"The BIG BOV thread" (Where all bov question threads get merged) - Page 156
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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; nm i see what it is, but would i have to re map ecu with boost controller to operate safely? ...

  1. #2326
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    nm i see what it is, but would i have to re map ecu with boost controller to operate safely? etc..what performance diff will I see with a diff up/down pipe?

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  3. #2327
    Registered User fastwrx135's Avatar
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    If you ARE planning on upgrading your turbo, don't bother with a boost controller, just save your money for some sort of engine management later. If you DON'T plan on upgrading the turbo, then boost controller is fine. You will not have to remap anything. Just don't set it too high, maybe 15.5psi at the most.

    A catless uppipe and downpipe will give some pretty big hp gains. Im not sure what the exact numbers are but i believe it too be 40-50 crank hp. You will get faster spool of the turbo and better top end. In my opinion, go with an uppipe first, followed by downpipe then some sort of catback(HKS, Greddy are my preferred choices) You don't want to put a Boost Controller until you change the uppipe. If you raise boost, it will melt the cat on the uppipe and shoot pieces of the cat in your turbo which is bad.

    If im wrong in anyway here, please someone correct me.
    Hope this helps

    adam
    '03 PSM WRX Stg 4 <---SOLD
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  4. #2328

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    ITs an HKS SSQ BOV


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  5. #2329
    Banned Mili727's Avatar
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    Originally posted by WorldONE
    ITs an HKS SSQ BOV


    Final Answer...
    THANK-YOU.

    Now do you believe me?

  6. #2330
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  7. #2331
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  8. #2332
    Registered User the mike's Avatar
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    BOV the same?

    I was just wondering if the STi and the "plain" WRX use the same BOV. My girl saw an STi the other day and said it had more whistle to it. I dismissed it as aftermarket, but while I was standing on the dealers lot waiting for warranty work, I heard an STi go by. It too had a destinct whistle to it.
    Also, will the STi BOV fit on my EJ20? Hmmmmm...


    mike
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  9. #2333
    Registered User PlatinumWRX's Avatar
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    They are NOT the same internally. The STi BOV holds more boost. The fitment is the same, however.

    -Jim

  10. #2334
    Registered User the mike's Avatar
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    Thanks Jim. So theoretically it will fit? Not that i'm going to be replacing it anytime soon, I was curious about the sound.

    How's scenic Runnemede?

    mike
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  11. #2335
    Registered User renichms's Avatar
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    Fitment is the same as normal WRX. Also if you listen REALLY closely you can hear it, even though it's recirculating. I heard that if you swap stuff like the intake you can hear them more clearly too. It's also an easy swap, so aftermarket BOVs should be common...

    RN
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  12. #2336
    Registered User PlatinumWRX's Avatar
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    Originally posted by the mike
    Thanks Jim. So theoretically it will fit? Not that i'm going to be replacing it anytime soon, I was curious about the sound.

    How's scenic Runnemede?

    mike
    Yes, fitment IS the same.

    Runnemede sucks. The speed limits are too low, the traffic is horrible and I constantly worry about my car in the parking lot of my apartment complex.

    -Jim

  13. #2337
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    Easy project. Sounds great with the SUS
    04 STI
    FPGreen

  14. #2338
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    Thumbs up

    Looking good Matt... Love the details...

    I just bought a STi!!!

    Love it!!!


  15. #2339
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    bov question

    im selling my rsx type s to get a wrx because i love AWD turbo!! but had one question in mind. I plan to get cat back exhaust, and blow off valve as one of my first mods. are their any performance gains to a bov? and i heard u run slightly rich with bov and thus have carbon buildup...is that true?? and wuts the 50/50...like half atmospheric and half recirculate? someone please help me. i am a soon to be a fellow WRX owner
    jdm rules!!

  16. #2340
    Banned Mili727's Avatar
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    Re: bov question

    Originally posted by sanee515
    im selling my rsx type s to get a wrx because i love AWD turbo!! but had one question in mind. I plan to get cat back exhaust, and blow off valve as one of my first mods. are their any performance gains to a bov? and i heard u run slightly rich with bov and thus have carbon buildup...is that true?? and wuts the 50/50...like half atmospheric and half recirculate? someone please help me. i am a soon to be a fellow WRX owner
    BOV yields no performance gains. Yes you run rich. Yes 50/50 is half reciruculative and half atomspheric.

    You would be better off getting a downpipe/uppipe and your first mods.

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