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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; The HKS sounds excellent but made my car run terrible. I sold it and bought the GFB and I'm running ...

  1. #1276
    Registered User 2003WRX's Avatar
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    The HKS sounds excellent but made my car run terrible. I sold it and bought the GFB and I'm running that in hybrid mode. I am VERY satisfied with the GFB. It is not nearly as loud or cool sounding though. It doesn't make any noise unless you really spool up the turbo, and when it does it sounds like a clean pssshhhh sound. The HKS had a cool squeal. One thing I didnt like about the HKS was that it released and made a fairly loud noise with even the slightest throttle release. I think it would have gotten annoying pretty quickly for my tastes. I'd recommend the GFB... got mine from mastrowrx.com
    2003 WRX Sedan
    2004 Nissan Xterra SE 4x4

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  3. #1277
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    02 Aspen White WRX Sportwagon

  4. #1278
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    i'm not sure about keeping the turbo spooled between shifts... i noticed much the opposite when using my stock bypass valve.

    i'm using the hks bov right now. it works great, but i also have most of a full exhaust installed (catback hopefully coming next week). there seems to be a weird correlation between how well a bov vents and how little backpressure you have. i have no clue why

    anyway... no stumble. rich condition? much less than a second. does it slow me down? nope. is it a big deal? hell no.

    on my completely stock exhaust i liked the oem bypass valve better. with my current setup (pde up and down) i absolutely hate the bypass. if i had more cash to simply throw around i'd be tempted to try out the greddy seq. unit just for fun.

    oh, and the hks can only be set up 100% atmos. or 100% recirc.
    05 STi...not stock

  5. #1279
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    you realize if you seriously wanted to, you could have simply adjusted the hks tighter so it didn't blow off till more boost was made? although if i was your compressor wheel i'd probably hate you for not venting any and all positive manifold pressure between shifts

    if you don't have any exhaust mods yet, i'd recommend holding off on buying a bov. get a little more oomph to back up the smack your bov will be talking.

    that said.... with my hks i don't exactly use my horn as much, as my bov is a lot louder i think it's time to install my air horns again.
    05 STi...not stock

  6. #1280
    Registered User chobits's Avatar
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    Originally posted by 2003WRX
    I'd recommend the GFB... got mine from mastrowrx.com
    do you have the sound clip for GFB?
    i always wanna buy that one, but i nobody has it here
    so i'm always wondering how good is the sound
    i'm not looking for a really loud one

  7. #1281
    Registered User LukeWRX's Avatar
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    Residue Venting from BOV?

    I just noticed a slightly orangish-brown residue being vented from my Forge 100% BOV. Just wondering if anyone knew what it was? I figured it was some kind of assembly deposits in the intake tract being vented out, because I put the BOV on after only 800miles on the engine.

    Thanks
    2004 STi

    Blitz DTT-DCII
    COBB Stage 2
    Invidia Catless DP
    HKS Hiper Cat-back
    Greddy: EGT, Boost, Oil Press Gauges
    Perrin Oil Catch Can

  8. #1282
    Registered User bdoug's Avatar
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    It's probably just some oil and residue. Looks like a good time to get a oil catch can.
    THE INTERNET: Where men are men, women are men, and the children are FBI agents.

  9. #1283
    Moderator aussieinstlouis's Avatar
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    Open up the BOV and check that it is the same colour as the lubricant in the BOV.

  10. #1284
    Registered User pondo's Avatar
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    You can turn it or place in spacers...I think for stock boost you should use 2 spacers...But i wouldn't swear to it!

  11. #1285
    Registered User pondo's Avatar
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    how many washers did you put ontop of the spring?


    cheers!

  12. #1286
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    Thumbs up Wow!

    Thanks to everyone on this board whose posts I searched and mulled over night after night until I decided to get my Forge BOV!
    Installed it this morning , very simple, and noticed no difference in how the car runs ( reffering to problems , that is) , but what a nice sound!Normal driving under 3k doesn't produce anything but get her into boost and there it is!
    Attached Thumbnails Attached Thumbnails dsc00671.jpg  

  13. #1287
    Registered User 2003WRX's Avatar
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    I dont have a sound clip of the GFB. I should make one though... cause before I bought it I searched EVERYWHERE and couldnt find one. It just sounds like a PSSSSHH noise... almost like something hydraulic (sp?). It is not all that loud but certainly audible both inside the car and out when it does blow off at full throttle. I passed a skate park the other day and was trying to get in front of another car and the thing blew off right in front of the place... I got a few cheears and some thumbs up. lol The car actually runs smoother with the GFB imo. I've already taken sh!t for that comment though, so dont bother. GFB claims it improves throttle response, etc and I cannt deny that.

    I realize I could have messed with the HKS a bit, but the car ran SO badly with it, I didnt even bother. I was worried about getting a 100% ATM valve in the 1st place and went against my better judgement. I sold it to a dude on NASIOC who said it ran great on his car, so thats cool. The GFB running hybrid was perfect for my needs. I wanted the sound, but only sometimes... and I wanted one that wouldn't make the car run badly... I'll be doing more engine mods as soon as possible. I bought the car in August 02 and only have 2700 miles though.. so I was getting ansy. I've dropped like $5K on appearance and was running out of crap I wanted to buy, so went for the GFB. I'll be doing the rest of the exhaust soon, and other mods to follow. I was thinking about the APS RT Spec most recently. Cobb tuning is 15 minutes from my house.

    That Forge valve looks awesome!
    Last edited by 2003WRX; 03-16-2003 at 02:42 AM.
    2003 WRX Sedan
    2004 Nissan Xterra SE 4x4

  14. #1288
    Registered User 2003WRX's Avatar
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    chobits, I'll attach a scan of the front page of the document that came with the GFB... it explains some stuff about the valve, etc. For what its worth...
    Attached Thumbnails Attached Thumbnails gfb.jpg  
    2003 WRX Sedan
    2004 Nissan Xterra SE 4x4

  15. #1289
    Registered User WRC_Obsessed's Avatar
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    Re: Wow!

    Originally posted by cohlineman
    Thanks to everyone on this board whose posts I searched and mulled over night after night until I decided to get my Forge BOV!
    Installed it this morning , very simple, and noticed no difference in how the car runs ( reffering to problems , that is) , but what a nice sound!Normal driving under 3k doesn't produce anything but get her into boost and there it is!
    good choice....i am just as happy .
    -Brian

    Twisty Monster - 335 ft/lb of torque @ 3600 rpm on a stock turbo. Is that possible? Yes it is.

  16. #1290
    Registered User LukeWRX's Avatar
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    hmm, just a "what if" : What If it is the lubricant in the BOV, would this be a defect in a seal in the BOV? or is it normal.

    THanks
    2004 STi

    Blitz DTT-DCII
    COBB Stage 2
    Invidia Catless DP
    HKS Hiper Cat-back
    Greddy: EGT, Boost, Oil Press Gauges
    Perrin Oil Catch Can

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