Hey everyone, so i have been street tuning / daily driving my car for a few years now. It has been ok, and more recently i have been playing with my timing map specifically in boost. Can people offer some opinion on it, because looking at my plugs i am pretty sure i am getting some detonation. They have tiny amounts of silver specks and white build up not tan color. I target and am seeing AFR's in the 11's in boost, 12.8 by 100 kpa, 14.0 by 75kpa, 14.7-15.2 up to 60 kpa.

Set up is- stock 1.6 with MS1, rx7 460, toyota cops, 14b turbo with diy log manifold, 2.5 exh from turbo back, intercooled, walboro 190, run 7-12psi.

Mostly just been turning by feel and how car responds, Pulls fine from what i can tell but plugs do not look right.

Looking for some advice, thanks in advance!