I modded my IAT onto a relay, so when I hit the 2 step button, the relay opens and disconnects my IAT. The IAT reads -38 degrees. In my tune, I have it tuned to be at about -10 degrees of timing to spool the turbo. No matter how much I change the multiplier tables, it will not go below 5 degrees. I'm assuming there is some modifier table that I am overlooking. I will attach my tune below.
Tune: Turbo 4.8 Tune BTR NSR cam current.hpt