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Old 10-05-2012, 09:14 PM   #1
Bulldogg5
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Member#: 334027
Join Date: Oct 2012
Chapter/Region: Tri-State
Location: Long Island, NY
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White

Default Bov

Got a stock 2011 wrx want to get BOVjust for the now before I start any major work on the car. want to know if I have to get a recirculating one?
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Old 10-05-2012, 09:19 PM   #2
scx89
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obp

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do a search on BOV's
it's also in unabomber's manifesto
read it
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Old 10-05-2012, 09:25 PM   #3
HinshawWRX
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Default

Stop.

Read UNABOMBERS MANIFESTO (stickied in this section) right now.

Read it again.

Learn.

Put new smarts to use.

Simply, you don't need one AT ALL. At least not now. When the time comes, if ever, that your stock BYPASS VALVE fails, you will want to get a replacement BYPASS VALVE that recirculates into the intake.
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Old 10-05-2012, 10:49 PM   #4
Malin726
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I'm pretty sure there's another sticky up there that basically says that they're ok to use.
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Old 10-05-2012, 11:03 PM   #5
jimbosv650
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Quote:
Originally Posted by Malin726
I'm pretty sure there's another sticky up there that basically says that they're ok to use.
I'm pretty sure that there are probably hundreds of members here, myself included, who have at one point run a bov and can tell you they suck. Don't do it on a stock car. If you need the noise, change the intake. I don't know if you can modify the factory bpv on your year, but I did on mine and it makes quite a loud sound.
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Old 10-05-2012, 11:00 PM   #6
Thunderpaw
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Oh Lord...please search first. I know you're new but there is a ton of info about this. At least you posted a question about it before doing it
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Old 10-05-2012, 11:13 PM   #7
cpz1987
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Just did a bov on my car, and 1 week later I went back to stock. Yeah woohoo the sound is cool,but ur car will run like crap. Stay with ur stock and get a Cobb Sf intake if u want noise.
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Old 10-05-2012, 11:16 PM   #8
Napalm3nema
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All of you talking about 'get an intake' are leaving out the main component in that suggestion -

GET A TUNE FOR IT.

I agree on 'No' on the BOV, get an intake for some noise, but get a tune as well. (IT IS CRITICAL TO GET PROPER TUNES FOR ANY MODIFICATIONS TO THESE CARS WITH A FEW MINOR EXCEPTIONS) Then since you're doing all that, you may as well just get a downpipe and tune for all of that and be done with it.

Throwing a BOV on there will just cause you problems.
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Old 10-06-2012, 01:20 AM   #9
DONx3
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BOV and EWG should be priorities!








Just Kidding!
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Old 10-06-2012, 02:50 AM   #10
neo8222
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Until you boost over 20PSI stock valve is good to go. One of these days when I can stop buying parts for the car for a few months I would like to get a aftermarket BPV that can hold the boost I'm running, but for now I'm stuck with my BOV. Fair warning, buying upgrades gets addictive. A "simple turbo swap" for me turned into a major mod.
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Old 10-06-2012, 08:26 AM   #11
HinshawWRX
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Quote:
Originally Posted by neo8222 View Post
Until you boost over 20PSI stock valve is good to go. One of these days when I can stop buying parts for the car for a few months I would like to get a aftermarket BPV that can hold the boost I'm running, but for now I'm stuck with my BOV. Fair warning, buying upgrades gets addictive. A "simple turbo swap" for me turned into a major mod.
For any Subaru with a metal bpv, you can do a simple 5 cent modification that stops it from failing. 20 psi is low for the metal ones to fail though.

The plastic ones on the 08+ WRX's can be junk, but others have held just fine.
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Old 10-06-2012, 10:22 AM   #12
Barnold
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Dude, you guys are retarded. a BOV is the ONLY way to go.... jeez.... it makes a pshhhh sound and everything. you guys know the pshhh makes your car faster right? like when civics rev at you , you just make your car go pshhh! its just like sayin "pshhh your car aint ****, i got NOZ man. quarter mile at a time, thats how i live my life."

