I m working on a similar set up as yours , have the same knock issues as you. I thinks it s more a very bad conception of the kit and some exhaust piping are hitting the strut tower , or anywhere else I did nt see.

Mine is a manual not auto . I did 550hp at the wheel on the 4th gear (1.34:1 ratio) at 8psi.

When you have to run 116oct and still have knock activity , this tell it s a mechanical issues.