Just fitted an Apexi dump valve and front mount to my 94 wrx and having problems with the dump valve dumping all the turbo boost pressure at about 0.5 bar, not good. Also it has now started stalling occasionaly. Has anyone got any instructions how to correctley adjust the dump valve before I start playing with the adjusting screw. Sounds weird as it makes a whoosh sound compared with my forge which was a wrc style chatter, but this also dumped boost pressure but not until 1.2 bar.

Cheers for any help,

Colin.