Hmmm, yeah something is off on this.
I know its a 2.2 but it should pick up boost sooner and keep pulling seeing you did head work along with that GTX. Have you checked to be sure the turbo is in good working order?
I'm running a 2.5 with similar head work but 8:1 and 92 for fuel picking up boost at 4k and it made more power till I cut it off st 8k.
But that aside good work making that bay clean, also what fenders are those?