Knock only at low rpm range

[matthewho23]

Hello everyone, I need some help for my tune.

I have been trying to solve this problem.
Little info about the car:
2010 Civic Si
Stock Engine K20Z3
Ktuned Race headers + Invidia N1 3inch exhaust with no cat
Custom ducting to lower grill to feed direct air to stock intake
ORC 309D Clutch

I am getting knock (10-20 each time) registered in cylinder #3 at first to third gear around 2000-4000 rpm during part throttle. Most noticeable is when I am pulling away from a stand still. Knock Control also rises to 90-100% (it will very slowly go back down to 80~% when cruising) This all kind of thing never happened during high load or WOT and even at the track.

I tried different kind of adjustment in the tune, but none of it helped.
I already tried lowering ignition timing, adding more fuel at those load zones, add more tip in fuel etc...

Everything else in the tune "I think" should be ok in terms of the AFR, Cam Angle and such.
I am not sure if its something related to the mechanical from the engine because even with the stock tune the car behave the same....

I would love to have some of you give me some input on this issue. Much appreciated!

I will upload my tune and some datalog here later today.

[matthewho23]

Heres the current tune and datalog from few days back

[matthewho23]

I attached my most recent tune and log. I again lower the ignition timing, I think it helped a little but the knock control still went up high (car is running 94 Octane btw). And knock retard again pulling timing.