Alex takes 10+ years of Subaru tuning experience to explain what causes feedback knock, fine knock learning, and DAM drops. Many folks are concerned about their knock numbers. What do they mean? Find out more in the video.

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0:00 Intro/Why are we making this video?
1:46 How does a knock sensor work?
2:47 What is spark knock?
4:39 False Knock?
5:11 Aftermarket Tunes and Our testing
7:10 What if your DAM never drops?
7:52 Knock sensor sensitivity
9:10 Is your tune "good"? Our approach
10:17 DAM drop analogy
10:40 Outra/Recap

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