Just for your own reference, lengthen the rod as long as it'll go. That'll let the wastegate open sooner lowering boost. Then shorten it as short as it'll go. That'll hold the gate shut as long as possible. Then disconnect the boost line to it.
Make 2 or 3 identical runs at each and then you'll know low, high and unhooked numbers. Then you can adjust the rod to your preferred location.