My KR was the same before I put the ZZP coils and wires on.

I do have an aero force scan gauge, that's how I'm reading my KR values.

I am running the stock thermostat for the winter months. The 160 is ran in the summer.

I may try a dyno tune in the spring.

With the mods I have shouldn't I be able to at least run a 3.6" ??