I had an 11psi spring in my tial BOV and it wouldnt blow off so i had compressor surge so i bought a 9psi spring and it still doesnt sound like its blowing off and still sounds like compressor surge. what could be the problem? on my boost/vacumm gauge it reads about -21in/hg. Also my tial wastegate spring is a .4bar which is 5.80psi and im only reading like 4-5psi.

 

Do you have a separate vacuum line running to your BOV from your IM with no T's in it for other vacuum sources also have you played around with the setting screw, not sure if your BOV has one but I dont see why not.

 

where is the vacuum line running? 5psi is pretty low boost so some fluttering may occur, there is a difference between the two. can you post a video or sound clip? that would be helpful to decide what sound you are hearing.

 

Tial BOV's are non adjustable. and i have my BOV T-d into my PCV hose into the front nipple on my skunk2 intake manifold. then i have my wastegate T-d into my fuel pressure regulator. i took pics but do not know how to post them.

As of right now i do not have a video or anything but im pretty positive it is compressor surge. it just sounds like a flutter noise. Yes i know 5psi is pretty low i plan to get a boost controller soon and up it to 8psi but dont feel like paying to get it retuned again for just 3 pounds.

 

honestly i think you are confusing flutter with surge, thats not the same thing. i think the bov is probably working fine. i would suggest giving the wastegate and bov their own 1/4" line with no tees

 

3psi is a BIG difference
esp with a decent size t3 t4 turbo

 

^Werd, I gain 20whp with 2 more lbs.

 

ill try giving them there own lines. is it ok to t the PCV and fuel pressure into each other so that i can give the bov and wastegate their own lines? also what is flutter then? i know compressor surge is when the BOV doesnt open and makes the turbo compressor spin backwards correct?

 

the reason i think its compressor surge is because when i get on it and shift or let off the throttle is when i makes that noise sounds like its comming from the intake off the turbo. ill first try to give the vac lines there own source first. and ill keep you update unless anyone has any other ideas

 

u should not have the pcv hooked up at all

 

what do i do with it? do i plug it at the pcv nipple thing below the manifold or what?

 

Remove the entire pcv system.

you can install a catch can.

b & r fittings sells them
check the classifieds

 

instead of buying a catch can can i just t my pcv into my FPR going to the intake manifold and run my BOV directly to the Intake Manifold?

 

How do you go about picking TIAL bov spring size? Is it correlated to the wg spring size or is there a different calculation that's used?

 

you have to find out what your vacuum at idle is, there is a spring that corresponds.

 

do everything above and make sure the bov is connected to the manifold with 1/4" ID reinforced vac line