You experienced guys correct me if I’m wrong... but a little “knock” (as in a negative number) on cylinders 1-4 is ok guys. Direct injection engines are highly susceptible to knock. You just don’t want a ton. Sure, less is better. But we’ve been tuning my new BT pump gas file and I have streaks of -2.5’s in some of my cylinders in some logs, and my tuner (613B6) says it’s fine. It’s ok if it doesn’t show 0 the entire time. Plus you have to remember how high the sample rate is, if you see like 5 lines of -3 for example, and then 0’s, that is like a teeny tiny little blip in time.
Yes, generally 93 tune on 93 gas is fine. Ya crazies. But you should log and make sure you’re not getting excessive knock (like what, -4 or -5 or more for a long streak in the logs?)
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