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BMW 3-Series (E90 E92) Forum
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BOV Cons
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09-14-2008, 06:36 PM | #2 |
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It is a semi-easy install. I would say just get a dual cone intake and you will get the sound you are looking for with an easier install/uninstall.
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09-14-2008, 07:02 PM | #3 |
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I have the dual cone intake and it gives me very nice sound and its not SOO loud and its not so quiet. You cna def. hear it.
And even my MOd friendly dealer suggested that BOV's are one of the mods i should try to stay away from for future warranty issues. Not sure why.
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09-14-2008, 09:08 PM | #4 | |
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09-14-2008, 10:40 PM | #5 |
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i heard that if we put a blow off on our cars it'll make it run rich in between shifts. also seen pics of the AA bov's opening covered in oil from a few months of usage.
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09-15-2008, 07:36 AM | #6 |
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This is my understanding (mostly from other turbo cars but i think it applies to ours): when the air gets to the turbo it has already been measured by the MAF so when the BOV vents the air to the atmosphere, there is less air in the system than what the ECU thinks should be there. Consequently there is fuel added for the "phantom air" which has just been let out and you are temporarily rich.
EDIT: Versus a stock recirculating valve which dumps the extra built-up pressure back into the intake. That way it still goes into the engine as the ECU expects.
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09-15-2008, 07:42 AM | #7 | |
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09-15-2008, 07:59 AM | #8 |
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Well if there's no MAF then I don't know why the engine would run rich. Never mind.
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09-15-2008, 04:52 PM | #10 | |
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I've not installed them on a 335 yet but I can't imagine they are very difficult to install (caveat- there's supposedly some plastic vacuum nipple that's easy to break when swapping them). Personally I find them really annoying- kinda like a 4" fart-can muffler on a stock civic. I guess you really gotta like the sound of a BOV.
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09-15-2008, 05:08 PM | #11 | |
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09-15-2008, 05:53 PM | #13 |
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I personally like the sound they make...and I already have the DCI setup..I've read that Vishnu recommends against them, mostly because the air is designed to recirculate back into the intake, and not be let out into the atmosphere.
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09-15-2008, 06:14 PM | #14 |
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09-15-2008, 07:20 PM | #16 |
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It is, but dual cones work better....
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09-15-2008, 08:01 PM | #19 | ||
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As for the sound, it is kind of addictive - like when your blowing the doors of an STI, SRT-8, etc but can also be annoying - like when your driving mother in law to dinner... Personally, I love it and I can't wait to put the cp-e/tial kit on my 335i. |
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09-15-2008, 09:52 PM | #20 | |
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This isn't to say that all bov/bypass vales are bad. I'm running Forge bypass valves on my car (with the softer spring) and they seem to work just fine. Of course, so do the stock ones. Shiv |
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