"The BIG BOV thread" (Where all bov question threads get merged) - Page 172
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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; I have had my TurboXS RFL on for the past 10,000 miles (since 5k) and I still like the sound. ...

  1. #2566
    Official ClubWRX arms dealer SOUTHPAW's Avatar
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    Feb 2003
    I have had my TurboXS RFL on for the past 10,000 miles (since 5k) and I still like the sound. I do think its a little too loud though... Anyway, I have always noticed a ever-so-slight decrease in performance, like others, running rich, stumbling, shuddering at low rpm's.... I wish I could have the sound w/o all the bull$h!t but what am I gonna do? I wanna take it off but I'm so used to having it on for so long! It's kinda like removing that 15 pound tumor you've had on your face your whole life.....no wait, not really....
    *1969 Camaro - Kickin' It Old School

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  3. #2567
    Moderator YBNormal07's Avatar
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    I've got a fully adjustable, spring perch worxtuning recirculating BOV which is absolutely gorgeous (wrinkle red or blue finish with polished aluminum/ss.). Never had a problem with it, no stuttering, rough idle, etc. Great thing about it is I can adjust it easily so reduce the noise by recircing more air back to the compressor.

    It's distinct in sound, but not "look at me" loud. To me, it's the perfect balance between announcing to those that know...yep, it's a turbo" and to those that don't you won't be startling old ladies into dropping their shopping bags.

    Check em out. I highly recommend their service!!!
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  4. #2568
    Registered User 2003WRX's Avatar
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    Aug 2002
    I am running a Worx BOV as well, its been great! They are in development of a new adjustment ring that will make it louder. This particular BOV is awesome because you just turn the adjustment ring and you can go from 100% recirc to various levels of sound/vent.

    I tried the HKS once and it made my car run like crap. You'll find peoples experience with the HKS varies quite a bit. My car felt like I was towing about 500lbs after shifting gears... definite and noticable performance degradation. The guy I sold it to reported his car ran fine with the thing....
    2003 WRX Sedan
    2004 Nissan Xterra SE 4x4

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  6. #2569
    Registered User
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    Jul 2003
    KC, MO
    HKS here zero problems at all
    04 WRX Black no options!
    Helix up/downpipe, HKS catback & Bov, autometer gauges and MRT shortshifter, Bronze Rota SDRs, UTEC, tein SS coilovers, HKS type1 turbo timer, 6000K HIDs, JDM spec C front/rear lips, 20% tint
    to be installed: Mines Spoiler

  7. #2570
    Registered User veteq's Avatar
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    Jun 2003
    Ontario, Canada
    Thank you for all the feedback.
    Warranty is not a problem. Subaru will install it for me (this way ensuring the warranty remains). The wife wants the sound. My only concern was with loss of power...from what I read here, it's hit and miss. Making my decision that much more difficult.


  8. #2571
    Registered User
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    Nov 2003
    Typically the "Hit and miss" nature of an aftermarket BOV is due to the factory MAF sensor.

    On cars that use these sensors they are placed before the turbo, but the BOV vents into the intake after the sensor, so to make it easy to understand: If you have 10cfm of air going in, your MAF reads that and adds fuel for 10cfm, car works like normal, any air trapped before the TB when you shift is "recirculated" back into the intake stream and your stock car runs nice and fine

    If you have an Aftermarket BOV, you suck in 10cfm of air like normal, when you shift 5cfm gets dumped to the atmosphere (that makes the psss sound) but your engine has already added fuel for 10cfm... so your running super rich, that is what causes the stutter stumble effects, especially while shifting. Aftermarker recirculating valves dont typically have this problem since they function like stock.

    Ways around it, stand alone EMS, or things like an HKS VPC (Vein pressure converter) that measure air differently and later in the intake stream, instead of a "flapper" door style that measure air before the turbo(I believe that is what you have on your cars.) These measuring tools typically measure later in the intake stream (closer to the TB) and so it doesnt matter if you dump all but 1 cfm of air since it will only read 1cfm is going in the engine,

    FYI the HKS BOV is a very good BOV especially if you vent it back into your intake stream since the pressure holds the BOV closed instead of pressing against a spring like most standard BOV's that, if you have a weak spring, can cause leaking... and since its operated by a vaccum it opens and closes VERY fast, which is why it typically does not cause a reaction as extreme as other aftermarket spring type BOV's when shifting since you dont run as rich for as long.

    Last edited by Silverbane; 11-30-2003 at 10:47 AM.
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  9. #2572
    Registered User 20wrx02's Avatar
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    Oct 2002
    South East Mass

    BOV vent 100% or recirculate ? HELP

    hello peeps .. heres a dumb question you probably heard over and over.

    i have a turbo xs BOV that vents 100% to the atmosphere.

    im getting a greddy type s that can either vent 100% or the option of me attaching it so it circulates back into the intake.

    what should i do ? vent 100% or recirculate.

    whats the major difference besides noise ? ?

    engine mods ..

    injen intake
    colder sparkplugs
    borla headers
    hks uppipe
    hks downpipe
    blitz exhaust
    apexi avcr @15.5psi
    turbo xs tmic
    turbo xs unichip
    turbo xs bov
    CO2 intercooler chiller

  10. #2573
    Registered User BoostedBoxer's Avatar
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    Mar 2003
    If the bov isnt on recirculate, you will be running a little rich between shifts because the computer is expecting the recirculated air (that the 100% atmosphere bov vents to the atmosphere) back into the intake stream. You wont feel any difference in performance (i didn't between the 2 modes) or see it in gas milege.
    My Car is 100% STOCK!

    Originally posted by platano
    At 14???
    shoot , I'd hit it at current age, on roof of the car, with cousin driving , neighbor and town priest in the back seat, and that kid from "N.Korea" riding shotgun.

  11. #2574
    Registered User
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    Jul 2003
    How has the Blitz DD worked out for you?

    I am stock and am contemplating on getting one. Is it worth the sound? Any leaks?

  12. #2575
    Moderating YOU
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    Is there a new one out? Because I have the one on Blitz's website and it's also called the DD...
    Armin - ClubWRX Admin/Moderator since 2002
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  13. #2576
    God is offline
    Registered User God's Avatar
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    Aug 2001
    Detroit, MI
    It's not new. It's been out for a couple of years now. It's quite good though.
    Daniel Ponze, Lead Tuner Tuning Factory, Inc.
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  14. #2577
    Registered User WRXin''s Avatar
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    Jun 2002
    Houston, TX
    It's not as good as my HKS

    Floats like a butterfly and stings like when I pee!

  15. #2578
    Registered User Nexus6's Avatar
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    Jun 2002
    O.C., Ca
    My BLITZ is better.
    La Fee Verte
    Subaru 2002 Impreza WRX Sedan

  16. #2579
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    Jul 2003
    Have any of you had any problems running rich or loosing power with them?

  17. #2580
    Registered User Snowvert's Avatar
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    Mar 2003
    blitz working just fine. it's not all that loud, either.
    03 wrx - 300whp/270wtq
    Originally posted by zoophagy
    The people that work there are, for the most part, retards. I used to work there.

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