i have a ported motor and i'm running my twins non-seq. when i get anything more than 10 psi i start hearing a weird whisle noise (not turbos and not boost leak from pipes). it sounds almost like a superchargers pully noise.
can it be my blow off valves having a hard time keeping the boost in?
i've been running the turbos at 15 psi for almost a year with the same stock BOVs.
what do you guys think?

 

I have no idea if yours are going out. I've never heard of a problem like that. I do, however, have both stock BOV's. make me an offer via PM if you need them. I was going to ebay them this week anyway. take care,

-BN