Boostintegra

Well, i just installed a custom turbo kit on my 94 integ ls including a brand new tubular manifold, turbonetics wastegate (6 lbs), air research t3 (ordered it off the net and the compressor rubs, sounds like sh*t), apexi bov, custom made piping and a 22" front mount. Now im running off the wastegate with no boost controller and im wondering a couple things. First, what is the max, reliable psi i should run with stock internals. My other question is...my blow off valve is adjustable (of course), should i loosen the spring a lot, tighten it? What would give the best performance/ sound? Thanks to anyone who replies!