My compressor bypass valve (BOV) mod
 

http://www.muller.net/sonny/tmp/bov-1.jpg
http://www.muller.net/sonny/tmp/bov-2.jpg

It sounds great! I used a 45 deg piece of 1" radiator hose (slips tightly over the stock hose), a filter from a Moroso catch can that I have for the CRX, and a battery post cap (red).

Sonny

Welcome to 1993.

Thanks. ;)

Sonny

:crackup: :crackup: :crackup:

I am still laughing at this thread.

:crackup: :crackup: :crackup:

there is no need for the filter. i vent mine straight to the engine compartment. not that it matters it is all for show/sound anyways. :D

Have fun cleaning up all that oil mist.. :)

Why did you put a filter on it? It blows air out, and since it just came out of the turbos it damn well better be filtered air anyway.

I put the filter on there because I read some posts in the archives about people having trouble with oil misting. I haven't had any trouble with misting, but I think a lot of it depends on whether or not your turbo seals are leaking.

Sonny

From experience on several FDs I've seen anywhere from moderate to pretty serious oil buildup from the misting.. I'd imagine aftermarket BOVs are the same way.. Not all cars do it I don't think, but it's rather common. :)

The factory BOV is open at idle and draws air so if you don't filter it you're pulling in unfiltered air. I verified this last night when I had the airbox pulled and started the car. You can easily tell the bov actually is an intake at idle.

I don't understand doing this "mod" though. Now you have a BOV that does exactly the same job the original BOV did except now it makes noise while doing it. I guess to some noise= teh hotness ;) I have to say this mod is no different than 5" resonated exhaust tips attached to stock mufflers...

Are all oem bovs positioned under the top line that goes into the airbox? For some reason, mine is connected to the top and not the bottom.

I see your Generation Y lessons are coming along nicely.
Lesson 2: Define "Bling Bling" in your own words.

;)

bling bling:

n. synonym for expensive, often flashy jewelry sported mostly by African American hip-hop artists and middle class Caucasian adolescents.
the sound light makes reflecting off of chrome

or
http://images.cardomain.com/member_i...9/478516_5.jpg

Mine actually blows a steady stream of air out at idle. :confused:

You sure? At idle the entire intake tract is under vacuum; it can't possibly do anything other than be closed and do nothing or be slightly open and pull air in. There's nothing but vacuum present at idle.

You sure you're not thinking of the air pump hose leading to the ACV? That one has pressure rather than vaccum at idle.

My Apexi BOV mists oil.....The spot directly above the BOV on the hood has a nice layer of oil on it along with the tubes under the BOV.

Not necessarily, most definately after the TB, but at idle, the turbos are still spinning and pumping some air into the rest of the intake tract. It can't go through the TB obviously, so it needs somewhere else to go.
Has anyone else tried this? Just pull your ABV/BOV off at idle and see if air comes out or if it sucks air in. Then we can figure out if DamonB's car is wacky or if it is mine. :)

Oh yeah, my ACV is long gone.

lol

Mine was blowing air, since even tough the UIM is under vaccuum the turbos are spinning, and don't let anybody fool you, even though they are spinning slowly cause you're at idle, they're still producing some airflow, since it is a tubine spinnig a fan... the exhaust gases are still creating pressure, it just doesn't get used...

it has to do with the height of your idle or amount of vacuum your engine pulls. The bov takes a certain amount of vacuum to open. Once there, if your turbos arent spinning fast enough to keep up with the vacuum requirements of the motor I guess air would enter the bov but if the turbos are spinning freely then it will put out some excess air. If they are just right then nothing noticeable will happen. When I blew the motor on my last fd it would put out a ton of air because I had the idle raised to 1400. After that was fixed it did nothing at idle. Im not sure my ported motor pulled enough vacuum to open it at idle. I could be wrong but this is what ive experienced

not a drop of oil coming out of mine. there is no oil not even in the BOV itself. If i remember right mine does blow a little air even at idle, but it has been a while since I did it.

I have an offtopic question, you see the big box in the right corner of the picture, the straight hose right next to the big ribbed one (for her pleasure i assume) what exactly is that? Mine came loose and i have it held on with black silicon for now, if you could answer my question i would be greatly appreciative. Thank you.

Edit: Its the bottom pic sorry for not being clear.

More like gen Z.

You mean it gets worse?:D

edit: for those unaware, I wasn't making fun of DamonB.

I'd say anyone who was born in 1980+ is gen Z.

i thought it was gen x?

Gen Y: http://en.wikipedia.org/wiki/Generation_Y
Gen Z: http://en.wikipedia.org/wiki/Generation_Z

Hopefully we can put this tangent to rest (which I am guilty of spawning) and get back to BOVs, which I'm sure everyone is dying to talk about... yet again.

\

?

example-mine is like this
___________
::::::1st line:::::[bov]:|air box |
::::::2nd line::::::::::: | |
|__________ |
--------------------------------------------------------------------
everyone's car I have seen is like this as in sonny's car-

::::::1st line:::::::::::::|air box |
::::::2nd line::::[bov]: | |
|__________ |

why is this?

"the whistles go wooooooooo"

It should actually not be sucking, well unless your turbos arn't spooling nicely... at idle, your engine should be running :D hence your turbos should be spinning and some air should be venting (not a lot but some positive pressure should be behind your bov).

in anycase, i have never ever heard of anyone popping their engine because they sucked in dirt from their bov, 99% of the people pop their engine because they run lean when they over boost.

surgemonster may be onto something with the amount of engine vacuum as my motor only has less than 30k on it but I will figure it out. My boost gauge is teed into the map sensor line. Just for fun I will take a spare gauge and tee it into the y-pipe and see what the turbos do at idle on my car.

On my car with the airbox removed and the air pump running the BOV and primary turbo inlet were pulling vacuum. The prespool dump and the secondary intake did nothing at idle.

hi. this is a little ot, and might sound a little stupid.
wich bow makes the pyssssssj sound and wich makes the wutututututuuu sound? dont make fun of me now,'

i have an unmounted turboXS H-RFL and am thinkin of putting it in

put it in and find out

Wanted to clarify my post about my BOV drawing in air at idle. I checked again this weekend when my stock airbox was out and my BOV does nothing at idle. If I cup my hand over the primary intake and provide a restriction however I can make the BOV pull in air at idle.

So my BOV does nothing at idle either. It won't pull air in unless there is a restriction in front of the primary intake.

that would make sense :D thanks 4 the feedback.

Seriously, enough with the BOV threads.