Originally Posted by pippen
It doesn't seem like I have a busted ringland, the turbo seems to be making boost just fine.. Could it be as simple as installing an AOS to fix the knock issue?
You ignored the best advice.
A turbo will still make boost just fine with a busted ringland, there is almost no correlation for the 2 in that sense. An AOS does nothing for knock. AOS will get rid of the oil in your blow by, not reduce knocking.
Best thing you can do is a compression and leak down test.