Re:My BOV gives off 4-5 blasts instead of just one big blast. Why?
 

no little screw, just a bolt shapped cap that tightens with the hose fitting on top.

Re:My BOV gives off 4-5 blasts instead of just one big blast. Why?
 

not true, fluttering isn't necessarily comp surge, my bov flutters, that's just the sound it makes, i know it's not comp surge. i actually like the low flutter, imo it's better than some ricey ear piercing whistle.

Re:My BOV gives off 4-5 blasts instead of just one big blast. Why?
 

fluttering can be compressor surge and/or too stiff a spring tension, which is why when they cut the two coils it solved the problem.

Re:My BOV gives off 4-5 blasts instead of just one big blast. Why?
 

no the fluttering is compressor surge, not the bov. a lot of people make this mistake because it sounds almost identical. only one is ccchhhh and the other is chh chh chh. haha

Re:My BOV gives off 4-5 blasts instead of just one big blast. Why?
 

yup....if it sounds like this a bunch of tinny blow offs one after the other, it is your turbo surging out the pressure. maybe your BOV is too tight, OR not working.