boosting
 

now i was wondering wat you guys think. i have a apexi boost controler and i have one setting on 10 psi and the other on 15 psi, now when i put the setting on the 10 psi it just boosts to 15. wat do you think it could be?

The exhaust is overflowing the waste gate.
The fix is to port the waste gate, so it can flow more & limit the excess boost.
http://208.62.166.66:82/guest/pics/9...aste gate1.JPG
http://208.62.166.66:82/guest/pics/9...C/WG port1.JPG
http://208.62.166.66:82/guest/pics/9...C/WG port2.JPG

Boost creep.

With NO controller at all I hit 10psi in 3rd and 11+ in higher gears.

The S5 wastegate is pretty good but can be improved.

Do a search on wastegate porting

do you think the plug for the wastegate is out? i think that happend to me last time.