hlo ppl i recently fitted a manual boost controller/bleed valve on my s70 t5 2.3,turned up the boost controller and was getting around 18psi,so i turned it up a bit more an the boost has dropped a little. an now with it open a lot it will not go up anymore than 15psi WHY??? the boost will not go anymore than 15psi ish also fitted a pipercross filter too,any tec ppl cheers. its starting to worry me!