I only managed 138rwkw with usual mods + 8psi. They simply dont make the power without a tune.
with my stock turbo i was making 195rwkw by adding power FC + front facing plenum and 12psi at the last stage before I upgraded to my current turbo
Your dyno printout shows where its dropping power because the ECU will be pulling timing out and adding fuel to stop what it thinks will damage the engine
Do you have a printout with the AFR's?
FYI, my original setup on 8psi the AFR's were around 10:1 under full load which is way to rich. My car simply wouldnt handle 10psi when I tried that, would just cut the engine at about 4500rpm, wasnt coilpacks or plugs, was just the ECU going into overprotection mode