I got a LS1 from a Camaro 1999 that I fitted a Procharger P1SC kit from a Pontiac GTO 2005 LS2 on. Should be a 7psi setup.

I wonder how your boost curves looks like?

When I log I can see that the boost rises from 3500rpm to 6200rpm and is max 140kpa at the top.

I would think that I got more boost than 7psi because its a smaller engine with less power than the LS2. I suspect a leak somewhere?!?

Pictures here http://www.hocky.se its the Volvo 242.