Before we go further, can I just make sure that I am clear - effectively the boost seen by the inlet depends on how much air can flow through both the engine and the turbo. If the turbo is small, then the pressure is effectively 'backed up', so volume is reduced, and the pressure is increased. This is why 2 bar in a T3 is different to 2 bar in a T4.
sounds good to me
in the second half of your question,, are you asking about how to make your engine a low compression engine?