Solving the BOV issue

[TurboMan]

What up everybody... I'm a new member here at the forums, but I do have a major question that has yet to be definitively resolved, even after millions of searches on BOV, BPV, turkey, etc. and lots of conflicting results. Call me an idiot, or a moron, but i want the generic "whooshhhhh" sound coming from my MSP.

Does ANYBODY know how to get the regular BOV sound that almost every other turbo car known to man makes???

This is the common knowledge I have come across thus far for anyone who's interested:

1. The sound of the HKS SSQ generally sucks.
2. Running an open atm, aftermarket bov is probably not a good idea, unless you want to alter your driving style in order to avoid stalling.
3. Hard intercooler piping may help. (which i don't want to do)
4. The Injen intake may help improve the sound of the stock BOV.

These are the most viable/practical solutions I've come up with so far:
1. Recirculated Greddy Type S (I'm not sure if i need a flange in order to keep my warranty)
2. stock BPV with Injen intake

If everyone puts there head together on this issue, we can at the very least, come up with some hard facts. Feel free to correct or confirm some of my "common knowledge" if you're in the know! Give me the "WHOOOOSH" :0) (pics and audio/video clips would be very helpful)

[SpicyMchaggis]

my advice..stick your head out the window and make it with your mouth..thats what i do

[mp5jeff]

im pretty sure that the turkey sound comes from the wastegate not the bov, but i dont have a msp so i duno

[twiztedjeckel]

Originally posted by TurboMan
1. The sound of the HKS SSQ generally sucks.

i realize the actuall functionality and performance if you can even say that about a BOV come into play here but do you really think that if somebody didn't like the sound of a BOV they're going to put it on their car?

and besides,half the turbo cars i've seen run the HKS. must be because they all hate the sound that emits from it:rolleyes:

[DevilsSi1481]

yeah ive kinda given up on the whole BOV/BPV thing and also the whole "where does the turkey sound come from". MEH!!

[Flat Black]

Just get a TurboXS RFL and call it a day if you want PHOOOSH! that'll scare your neighbors!

[jred321]

Originally posted by mp5jeff
im pretty sure that the turkey sound comes from the wastegate not the bov, but i dont have a msp so i duno
can you explain how a wastegate would cause this sound? or why a wastegate would become louder after adding an intake, since they are on opposite sides of the turbo? i asked before in a thread because it made no sense to me and got no response, so hopefully you or someone can shed some light on this theory.
i vote for the location of the stock bpv being so far away from the intercooler pipe itself, and the noise being some air blowing past like the noise made on the top of a coke bottle if you blow across it, but i can't prove it.

[FBI14]

Originally posted by SpicyMchaggis
my advice..stick your head out the window and make it with your mouth..thats what i do

I couldnt help but laugh out loud when I read this and it was in the computer lab so everyone looked, Holy shit thats funny

[FBI14]

Originally posted by Flat Black
Just get a TurboXS RFL and call it a day if you want PHOOOSH! that'll scare your neighbors!

Will that BOV work with the MSP, can it be recirculated?

[TurboMan]

Jeckel:
I was not referring to the functionality of the HKS SSQ in other cars. I've heard it on a friend's WRX and it does sound very nice (it's a relatively high pitched whooooosh with a slight whistling). But for our SPECIFIC application, i would say that the general consensus is that it does indeed suck.

In other matters, i also am wondering about the effectiveness of the turbo xs bov (or bpv): can it be recirculated? and if so, will it still "whooooooooshhhhh" minus the turkey? (If anyone has some video or audio clips, please post)

I refuse to give up on my practical quest for the "Whooooooooshhhh" :o)

[Striker187]

ok here's the scoop:

1) the hks ssqv produces a very nice whistle. however, people have found that on the msp, you'll get a slight turkey sound to it along with the whistle. however, hard piping seems to help alleviate the problem (soundbombing has a recording posted somewhere). recirculated, the hks just plain sucks. if you don't believe me, go check out www.blowoffvalves.com. they have a vid of a celica running a recirculated hks.

