How many guys running aftermarket BOV on their auto N54?

Yoko22R · 06-03-2011, 03:56 AM

I can get a good deal on one locally.. Was wondering if there were anyone with auto N54s that are running aftermarket BOVs?

s2k_335i · 06-03-2011, 07:08 AM

get one if you have a tune to hold boost!

redfox · 06-03-2011, 11:50 AM

why do you need after market BOV to hold boost? Mine holds boost just fine with my stock DVs.

ar design · 06-03-2011, 11:52 AM

I have a decent number of customers running them without issue.

BobS · 06-03-2011, 12:04 PM

Quote:

Originally Posted by redfox

why do you need after market BOV to hold boost? Mine holds boost just fine with my stock DVs.

I've been told that overtime the stock dv's won't be able to hold boost any longer and will slowly start leaking. Especially on higher boost cars. I run 16 psi peak on my GIAC st2 and have no issues with the stock dv's so far.

Syndicategt · 06-03-2011, 01:03 PM

1000's of people on this forum are running BOV's, just do a quick search. No they are not necessary, some like the sound and others (like me) have them for function. Stock DV's may or may not be the best for holding more than stock (8psi) boost, so you have 2 routes BOV's or Forge DV's.

KyLu II · 06-03-2011, 01:41 PM

A bov on an at is stupid.

BQTuning · 06-03-2011, 01:59 PM

Quote:

Originally Posted by KyLu II

A bov on an at is stupid.

Would you explain yourself why it is stupid ? Is the stock bov also stupid ?

Syndicategt · 06-03-2011, 02:07 PM

Quote:

Originally Posted by BuraQ

Would you explain yourself why it is stupid ? Is the stock bov also stupid ?

Stock BOV's do not exist, they are called Diverter Valves (DV's). What he ment was on an AT you need to let off the gas for it to open (making the whoosh sound). On an MT the BOV opens on every shift....because you let off the gas. Again, if you are going for performance and function, it makes no difference if you get upgraded DV's or BOV's, just get a quality BOV like Synapse TiAL or HKS.

s2k_335i · 06-03-2011, 02:30 PM

The stock charge pipe does not hold boost If you running 16 psi, ask me how I know. The BOV does not have any performance gain as stated by egt.

**335i** · 06-03-2011, 02:34 PM

bov is for sound only, Diverter Valves (DV's) for performance

Bakeme521 · 06-03-2011, 02:37 PM

Quote:

Originally Posted by **335i**

bov is for sound only, Diverter Valves (DV's) for performance

This makes me laugh.

KyLu II · 06-03-2011, 02:43 PM

Quote:

Originally Posted by Syndicategt

Stock BOV's do not exist, they are called Diverter Valves (DV's). What he ment was on an AT you need to let off the gas for it to open (making the whoosh sound). On an MT the BOV opens on every shift....because you let off the gas. Again, if you are going for performance and function, it makes no difference if you get upgraded DV's or BOV's, just get a quality BOV like Synapse TiAL or HKS.

Dis

KyLu II · 06-03-2011, 02:45 PM

Quote:

Originally Posted by **335i**

bov is for sound only, Diverter Valves (DV's) for performance

Quote:

Originally Posted by Bakeme521

This makes me laugh.

It's debatable...

**335i** · 06-03-2011, 03:09 PM

Quote:

Originally Posted by Bakeme521

This makes me laugh.

and why?

is it not true

Syndicategt · 06-03-2011, 03:27 PM

Quote:

Originally Posted by **335i**

bov is for sound only, Diverter Valves (DV's) for performance

Good god some of you people need to get permission to post on technical forums.

If BOVs are not for performance, then why does ER and Berk's racecars use BOVs? Show me hard evidence that DVs perform better.

tmdb335 · 06-03-2011, 03:55 PM

I am an auto and run a tial BOV with the stett charge pipe and love it. Hope that helps.

Brian135i · 06-03-2011, 04:00 PM

I have an HKS BOV, on my auto 135i.

ar design · 06-03-2011, 04:05 PM

Quote:

Originally Posted by **335i**

and why?

is it not true

BOV and DV both work the same on these cars, there is no MAF, so it doesnt make an ounce of difference.

UFhypz335 · 06-03-2011, 04:14 PM

Quote:

Originally Posted by **335i**

bov is for sound only, Diverter Valves (DV's) for performance

fucking oblivious person.

domrep · 06-03-2011, 05:26 PM

Quote:

Originally Posted by Syndicategt

Good god some of you people need to get permission to post on technical forums.

If BOVs are not for performance, then why does ER and Berk's racecars use BOVs? Show me hard evidence that DVs perform better.

+1. 335 you're such an idiot. my Bov holds boost way better than stock DV's. I've also had aftermarket DV's but i like the sound of the BOV. Stop saying stupid shit you dont even understand.

MKR_DmD · 06-03-2011, 05:39 PM

Just to sum everything up. Only reason to change it on an auto, is because the stock is no longer working. If you are looking for sound, you are SOL, and will only get some of it. Auto's don't close there throttle plate during shifts so technically there is nothing to blow off. On an Manual the throttle plate closes during shifts so you need to get rid of that extra air so it doesn't go back through the turbo.

