for detonation. Plus the better intercoolers so he doesn't have to worry to much about the extra heat from taking the stock turbo's out of they're efficient area. So i would say 14 every day usage, 17 max every so often. Just don't run 17 all day long. But the gains from 14-15 psi aren't really that much. I have a friend running 15. He was running 17 dropped it back down and in his opinion was pulling harder on 15. I know it doesn't make alot of sense. Which any thing over 15 is just blowing hot air. But that's just my opinion.
