I don't mean to show my intake pic again but you can see the bypass in this shot:
On the top of the supercharger in this pic you will see a vacume line distro system with one that comes out and curves to the right with a white stripe on it and leads to a black canister, that is the boost bypass valve.
make sure the vacume lines that run to it are tight and not cracked. Also start the car and rev it in park and watch the little arm that comes out of the bottom of it, it should move DOWN when you rev. This means it is closing the valve in the blower to stop the recirculation of the boost pressure to the top of the blower. It keeps all boost in the lower intake manifold. If this arm moves UP at all meaning opening you can have a fluctuation in boost under WOT.
So again, check the vacume line system and make sure it'* all sealed up. If you need to you can losten the bolt on the blower that the boost bypass bracket attaches with and the bolt on the outside bracket and slide the canister in a down and left direction closing the gap for the arm to close to a shorter distance. This is known as the boost bypass valve 'trick'. You will see boost faster as the arm will close before it normally would allowing full boost pressure at less throttle %age.
If you have more questions or need images/step by step, let me know.