2) The car was meant to recirculate. therefore, to make the car run as it should, you have to recirculate. you can alter your driving style and vent to atm. it's not hard to keep from stalling, it's up to you whether or not you want to deal with it. if you get an open air filter, you'll hear a recirculated bov just fine. case in point, the stock bpv. it's freakin loud with the injen.

3) perhaps. no conclusive evidence though.

4) most definitely. somebody posted a vid here in the msp forum with the injen. the stock bpv is really loud with it or any other intake for that matter.

5) most practical solution if you don't wanna void your warranty is to get a bov/bpv you can recirculate, a flange for the bov that you can run a hose to (if you're gonna use a bov), and that's pretty much it. just remove the stock one, put the new one in.

the greddy type s is probably the most sensible bov to recirculate. you should get a whistle with the greddy (however, i am not certain...it may be only if you push enough boost through it). If you want that wooosh sound, a turbo xs bpv may be your solution, but i'm not sure how they sound. if they sound like their bovs, then it's the whooosh you're looking for. if you vent to atm, bovs you wanna look at are the blitz, apexi, and turbo xs.

[Flat Black]

One of the best BOV makers in the world - GFB - Go Fast Bits. Look at their Mach I BOV for serious sound. Remember, all prices are in aussie money. Scroll down a bit for the Mach I.

http://www.autospeed.com/shop/category_638/browse.html

/members/Flat Black/1004200000tb.jpg

[Flat Black]

Oh, forgot to mention. If you scroll down more they have a hybrid BOV for Air metered cars like ours. You get the sound, and you still get to recirculate the air into the intake.

HYBRID!!!!!
/members/Flat Black/1004200010hi.jpg

[jrodhotrod]

Originally posted by Flat Black
Oh, forgot to mention. If you scroll down more they have a hybrid BOV for Air metered cars like ours. You get the sound, and you still get to recirculate the air into the intake.

HYBRID!!!!!
/members/Flat Black/1004200010hi.jpg


Now that thing is pretty looking! And if it works like they say it works that may be the solution We have been looking for.

Can you answer this question though:

"Comes with GFB Multifit Adaptor that attaches to 35mm ID rubber hose or with grub screws to a 25mm OD pipe on the inlet side. Comes with adapter to fit 30mm ID rubber hose on the plumb back side.

If this doesn't suit your vehicle, fittings are also available to suit 20, 25, or 30mm ID rubber hose on the inlet side, and 20 or 25mm on the plumb back side.

Special Offer - Free Hose Adaptors! When placing your order, use the comments section to let us know what size you need or what vehicle you have, and your GFB BOV will come with the proper inlet and plumb back hose adaptors factory installed"

What size hoses would we need if we ordered this?

[kazson]

yea the GFB hybrid bov is what im going to look into and some hard piping along with a injen intake. im very confident it should work. the WRX has the same issue with the BPV as the MSP does and tons of people ive found use this with no problems what so ever.

just keep in mind without the hard pipes and intake the GFB wont be very loud since it will be half venting and half recirulating.

On a side note. GFB also makes a BOV where you can manual set the Vent/Recirualte (i.e 60/40, 50/50, 70/30 etc)

[hazeXban]

Bumping this because this GFB sounds good..did anyone ever use it?

[505zoom]

...The sound of the HKS SSQ generally sucks.
... (pics and audio/video clips would be very helpful)

Yeah the HKS really sucks:rolleyes:

http://www.mazdamp3.com/members/505zoom/mov00533.mpg

[TiGrayMsp716]

You won't stall with all BOVs. The stalling is cause by some BOVs venting under vacuum.
I actually think that the turkey may be cause the the factory IC pipes. Anyone watch them expand under boost. My theory is when the pressure is vented the IC pipes go back to original diameter and volume. That could cause pressure to build back up in the pipes (now since the pipes are have a smaller volume) causing the valve to open again. Of course that partially based on that I haven't heard of anyone having the turkey with hardpipes. Or since we have so little boost that the spring may be to hard to open and tries to close.

[TiGrayMsp716]

I also have BOV that vent to atsmosphere with no stalling.

