And besides that, a stock turbo will make 11, 15, 18 or whatever psi with either engine, it's only the wastegate that bleeds off more air with a bigger engine. As long as that's not restricted or over-run, the turbo could care less what engine is pushing it.
A few years back, a friend of mine made the infamous 2.7L DSM engine and ran it around with a 14b. He said it had no issues and went like a bat out of hell. I didn't see it personally, so it might or might have not been true.
