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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > 335 BOV installed



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      10-03-2006, 10:24 PM   #1
jp335i
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335 BOV installed

I know many frown upon this mod but for those of you like me who can't have a boosted car without one...

It sounds great, honestly not as loud as i prefer... sound is well insulated under the hood but it still made me smile the first time i heard it. Install is just rough right now with a temp. welded pipe in there but i should have all the new permanent pieces in by the weekend.

No performance loss. No Check Engine Light. Replaced a factory rubber pipe so it can be uninstalled and put back to stock in minutes. Factory recircultaing valves are just diabled so it vents to the atmosphere instead of veeding back into the intake.
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      10-03-2006, 10:29 PM   #2
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should try to post some vid clips! how much did it all cost?
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      10-03-2006, 10:31 PM   #3
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Yeah!!!! post a vid or sound clip! "ppppppsssssssssshhhhhhhh"
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      10-03-2006, 10:32 PM   #4
jp335i
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Quote:
Originally Posted by 3thirty5
should try to post some vid clips! how much did it all cost?
Im a NEWB at posting vids... what the best way to host a video file I can create it and compress it no prob but then what?...

The BOV was $188 onlne but there are cheaper ones out there for sure. Another $100 buck in silicone couplers, clamps, alluminum pipe, flange and weld.
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      10-03-2006, 10:35 PM   #5
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VIDEO!!! if u need help, just film and send us the video thru email and we will host it.....there are a thousand places to host vids....we have to hear this one!! the first e92 modder actually starting to cross lines...nice!
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      10-03-2006, 10:36 PM   #6
aznevoviii
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so, basically you are using ONE BOV correct!? so, two factory BOV has been y-piped into single, and flange was welded on!?

c'mon man, let us know the secret!

if you have any pictures without BOV, BOV flange that you made, let us know too! thanks!!
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      10-03-2006, 10:50 PM   #7
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Quote:
Originally Posted by aznevoviii
so, basically you are using ONE BOV correct!? so, two factory BOV has been y-piped into single, and flange was welded on!?

c'mon man, let us know the secret!

if you have any pictures without BOV, BOV flange that you made, let us know too! thanks!!
The factory is one pipe coming from the drivers side of the intercooler and goes to the throttle body. In that same pipe there a two identical BOSCH redirect valves side by side that open when they see vacum and send the air back into the post airfilter pipes. One pipe is on the front of the motor feeding the forward most turbo and the other pipe runs along the firewall and feeds the other. Basically i left the factory valves in there just removed there vacume line and capped them off.

The pipe I fabricated looks awful but here is a pic of the one I purchased with the flange already installed. It is probably the best ebay find I have ever had . They are on there all day for $10 and it is honestly 10 times better that the one I had made using the Greddy Flange that costs $25 alone. But as usual, i couldnt wait so we fabricated one and then i ordered this once I saw that it was all working as planned. I will have to cut it down to 3.5" in order to fit in the current place but that wont be a problem.
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      10-03-2006, 11:01 PM   #8
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EWWWW i wanna hear it so badly=(!!!!!!!!!!!!!!!!!
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      10-03-2006, 11:02 PM   #9
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i would do the same if i had 335i.
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      10-03-2006, 11:03 PM   #10
jp335i
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I will record vid clip tomorrow at work and post if I can.
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      10-03-2006, 11:04 PM   #11
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Quote:
Originally Posted by shragon
i would do the same if i had 335i.
I wanna do it if i got a 335i too ( 2007 jan)
but putting a BOV on the 335, a 335i will become one of those jap car WRX or STI, Evo..etc....
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      10-03-2006, 11:06 PM   #12
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Lets hear it lets hear it.!
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      10-04-2006, 12:01 AM   #13
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Nice! Just wating on ur video
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      10-04-2006, 02:11 AM   #14
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video clip.. if not just sound clip.. pleaseeeeeeeeeee
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      10-04-2006, 02:23 AM   #15
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envy those blow off!
Anyway, I wanna hear the sound!
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      10-04-2006, 04:17 AM   #16
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does this void the warranty in any way???
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      10-04-2006, 04:33 AM   #17
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like everyone else, waiting to hear how it sounds! good work by the way.
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      10-04-2006, 07:22 AM   #18
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what is BOV, Blow Off Valves...if so, what sort of farting sound will it make? Is it just for audible pleasure or will it improve performance as well? I am a newb with this BOV thingy...
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      10-04-2006, 09:23 AM   #19
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I wonder how much HP you loose as the boost is vented during shifts?


BMW knows what they're doing, so you're sacrificing power for style (sound)

but hey it's your car so have fun.
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      10-04-2006, 12:38 PM   #20
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No HP loss for BOV, but of course no gain either. It's really just a safety measure (especially if he ends up increasing boost from other mods) to vent unwanted boost during shifts and/or decreasing speed. If there were no BOV or some sort of valve for releasing pressure you would have air being forced into the intake when you don't need or want it ie. slowing down.

While I'm talking about safety, two mods that I think would be a good idea is a turbo timer and perhaps an oil catch can. Turbo timer will keep the engine running for a set amount of time before shutting down to prevent oil cooking, which can damage the turbine and/or compressor.

The catch can will catch the blow-by oil from the PCV valve to the intake tract.
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      10-05-2006, 03:26 PM   #21
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video of jp335's BOV !!

http://www.e90post.com/forums/showthread.php?t=32376
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      10-05-2006, 08:20 PM   #22
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pipping is 3.5 inches!?
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