"The BIG BOV thread" (Where all bov question threads get merged) - Page 505
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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 Touge Daimao I am thinking of eventually getting the VF34 Turbo kit and I am wondering if ...

  1. #7561
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    Quote Originally Posted by Touge Daimao
    I am thinking of eventually getting the VF34 Turbo kit and I am wondering if this APS 50/50 will still be ok. Do i really need a BOV? Isn't the stock one good enough for the small boost upgrade? Oh, and what is an ssqv..or something
    as said earlier...stock bpv is good to 20 some psi....when you start hitting 20G levels or superzillas...or garrett turbos...then think about the APS unit. But if you have a VF-34 in mind then i doubt youll use the potential of the APS unit...so just stay stock

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  3. #7562
    Registered User Touge Daimao's Avatar
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    Thank you all for briliant advice...i apologize for not listening too well. I am actually doing this at work so i have very little windows of opportunity to read and respond.

    Thanks again everybody!!

  4. #7563

    Peachypumpkincheeks

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    Quote Originally Posted by Touge Daimao
    I actually didn't buy them myself...my kind brother picked them up cause I had mentioned to him a week ago that i was trying to decide what to do. I had changed my mind about the upgrade since you all gave me the great advice. I hope i didn't offend any of you, i really do appreciate all of your kind advice and helpful guidence. Thank you all...really!
    It's no problem, and you're not offending! We just want to help you so you don't run into any problems with your WRX down the road. I know we threw a lot of info at you, so it may take a bit to let it sink in.

    Oh, and it was nice of your bro to buy you a BOV, but you can sell it on ebay and buy a catless uppipe...you'll be happier!
    Heather | 2002 WRX | Stage 2
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    TastesLikeAwesome | @Subiestar

  5. #7564
    Registered User Touge Daimao's Avatar
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    okie, ummm, i'm not too familiar with the suby exhaust system...i know there is a downpipe and cats...what is the uppipe? will this conflict with emissions regulations? WHile we're on this topic, what should i avoid tinkering with in order to keep upgrading but not get snagged by emissions?

  6. #7565
    Registered User BlkWRXWag's Avatar
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    Quote Originally Posted by Touge Daimao
    okie, ummm, i'm not too familiar with the suby exhaust system...i know there is a downpipe and cats...what is the uppipe? will this conflict with emissions regulations? WHile we're on this topic, what should i avoid tinkering with in order to keep upgrading but not get snagged by emissions?
    What year is your car?
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  7. #7566
    Registered User Micah's Avatar
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    Quote Originally Posted by Touge Daimao
    okie, ummm, i'm not too familiar with the suby exhaust system...i know there is a downpipe and cats...what is the uppipe? will this conflict with emissions regulations? WHile we're on this topic, what should i avoid tinkering with in order to keep upgrading but not get snagged by emissions?
    The uppipe is what feeds your exhaust to the turbo - take a look below.


    On 2002-2005 WRX, the uppipe contains a cat, this creates restriction (it also serves the purpose of creating a cleaner exhaust... but we don't care about that - we want POWA!), which we can eliminate by installing an aftermarket piece, or by "gutting" the stocker. This change will improve turbo spooling by a few hundred rpm, and is generally considered a good first mod. There are still two more cats in place in the stock exhaust system, but yes, from a legal standpoint, you are degrading the performance of the emissions system.

    Check your local laws. In most areas - the law says that you can't touch the factory exhaust at all. However, you can usually get away with one highflow cat. If your inspection involves the OBDII port, then you will need "Ready" status on all your monitors. You may wish to look into MIL or CEL eliminators.

    You probably have more questions now than you did before. Don't let that discourage you. Keep asking questions, and people will keep telling you to search. It's all part of the process of learning when you are on a forum. Eventually you will learn to search before posting.
    Torch Red 2002 Chevrolet Corvette Z06 46k mi.
    Black 2002 Subaru Impreza WRX 6-speed 94k mi. my mod list
    10/08/2006 - 14.089@103.01 (5-speed with well worn clutch, no launch)
    "Six stars gleaming, five speeds breaking, four tires chirping, three differentials working, two liters screaming, one turbo boosting... it's what makes a Subaru all-wheel-drive, all we'll drive."
    for Bugeye owners my BOV thread Service Manuals

  8. #7567
    Registered User Touge Daimao's Avatar
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    I have an '04 WRX..wow, thanks for helpful diagram...are there any websites that have similar info...kinda like the chilton's manuals?

