"The BIG BOV thread" (Where all bov question threads get merged) - Page 757
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This is a discussion on "The BIG BOV thread" (Where all bov question threads get merged) within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Originally Posted by domo34 i was wondering since my sti has a wastegate OMG I wish my WRX had one ...

  1. #11341
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    Quote Originally Posted by domo34 View Post
    i was wondering since my sti has a wastegate
    OMG I wish my WRX had one of these.
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  3. #11342
    Pro Manscaper Mikie13's Avatar
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    BOV has nothing to do with a built motor...it's all about the amount of boost it needs to hold. Stockers are good for just over 20psi...so unless you're getting protuned over Stage 2, or a new turbo or upping the boost significantly like that, you shouldn't even need to consider a BOV...and even then, the best bet is a BPV so that you still get a stock-acting system that vents back to the intake track.
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    Quote Originally Posted by GarrettKoonsman View Post
    Is this true?? I can't imagine the '11 valve is designed that poorly. 02-07 stock valves are good for more than that.
    It's not a design flaw...and the 02-07s hold to ~20 psi before they start to leak.

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    Registered User Abschatten's Avatar
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    Hey guys I just picked up a 2007 WRX and the blow off from the turbo is to quiet imo, I really enjoy the sound of a BOV, what would you guys recommend for a BOV thats decently loud and mean sounding.

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    Did you read even 1 page?

  7. #11346
    Pro Manscaper Mikie13's Avatar
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    Quote Originally Posted by synolimit View Post
    Did you read even 1 page?
    Was probably a merge...


    OP, read the first page now.
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  8. #11347
    Registered User Impreza2.0's Avatar
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    Quote Originally Posted by Abschatten View Post
    Hey guys I just picked up a 2007 WRX and the blow off from the turbo is to quiet imo, I really enjoy the sound of a BOV, what would you guys recommend for a BOV thats decently loud and mean sounding.
    A good short-ram intake will solve that for you (hopefully).
    I have been through a modicum of BOVs and hybrid types, I learned the hard way.
    First, BOVs mess with A/F ratio, so you will lose some power.
    Second, that sound is a pressure drop too rapid for the MAF to follow, so even with a tune, it's gonna get
    weaker the louder the valve is allowed to be (50/50 types try to "step" the release so that some
    reciprocated air can balance the A/F ratio.

    I tried:
    GFB 50/50
    GreddyRS BOV
    OBX Adjustable 50/50

    I now use:
    GreddyRZ with hotpipe on STi 2010 Intercooler...

    results....

    Zero sound, absolute throttle response.
    I get a kick out of spanking others with WRXs and STis which hiss at take-off...

    so do most of us who have tuned stock engines to maximum potential.

    Upgrade the turbo system to a larger compressor, etc... THEN you will NEED a VTA valve, there is no way a MAP needs that air.
    For as long as you are untuned and using the stock MAF, you won't benefit from a BOV.

    IMO, a nicely set up BPV is prettier than a BOV...

    that'd be my setup there... the Greddy bits can be setup as a BOV, and as a BOV it's THE loudest BOV horn made.
    Intercooler replacement gets you a better pressure-drop number (this equals throttle response/power).
    Save your clams for an IC and keep the stock BPV...
    when the boost gets close to 20psi during your mods, THEN consider the alternatives for valving it.
    It is VERY helpful during tuning to have a faster acting valve. It is in NO WAY helpful during tuning on a stock setup.

    Hope this helps!
    Last edited by Impreza2.0; 01-12-2012 at 04:37 PM.

  9. #11348
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    Talking Blow off vavle helppp

    I'm thinking about getting a blow off vavle in the near future. Thoughts on which one to get?
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    None. These threads will never stop.

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    Registered User Mitch89's Avatar
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    Call me crazy or not??

    So im looking into a new BOV/BPV to replace the stock on my 2011 wrx. All the sites you see are anywhere between $150.00 and even up to $350 bucks for a new one. Which isnt a big deal i dont want to cheap out on this kind of stuff. But then you get on ebay and see some of the "supposibly" same ones selling anywhere between $30 and $100 bucks. Same item description and everything so it says... My question is what the hell is the difference? or does ppl on ebay just put that on there and sucker ppl in to buying what they think is a name brand part when really its just a cheaper look alike. Just curious as to what you guys think...

  14. #11353
    Registered User GarrettKoonsman's Avatar
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    Just take off your stock one and leave that area open....+50HP according to my friend with a boosted Civic
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  15. #11354
    Registered User Mitch89's Avatar
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    Quote Originally Posted by GarrettKoonsman View Post
    Just take off your stock one and leave that area open....+50HP according to my friend with a boosted Civic
    haha for some reason i find that to be a typical answer for someone with a honda lol

  16. #11355
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    Get on the nasioc F/S threads. That is your best bet for used parts.

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