Tried the cap and no difference. The tank is new with new lines so I really doubt the pick-up.

Also, this is pretty consistent and doesnt feel like a fuel supply issue, at least not the supply before the pump.

I was able to better feel it out today. I would go into 2nd gear, for example, and would watch the boost gauge. I would rev up fairly well into mid range to higher range revs, and would hold the revs constant and be at about 4 PSI for 5-10 seconds, then I'd feel the burst of power and my pressure would go up to 6-8 PSI, but I think the pressure increase is due to the engine revving up/getting more fuel rather than it being a turbo related issue (that's my feeling about it anyway). I did just inspect the turbo completely and nothing seems out of place or odd.

So it feel like fuel is being held back until higher revs are held for a little while. It will repeat this again in the next gear, usually, in the same way. Weird!