Feedback knock correction
What feedback knock correction (FBKC) means in a COBB Accessport datalog, what is normal, when repeated corrections matter, and what to check next.
Datalog guides
Plain-English explanations of the things a COBB Accessport datalog can show you, written the same way APDataview checks them.
DAM (Dynamic Advance Multiplier)
What DAM, the Dynamic Advance Multiplier, means on a Subaru or COBB Accessport datalog, why 1.0 is the goal, and what a lower value tells you.
Fuel trim at the −25% limit
What it means when A/F correction sits at -25% in an Accessport datalog, why a pinned trim is different from a large one, and what to check.
Boost overshoot and wastegate duty
How to read boost versus target and wastegate duty in an Accessport datalog, what overshoot and a maxed-out wastegate mean, and what to check.
AFR vs lambda
The difference between air/fuel ratio (AFR) and lambda in a datalog, why COBB logs AFR and other ECUs log lambda, and how to convert between them.
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