Boost and a 12.0CR engine is NEVER a good idea..... especially with street gas.... maybe 7.5 psi is the most you could run.....but in theory that could be 200hp gain? But that would be pushing the limit of detonation in street gas....
2008 E92 M3, MR, DCT, extended BB leather, loaded!
1988 Porsche 928S4, Guards red/Champagne leather
1989 Porsche 928S4 track beast!!!