mine runs this described setup on a basically stock motor bar the fuel pressure being jumpered to run at 13.5 v
Mine runs maxumum 14 pound of boost when the boost controller is wound to maximum ( as it was on dyno day )
ive got no detonation issues - motor runs happily ( so far ) and you can definantly notice the extra go ..
it ran 113kw on the rollers at the shootout - which going by the other gt4 's there that ran stock - ( bar the 205's ) it was up about 10KW on them - not alot - but its there - plus you can wind it down in traffic if you dont want the thing to suddently launch
any more boost than this and you really start having to look at upgrading the stuff around the motor ( ie intercooler , ecu , fuel pump , turbo upgrade/highflow + exhaust/dump pipe ) + strengthening of internals
mind you im still learning about it - and whats been done to it - so ill leave it as an example of what just the boost contrller does when properly installed