[Hypnotized]

Wait for the Forge BOV/BPV. The price should be around 150.

[TiGrayMsp716]

Thats what I have I was one of the testers.

[505zoom]

...I actually think that the turkey may be cause the the factory IC pipes...
Mine had the noise with hardpipes.


im pretty sure that the turkey sound comes from the wastegate not the bov, but i dont have a msp so i duno
Guys, the problem IS comp surge! It's not the piping, or the BPV, or the wastegate (if it were the wastegate, you would hear it when you hit max boost, not when you shift).

The Forge BOV is good because it vents/recirculates 50/50 so you get no stalling, but the BOV/BPV combo is still better because you are able to vent more air through 2 valves with seperate openings.

This is my last post that I will argue about this. I have already said everything I can to help you guys in the same way that I helped my own car.

If you guys can't listen to me and the others that are running the BOV/BPV, and still want a perfect BOV system, then go find a new method of fixing it that works better and is easier to fab.

[mazdaspeed75]

Yea 505 Is Right I Have The Dual Setup It Works And I Think It Sounds Sweetttttttt

[CustomMSP]

I have a single Mitsu. 1st Gen DSM BOV venting to atm. with a custom FMIC setup no stalling, but have my MAFs relocated on the pressure side. This way you can vent to atm. with out any problems. My BOV is located on the turbo-IC pipe not the ThrottleB-IC pipe. I got this idea from a few other member on this forum.

http://www.codewizz.com/MSP/bov.wav

[TiGrayMsp716]

The forge has two separate units. One recirculates, and one doesn't. I have the one that doesn't. The turkey sounds like compresure surge but I"m not really sure about whether it is.

[spacemonkey]

1. The sound of the HKS SSQ generally sucks.


I hope you didnt buy a turbo car just for the BOV? The HKS doesnt suck and the sound is one of my favorite...its diffrent and distinct cus almost every BOV is a loud woosh. I cant even tell the diffrence between TurboXS and greddy and etc. HKS is one of the best BOV you can get and there are inserts to change the tone to a lower frequency. Its one of the few BOV that can maintain high boost without leaks. Forge has the 2 piston BOV and a recirculating BPV. Both work with stockpiping...its the turkey flowed by a woosh.

505zoom: I will be getting forge BOV soon. Could you run Forge BOV with a after market BOV...kinda the stock BPV/BOV set up becasue you are still recirculating some of the air.

[505zoom]

...505zoom: I will be getting forge BOV soon. Could you run Forge BOV with a after market BOV...kinda the stock BPV/BOV set up becasue you are still recirculating some of the air.

Yes you *could*, but I don't know how well it would work as far as the stalling. It might not recirculate enough air to keep the car happy. I know that with my setup, you can barely even hear the HKS over the stock valve. The stock BPV when working properly and recirculating into the aluminum intake, is a loud ssshhhhhhh. The whistle that I hear from my car is very slight, and I have never picked it up with my video camera.

[spacemonkey]

505zoom:

Here is a clip of JDsam setup...how did he make the HKS SSQV sound so loud and without the turkey? I wonder if he was running the dual BPV/BOV setup

http://www.members.aol.com/jdmsamx/hksmspbov1.mpg (click on that if you want to hear what HKS sounds like)

I noticed his BOV is places on the hot pipe.

here is that thread: http://www.msprotege.com/vbb300/showthread.php?t=49929

[505zoom]

505zoom:

Here is a clip of JDsam setup...how did he make the HKS SSQV sound so loud and without the turkey? I wonder if he was running the dual BPV/BOV setup

http://www.members.aol.com/jdmsamx/hksmspbov1.mpg (click on that if you want to hear what HKS sounds like)

I noticed his BOV is places on the hot pipe.

here is that thread: http://www.msprotege.com/vbb300/showthread.php?t=49929

To be honest, I don't know why JDMSam's car does not have the same problem that many of us have had. He is running single HKS, no BPV. (dunno)

[MrDiggler]

My pre-owned MSP came with a TurboXS BOV already installed. I don't know which model it is or if it's recirculated. It does sound awesome though.