I know it's best to change IC, Injectors, intake and turbo, but I just want to make this setup better .

I've done some adjustments in fuelling. Now Lambda issuse seems to be almost not present. But I think and feel it that my power output is small, I touch 190g/s of air which is about 238HP. I know that with K03 and DP I can make 250-260. So the problem still exist but in another way it looks like.
I've read that my boost should taper to about 13-15psi (0.9-1 bar of boost) but actually it tapers to 9-10psi (0.7-0.62 bar). The problem is car can't get desired load, when I request 158% at 6400 (from previous 114 group log) I just get 137%. I'm uploading new logs and reload previous log with engine load (as I see situation almost didn't changed expect high boost loose, but 6400RPM load still the same). Maybe someone has any idea how to help me? Or should I throw turbo to trash or the whole car ?