For real tho, BOVs get annoying as **** after 10 shifts...... dont do it unless its necessary man.
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Old 10-06-2012, 04:42 PM   #13
STi410
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please please please do yourself a favor and save that money and do not buy a BOV until you actually need one.
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Old 10-06-2012, 05:17 PM   #14
cvillesti
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welcome to nasioc haha. the subaru is designed with a pull through MAF and a bypass valve..not a blow off valve. so the way the system works is that when the throttle plate closes the valve opens and diverts the air back into the intake. it does this because the air is "metered" and your MAF has accounted for the air already. If you put a BOV you will be releasing this "metered" air and your car will run rich every time you let of the throttle. Rarely will you need to change the valve until you have quite a few modifications. If you get an intake (with a tune of course) you will hear the BPV and it will give you that sound you are looking for..i have the perrin BPV and its quite loud actually. the only time you would want to use a BOV in a subaru set up is if you change to a Blow through MAF set up and the BOV is pre-maf. I suggest that you take the money you were going to sink into a BOV and get a Cobb intake w/ an access port and do stage 1+. you will hear the turbo spool up and the bpv. the other thing you can do which requires no money is to remove the intake silencer from your stock air box, you will hear a little bit of the turbo and bpv that way also. hope this helps, happy modding!

Last edited by cvillesti; 10-06-2012 at 05:26 PM.
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Old 10-06-2012, 06:05 PM   #15
Barnold
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^ not trying to come across rude, just a friendly correction. There is no intake silencer on the 2011 WRX i think it stopped in 08?
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Old 10-06-2012, 09:02 PM   #16
swpshgnwgn
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Quote:
Originally Posted by Barnold View Post
^ not trying to come across rude, just a friendly correction. There is no intake silencer on the 2011 WRX i think it stopped in 08?
Interesting. I know when I took mine off on my 07 the turbo was loud as hell compared to stock. The 2011 that I have now is louder than my stock 07, but not nearly as loud as the 07 without the silencer. That was definitely a fun little mod
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Old 10-06-2012, 10:04 PM   #17
cvillesti
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Quote:
Originally Posted by Barnold View Post
^ not trying to come across rude, just a friendly correction. There is no intake silencer on the 2011 WRX i think it stopped in 08?
No problem..I have an sti, don't have a lot of experience with the wrx..I guess I just assumed
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Old 10-07-2012, 08:24 AM   #18
Barnold
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It's the same between the STI and WRX, no intake silencer
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Old 10-07-2012, 12:48 PM   #19
cvillesti
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Quote:
Originally Posted by Barnold View Post
It's the same between the STI and WRX, no intake silencer
I had one in my 2010 sti.
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Old 10-07-2012, 12:53 PM   #20
cvillesti
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Quote:
Originally Posted by Barnold View Post
It's the same between the STI and WRX, no intake silencer
I had one in my 2010 sti. I guess they have redesigned the intake.
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Old 10-07-2012, 01:06 PM   #21
NYC5
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I just bought an 11' wrx and it has a turboxs bov, i want the stock one back on. That "tsssss" sound gets annoying very quick.
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Old 10-07-2012, 02:28 PM   #22
Barnold
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I stand corrected 08+ wrx does NOT have an intake silencer, but the 08+ sti does.
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Old 10-07-2012, 04:42 PM   #23
the suicidal eggroll
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Quote:
Originally Posted by Barnold View Post
I stand corrected 08+ wrx does NOT have an intake silencer, but the 08+ sti does.
I can confirm that my '12 WRX did not have one.
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Old 10-07-2012, 09:23 PM   #24
Epsubie
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Instead of learning about my wrx I rushed and bought a bov then a week later learned about nasioc and read about this. Don't buy a bov , buy something else. Alot of these people are right even if they tell u in a dbag way lol
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Old 10-07-2012, 09:39 PM   #25
the suicidal eggroll
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Quote:
Originally Posted by Epsubie View Post
Alot of these people are right even if they tell u in a dbag way lol
LOL

Yes, we can be dicks sometimes. It mostly comes from seeing two things:
1) the same exact thread posted literally every other day
2) newbies asking for advice, ignoring it COMPLETELY, then complaining that their car runs like ****

It doesn't take a lot of this before we start to lose our minds. I try to take a break from the Newbie forum whenever this happens to me, but sometimes I forget, and sometimes other people forget too, and you end up with completely over-reactive psychopath answers to relatively simply questions. It helps to have a thick skin here. If you can get past the bull****tery, there is an absolute goldmine of knowledge on this forum. As much as I know, I'm still in awe of the knowledge of many other members here.
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