stay between .026-.028" though the factory manual calls for .031") and compare your boost/afr/airflow mass measurements along with your fuel rail pressures between your recent logs and the last-known good ones. Obviously you'll want to pay more attention around the rpm range that the knock develops, but looking outside of it can give clues as well.