Harvey ,aka the Boost Creep, comes by the shop to discuss Subaru engine knock, ignition timing and what to watch for on your Accessport. He brings some serious knowledge on how fine knock learning, feedback knock and DAM work together to control ignition timing in Subaru engines.

You can find Harvey here
[ Ссылка ]
[ Ссылка ]
theboostcreepltd@gmail.com
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00:00 - Intro
00:47 - What is engine knock?
01:47 - Subaru EJ vs FA knock difference
02:34 - Different kinds of knock
04:46 - How does engine timing work?
05:17 - Ignition before or after TDC (Top Dead Center)
08:34 - Different levels of engine knock
09:53 - Knock pressure waves inside an engine
10:42 - Knock sound frequencies
11:00 - Knock sensors are microphones
11:40 - Sounds that cause false knock
14:10 - Knock sensor shows symptom but not actual event
15:50 - What parameters to watch on an Accessport
18:36 - Feedback Knock and Fine Knock Learning
22:09 - DAM (Dynamic Advanced Multiplier)
28:00 - When values should be dynamic or consistent
28:30 - Best way to watch for knock
31:00 - Look at the log data not the Accessport screen
31:22 - DAM on EJ vs FA
32:07 - Knock is not on or off, it’s progressive
33:16 - Raw knock data doesn’t include ECU filtering used to exclude false knock
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