Please check out my datalog from my AccessPort.
When at WOT my boost fluxuates. It over boosts to over 18 psi. I should be close to 16psi, because i am at stage 2. I have a catless tbe, catless up-pipe, ebay turbo inlet, and thats all that should have to do with the engine.
You can see the fluxuating at 3, 5, and 6.5 seconds.