Just go with a new vf52, I'm on stock fueling with a smaller boost pill and make good #'s. I also have the banjo filters removed and stock oil lines.
195k, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here