You can't fix something that screws a closed loop boost system into a open loop system by tuning for it. The only good way to run a BOV is to get tuned for Speed Density(Read:you have no need for a speed density tune at this point). So, In short....don't touch a BOV and research the crap out of a recirculated BOV before you even begin to think that you need it and which one is better than a cheap part. It causes too many headaches if you don't go for quality over quantity with this decision.
378awhp/373wtq Custom Dom 3 & CBRD tuned 2006 STI.
"When in doubt...flat out" - Colin McRae