V40 T3 2.0 remapping

[Chris81]

I'm getting my T3 2.0 remapped in a couple of weeks time - just an off the shelf version as I don't need to push too far. The map gives 190 bhp which sounds about rught as that's just taking to the T4 level which is available abroad. I wonder if much of the tuning is not just turning up the boost pressure? I found from OBD scanner a peak boost of about 7PSI on mine as stock and from what I read is nearing the limit on a 11.3:1 compression engine. Maybe a remap could take this to 9PSI, but it's possible gains are made elsewhere as the 2l engine should be able to deliver over 150 as N/A? Taking into account the T4 has the same turbo its possible the T3 and T2 are detuned versions in many ways.

I'm no expert - just armchair research so maybe others have some more insight? Many thanks.