I have an 05 WRX and am looking to get a BOV for it with the flange. Let me know if you guys have anything....but one question too are they bad for your car or are they just not beneficial for it?
If they're adjusted properly they're just fine. Don't listen to everyone saying OMG THEY"LL KILL UR CAR!!!1!1one
BOV's: The stock valve is a recirculation valve. All of the air it bypasses gets sent right back into the intake and then into the engine. The thing is that it gets sent back into the intake after the MAF sensor so it's not actually measured. The ECU just assumes that it's getting all of that air back into the engine. So when you swap on an aftermarket BOV that vents all of that air into the atmosphere, obviously none of it's going back. However, the ECU doesn't know this so it's still injecting fuel for all of that air. This causes a brief rich condition every time the BOV does its thing. It's not really a big deal, but these are the side effects: -- slight hesitation while the car burns off that extra fuel. Most people can't even feel this and it depends a lot on your driving style. Certain BOV's are worse than others in this regard, but even the worst one isn't that bad so if you really, really need the psssshh sound you may want to just bit the bullet on this one. -- Afterfiring. This one you're going to have if you get an atmospheric valve. That extra fuel is going to burn in your exhaust, and it will cause a popping sound. If you're catless, it's gonna be fairly loud and might get annoying after a while. Some people like it, I found it annoying. If you have cats you may not really notice it, but that means the cats are destroying all of that extra fuel and are going to break down and need replacement sooner than they would otherwise. -- Idle problems. This I don't really attribute with a general BOV problem, it's really a problem with a poorly-tuned BOV. However, lots and lots of people have problems with the car's idle when they put an aftermarket valve on so it's gotta be mentioned. Obviously if your car doesn't idle right it's a big problem. Bottom line is that the stock valve is, by far, the best. The car runs and performs the best with it. It is good up to 18 to 20 psi. If you're running less, you DO NOT need to replace it. Anybody that tells you a BOV is a performance mod on the WRX is wrong. 50/50 and adjustable valves cause less problems than totally atmospheric ones, but the stocker still wins out for performance. It's even semi-noisy if you remove the intake silencer and pop a nicer panel filter like an ITG in there. I can hear mine echo off walls and stuff... copied from here...
^Ha!^ I say do it! I want one too, (ssqv, with inserts and block off, sorry to thread jack), and... I just want one cus they sound cool!
turboXS hybrid, on 02 WRX, no problem for 2000 miles, not whistling load, but you could hear it pretty good at about 2-5 psi. if you're like me who just don't wanna deal with adjusting to the right openings and have a good sound go with the hybrid.
yes comes with subaru flange, its in like new condicition in box, comes with everything that came with it new. pm me if your intersted.
