your log is a good example of a well running maf engine with really mild modifications that probably doesn't need much tuning.
load both your logs into eehack at the same time and run the analyzer with default settings (i pick really good defaults)
look at the knock scope and AFR
most of your 'knock' is just under 1000 rpm and over 50 kpa. this is either due to driver error (lugging a manual) or torque converter too small. when an engine gets towards the point that it wants to stall out, it often lugs and clatters and sets the knock sensor off regardless of ignition timing. it's really nothing to worry about from a tuning perspective. you could remove a bit of timing advance and adding some fuel in that range to see if it helps.
your cruise range AFR is really just fine, barely even worth tuning. you could play with your idle timing advance and stuff to get a better idle (not sure how smooth it is right now) and then start working on WOT tuning.
cr_afr.png
knk.png
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