Originally Posted by mocohead
How do you know? What are you using to monitor knock?
I haven't heard any symptoms thus far, though the only method of monitoring is listening for audible symptoms
Based on BMW's history, I'm really not concerned bumping up the boost by 3psi using 91/93. I'm fairly certain our ECU has a fail-safe in place when it comes to knock/det/pinging independent of allowable max boost.