i think it's got a lot to do with the management system your using, if you upgrade to a weber(cossie management) system the engine can be set up a lot better and you'll get more power and be able to run more boost and that it'll be RELIABLE, mine runs 19psi on a standerd bottom end, and has been running that for years with no problem at all but i know of cars running 24psi with no issues but these are all on weber managed systems