There is no guarantee than just swapping the throttle will change anything: it’s not good practice (and does not make sense) to demand more than the engine can produce, right?just please do in same temps
Since the strategy is demand-based and targets a certain torque value, removing restrictions will make it easier to satisfy the demand and reach the target, but no more.
Someone needs to tweak the demand, otherwise all you might see is the PCM closing the wastegate a little less, trying less hard, if it’s a little easier to meet the same demand. In fact, there is data out there published by Velossa - the snorkel guys - that shows a reduction in wastegate duty cycle with their add-in, probably combined with a free-flow air filter. The engine makes the same power (or marginally more depending on ambient conditions if the charge is a little less hot) but with less overall effort, less turbo speed and less back pressure. This opens more potential.
There are also tables that help the PCM predict the throttle angle that produces a certain flow at a given pressure, and it’s inverse which infers the flow from a given angle. Finally there are tables modeling the pressure drop across the throttle under various conditions. Some of these might need adjustments to achieve accurate control.
Some tweaking is necessary to maximize the use of a larger throttle, the torque demand at the top end for starters, and for perfectionists to make sure the PCM does not over or under correct, thinking the throttle is smaller than it really is.