  9. #7568
    Registered User Touge Daimao's Avatar
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    I have an '04 WRX..wow, thanks for helpful diagram...are there any websites that have similar info...kinda like the chilton's manuals?

    I live in Maryland...does anybody know of any good shops to get mods done...or are they relatively simple so i can do them myself with basic tools?

  10. #7569
    Registered User Micah's Avatar
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    oh, and the reason you want to avoid putting a BOV on your WRX is because of the MAF system used by our vehicles. The MAF will read air passing, and add fuel, the BOV will let this air out, but the fuel will still go in. Now you've got way too much fuel(or not enough air), that will result in running extremely rich. When this happens, typically all of the fuel is not burned in the cobustion process and unused fuel is present in the exhaust. This causes a condition called "cylinder wash" where the fuel hits oiled parts and displaces the oil leading to an increase in friction and also heat. This can affect many things(I am not a mechanic, merely a car enthusiast - so I am not the ultimate authority on this, but I have been told the same thing by many differint mechanics) - two of which are rings being underlubricated from lack of oil, and also increased oil consumption.
    Torch Red 2002 Chevrolet Corvette Z06 46k mi.
    Black 2002 Subaru Impreza WRX 6-speed 94k mi. my mod list
    10/08/2006 - 14.089@103.01 (5-speed with well worn clutch, no launch)
    "Six stars gleaming, five speeds breaking, four tires chirping, three differentials working, two liters screaming, one turbo boosting... it's what makes a Subaru all-wheel-drive, all we'll drive."
    for Bugeye owners my BOV thread Service Manuals

  11. #7570
    Registered User PJO42387's Avatar
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    Quote Originally Posted by juanes287
    Buy the biggest possible BOV you can find. The bigger the BOV the more hp you will pick up. Then you should procede to make a gigantic pipe from the bov and angle it up through the hood of the car.
    The first three comments were all the guy needed.....He is new and doesnt know and hes not a ricer so i dont understand the reason for the sarcasm and rudness......So were you born knowing that BOV's are bad for subies....I figure you found out in July, right?

    this site pisses me off sometimes
    CGM

  12. #7571
    Registered User rallyrab's Avatar
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    listen to bov bashing

    i was very upset with myself after i found this site, im sorry to say but the first 2 mods to my car were a txs bov and a k&n cai, i know, im happy to say though, since after finding this site, i have happily taken both of these off my car, i would just like to take the time right now to influence others to not buy a bov for their wrx, i immediately felt a difference in idle and shift smoothness once removed, not to mention i wasnt backfiring after every shift, so if u were thinking of buying a bov, DON'T, instead put the money towards a nice tbe or maybe an ap, trust someone who has already had one, that wonderful noise does get old after a while



    oh and i have a txs type h bov with adapter kit for sale if anyones interested

  13. #7572
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    Nice. Good testimony and I would have been in the same boat as you if I hadn't done my research here
    2004 WRX Sti Cobb Stage 2
    GO COUGS!!!

  14. #7573
    Registered User Z_Spool's Avatar
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    Quote Originally Posted by Poekin
    did anyone else read the title and say to themselves "O man this poor kid"
    my eyes saw "BOV for stock 06 wrx," but my mind read, "Flame me!!! (details inside)"
    -Robert R.
    Touge Speed...

    oh SNAP son!

  15. #7574
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    So nice to hear, and it's nice to see a BOV thread that doesn't ask WHY they are bad . I did the same thing but only had the BOV on my car for about 2 days, couldn't stand the noise...not to mention my gas mileage was worse with it installed and there is NO need to have the "hey look at me, IVE GOT A TURBO" attitude....people know, no need to jam it in their face.

  16. #7575
    Registered User rr1911's Avatar
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    Quote Originally Posted by REXtard04
    So nice to hear, and it's nice to see a BOV thread that doesn't ask WHY they are bad . I did the same thing but only had the BOV on my car for about 2 days, couldn't stand the noise...not to mention my gas mileage was worse with it installed and there is NO need to have the "hey look at me, IVE GOT A TURBO" attitude....people know, no need to jam it in their face.
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