I have a stock VR6 MK4 with about 90k miles on it. I got a garrett T3/T4 turbo .60A/R cold side .82 A/R hot side. ATP MAnifold. I will be using an intercooler. I'm building my own SRI. Will be C2 software w/ #42 injectors. What PSI would be safe to run with this setup? I would like to get 250-300 whp.