Thank you, and sorry for the late reply.
I think I can feel a small performance-improvement. So I can recommend you'd Intercool your Volvo
The Volvo greenbook also says, that standard boostpressure is 0,6bar without Intercooler, and 0,9bar with. I have not adjusted the pressure on mine, but I have thought about it
Is your car in the gallery on this page?
/Dennis