Really doubtful it is the boost solenoid.
You should be running on wastegate boost for the first 1000 miles anyway. You also really should not be on the stock map with the mods you have, especially if you are exceeding wastegate boost.
What do your fuel trims look like in closed loop before the transition? Post or email logs.
A post-MAF air leak is always a possibility with that Gimmick inlet. We can test that for you and log the car to figure it out on Monday.
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