Hello all! I know that there isnt any boost control on that engine and you can gain power only by the fuel pressure
and timing. Is there some way to put custom boost control or any other trick to increase the turbo pressure and the fuel accordingly.

Any kind of manual boost controller will do.
or if you fancy going high tech, take a look at an electronic boost controller.
go fast bits make a really nice one ;)

Thanks, bro! That gave me some hope. I will post here when (if) the job is done.