my bov concern

[josephg15]

i have a greddy -rs bov and its on the cold pipe right before the throttle body...when i give the motor gas and let off the spring in the bov doesn't come up...so i dont hear air come from the bov...is there something wrong?

[Tulsa_S-13]

Is this happening at idle? If so more than likely when you are giving it gas you're not getting into boost.

Do you have a boost gauge?

Does this happen when driving the car?

[josephg15]

im not too sure if it happens while im driving but i would think if its opening i would be able to hear a different sound...it sounds almost like a stock bov...i hear the sound more out of the intake filter, not the bov...yes i have a boost gauge, the car boost fine and i holds boost.

[adrianfromthecastle]

do you hear compressor surge? how much psi are you using? lastly, which or how many springs are you using?

[josephg15]

hear compressor surge??? whats that? i hear the turbo spooling if thats what you mean...im on stock psi right now (7) springs for what? i thought when you let off the gas the bov is supposed to pop up and let excess air out?

[Tulsa_S-13]

Not necessarily. I know that during normal driving I'm mostly in vacuum and will maybe hit around 1psi. If you're in vacuum and the turbo isn't making any boost than the BOV won't discharge.

[adrianfromthecastle]

hear compressor surge??? whats that? i hear the turbo spooling if thats what you mean...im on stock psi right now (7) springs for what? i thought when you let off the gas the bov is supposed to pop up and let excess air out?

compressor surge is basically the bov not blowing off when supposed to, and the turbo getting the pressure...

it sounds a lot like a "flutter" http://youtube.com/watch?v=OuNTnA5A2Fo

if so, your spring is probably too tight. Did you use both springs?

[josephg15]

but i dont understand why i doesnt sound different from my stock bov...this is my vaccum line set up...- bov is on cold pipe connected to a tee with the fpr and goes to the throttle body.- boost gauge is directly connected to the throttle body- wastegate is connected directly to the hot pipe

anyone else have something different?

[Tulsa_S-13]

Here's how I have mine

-One line going directly to BOV-FPR and Gauge are t'd together on another line-Wastegate line to coldpipe nipple(stock SMIC setup)

[Sabot]

same happens to me with the rs change to R2D2 and not as bad but still some surge Im thinking on getting the hks ssq but really don't want to. Vacum good no leaks, took the small spring from the rs out but then the big one is too weak WTF I even switch springs between the rs and R2D2 they fit but same crap

[josephg15]

are you talking about a spring in the bov??? i haven't done anything to the bov since i got it...do i need to take the top off to get to the spring? what am i supposed to have 1 or 2? its a greddy type-rs...i wont be able to get to it till tomorrow...so let me know whats up and ill have to get back to you tomorrow. thanks, joe

[Logan76]

Listen, the sound your hearing out of your intake filter is most likely compressor surge, it sounds that your BOV is either not getting the vaccum it needs to open it, or it is not correctly adjust with your boost setting's, you need to check, if its hooked up correctly with a vaccum line, then I would say you need to adjust the pressure on the spring of the bov, most likely loosening it.

[josephg15]

i checked out the video on youtube.com provided " adrians_s13 " and thats exactly what it sounds like...so is my turbo getting the pressure and not going through my bov? that sounds bad...i need to find out what spring you guys are talking about.

[adrianfromthecastle]

take it apart. theres 2 springs in there, its too strong for just 7psi, its not releasing. Take one spring out, and keep one in, tighten it down all the way, and drive around, and gradually unscrew making the spring softer till it releases. If its too soft, you'll stall.

[Logan76]

if its too soft youll be blowing off at idle, almost like a leak, but you'll be able to tell when its adjusted correctly, you want it to blow off right around your 7 psi when you let off the throttle.

[josephg15]

so do i just take the top off...the cap looking part?

[adrianfromthecastle]

so do i just take the top off...the cap looking part?

well, theres the screws (i think 6 or 8) around the top. Unscrew all those to take the whole blue top part off.

[josephg15]

****!!! the last one i stripped...well i have to get it off tomorrow...i hope thats the problem...ill let you guys know tomorrow morning when i get to work...thanks for the help. joe

[josephg15]

damn you guys know whats up...yeah you guys were right i did have both springs in my bov...i took one out and i will put it back on the car when i get home and ill let you know what happens...i took the smaller spring out and left the bigger one in...should i have taken the bigger one out and left the smaller one in? trial and error. we'll see what happens. thanks again, joe

[onecrazyfoo4u]

So how did you get the bov apart....just by taking off the 6 allen screws around the edge? Because when I did that nothing happened, the bov was still stuck together. I'm thinking maybe you have to pry it apart pretty hard?

[adrianfromthecastle]

So how did you get the bov apart....just by taking off the 6 allen screws around the edge? Because when I did that nothing happened, the bov was still stuck together. I'm thinking maybe you have to pry it apart pretty hard?

its just been stuck together for awhile, you have to wiggle it to unstick it maybe

[josephg15]

after i loosened all the allens the damn thing wanted to pop off by itself...but yeah try prying it. it should come off...

[Sabot]

I took the small one out and left the big one in on the RS and tighten it all the way but then it was opening on WOT so back to square one. I'm going to try something else tomorrow and let ya know.

[josephg15]

i took the small one out and kept the setting on soft...it feels good, but if i rev it up when the idle comes down it almost drops to zero...it might just be my tps. i also wanted more of a cherping noise from my bov...im not really digging the woosh sound. do you think i should turn it to hard?

[Sabot]

can't say but I have it all the way hard and it still opens under boost. So tomorrow I'm going to see if I could make the big spring harder and try that. It feels like the big spring need to be a little harder but adding the small one makes it too hard.

[josephg15]

i think im just going to live with this one for a while till i come up on a hks ssqv...anyways thanks everyone for letting me know about both springs in the bov...

[adrianfromthecastle]

im not really digging the woosh sound.

yeah, the rs is the wooshiest of the wooshes...

do you think i should turn it to hard?

you have to adjust it to your correct settings, you just gotta play with it till you get it right.

If its too tight, it wont release, but it wont stall. If its too soft, it will release, but it will stall.