06-03-2011, 03:56 AM	#1
Yoko22R Second Lieutenant 184 Rep 258 Posts Drives: E90 M3 Join Date: Jun 2011 Location: Irvine, CA iTrader: (2) Garage List 2008 BMW M3 [0.00]	How many guys running aftermarket BOV on their auto N54? I can get a good deal on one locally.. Was wondering if there were anyone with auto N54s that are running aftermarket BOVs?
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06-03-2011, 07:08 AM	#2
s2k_335i This is it!! 15 Rep 672 Posts Drives: FBO 335i without meth Join Date: Jul 2010 Location: Land of Freedom iTrader: (1)	get one if you have a tune to hold boost! __________________ DFW, TX. Current: 08' Cayenne GTS, 14' Boxster S, 12' CBR 1000', 04' Bayliner 2556 Sold: 2010 A4, 2008 335i, 2007 335i, 2006 M3, 2006 S2000, 1990 NSX, 1991 300zx, 1992 Supra, 1996 Prelude, 1981 CRX, 1980 Mustang.
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06-03-2011, 11:50 AM	#3
redfox INSTAGRAM: @yaasplease 166 Rep 1,023 Posts Drives: 2015 YMB M4 Join Date: Mar 2010 Location: Toronto iTrader: (4)	why do you need after market BOV to hold boost? Mine holds boost just fine with my stock DVs. __________________ 2015 ///M4: M/Vorsteiner Aero, P3Cars, HRE R101, Dinan S2, Coils & Intake; Eis/Akra Exhaust 2013 WRX Hatchback: LED Conversion, Blacked Out, Rally Armor 2015 Macan Turbo: Techart Exhaust, Cargraphics Lowering Module, Blacked Out
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06-03-2011, 11:52 AM	#4
ar design 295 Rep 4,408 Posts Drives: 04 M3 Join Date: Jan 2008 Location: Denver, CO iTrader: (9)	I have a decent number of customers running them without issue.
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06-03-2011, 01:03 PM	#6
Syndicategt Brigadier General 153 Rep 3,730 Posts Drives: 335i Join Date: Sep 2009 Location: Nor Cal iTrader: (11)	1000's of people on this forum are running BOV's, just do a quick search. No they are not necessary, some like the sound and others (like me) have them for function. Stock DV's may or may not be the best for holding more than stock (8psi) boost, so you have 2 routes BOV's or Forge DV's. __________________ 2008 BMW 335i e90 - Sold - Rob Beck Turbos / PROcede V5 / Aquamist HFS-4 / AR Downpipes / AE Exhaust / ER Comp FMIC / ER CP / TiAL BOV / Custom Intake / RPI Scoops / Quaife LSD / Swift-Koni Coilovers / DSS HS / Morr VS8.2 Sig Black / Michelin PSS / P3 Boost Guage / M3 body / M3 steering wheel / Adam's Rotors / Hawk HPS / SS lines /
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06-03-2011, 01:41 PM	#7
KyLu II FREE DREAMK 162 Rep 9,321 Posts Drives: the shiiit! Join Date: Aug 2009 Location: Vineland, NJ iTrader: (6) Garage List 2011 Lexus LFA [3.76]	A bov on an at is stupid. __________________
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06-03-2011, 02:30 PM	#10
s2k_335i This is it!! 15 Rep 672 Posts Drives: FBO 335i without meth Join Date: Jul 2010 Location: Land of Freedom iTrader: (1)	The stock charge pipe does not hold boost If you running 16 psi, ask me how I know. The BOV does not have any performance gain as stated by egt. __________________ DFW, TX. Current: 08' Cayenne GTS, 14' Boxster S, 12' CBR 1000', 04' Bayliner 2556 Sold: 2010 A4, 2008 335i, 2007 335i, 2006 M3, 2006 S2000, 1990 NSX, 1991 300zx, 1992 Supra, 1996 Prelude, 1981 CRX, 1980 Mustang.
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06-03-2011, 02:34 PM	#11
335i Colonel 184 Rep 2,320 Posts Drives: TOYOTA & 2008 E92 335i 6MT Join Date: Jul 2007 Location: Swiss iTrader: (4) Garage List 2008 335i [9.00]	bov is for sound only, Diverter Valves (DV's) for performance __________________ E92 335i Black Saphire 6MT PROcede V5, BMS DCI, Big Tom IC, AR CL-DP's 3", AR Design OC, Forge DV's, OEM M3 side skirts, BMW Performance Wheels 19 inch 269 Black Gloss+Continental ContiSportContact 5P (400hp and 550nm) https://www.youtube.com/user/aistis7..._as=subscriber
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06-03-2011, 03:55 PM	#17
tmdb335 Second Lieutenant 12 Rep 238 Posts Drives: 2009 335 xi coupe Join Date: Nov 2009 Location: boyds, md iTrader: (2)	I am an auto and run a tial BOV with the stett charge pipe and love it. Hope that helps. __________________ C6 procharged 600whp
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06-03-2011, 04:00 PM	#18
Brian135i Lieutenant 49 Rep 469 Posts Drives: BMW 16' M3 Join Date: Aug 2009 Location: Oxnard, CA iTrader: (1) Garage List 2009 BMW 135i [0.00]	I have an HKS BOV, on my auto 135i.
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06-03-2011, 05:39 PM	#22
MKR_DmD Lieutenant 6 Rep 494 Posts Drives: 16 Jeep Cherokee Join Date: May 2010 Location: Germany iTrader: (3)	Just to sum everything up. Only reason to change it on an auto, is because the stock is no longer working. If you are looking for sound, you are SOL, and will only get some of it. Auto's don't close there throttle plate during shifts so technically there is nothing to blow off. On an Manual the throttle plate closes during shifts so you need to get rid of that extra air so it doesn't go back through the turbo.
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