[stevieturbo]

Why not speak to A&A ?

Putting the nozzle AFTER the air charge temperature sensor is not a smart idea. Its best for the ecu to see the temp change.

As for lowering boost, that is very easy to achieve. Just block or vent the signal line to the air bypass valve or BOV ( using a simple solenoid ). If this doesnt have boost pressure applied to it, it will simply blow open causing a very sudden boost drop.

IMO putting the nozzle where you have, is far from ideal.