E90Post
 


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



Reply
 
Thread Tools Search this Thread
      05-16-2011, 02:13 AM   #1
E90Vader
Banned
E90Vader's Avatar
Canada
50
Rep
631
Posts

Drives: 2007 335i
Join Date: Apr 2011
Location: Calgary

iTrader: (0)

BOV Necessary?

Just wondering if an aftermarket BOV is necessary for our cars?
once COBB comes out with there stage 2 tune, the boost will be quite high! Will a BOV increase performance or help the car in any way? Or is it just a gimmick for sound?

Not sure if the sound would even be noticeable on a Steptronic tranny?
Appreciate 0
      05-16-2011, 02:16 AM   #2
NiVeDh
Major General
NiVeDh's Avatar
United_States
426
Rep
8,003
Posts

Drives: '08 E90 335i, '99 E36 M3
Join Date: Apr 2009
Location: Houston, TX & Atlanta, GA

iTrader: (132)

Garage List
You won't be able to hear it over your straight pipe exhaust anyway.
Appreciate 0
      05-16-2011, 02:19 AM   #3
JayKay335i
Banned
Egypt
198
Rep
5,046
Posts

Drives: ///M323 DCT
Join Date: Apr 2009
Location: North Dakota; its best DUHHHHHH

iTrader: (1)

get diverter valves
Appreciate 0
      05-16-2011, 08:29 AM   #4
Penn999
Lieutenant Colonel
Penn999's Avatar
52
Rep
1,661
Posts

Drives: 335i coupe
Join Date: May 2010
Location: VA

iTrader: (3)

Quote:
Originally Posted by E90Vader View Post
Just wondering if an aftermarket BOV is necessary for our cars?
once COBB comes out with there stage 2 tune, the boost will be quite high! Will a BOV increase performance or help the car in any way? Or is it just a gimmick for sound?

Not sure if the sound would even be noticeable on a Steptronic tranny?
Its really your preference, I just like the sound. Anything is bettee than stock, exspecially if you have a tune and are running 14+psi
__________________
07' MT, Quaife LSD, BMW Performance LED Steering Wheel, HPF FMIC, AA BOV, HPF Exhaust, DCI, Procede V5, AR Stage 1 oil cooler, AR OCC, AR CL DP's, Vishnu Meth Kit, UUC SSK+DSSR, UUC Shift knob, (19 inch)VMR V715's/Yokohama Advan AD08's, Hartge Pedals and Floor Mats. Awaiting Install: M3 Rear Subframe Bushings, Full M3 suspension bits, AST 4100's, DSS axles. Future plans: Vishnu Single turbo kit
Appreciate 0
      05-16-2011, 09:30 AM   #5
X2Board
Lieutenant Colonel
X2Board's Avatar
United_States
450
Rep
1,643
Posts

Drives: I'm back, bitches! '13 E92 ZCP
Join Date: Feb 2011
Location: Wake Forest, NC

iTrader: (1)

Quote:
Originally Posted by NiVeDh View Post
You won't be able to hear it over your straight pipe exhaust anyway.


That was my first thought too.
Appreciate 0
      05-16-2011, 11:21 AM   #6
Syndicategt
Brigadier General
Syndicategt's Avatar
United_States
164
Rep
3,730
Posts

Drives: 335i
Join Date: Sep 2009
Location: Nor Cal

iTrader: (11)

Either a BOV or upgraded DV's will be able to hold higher levels of boost better than the stock DV's. But to answer your question, No, just adding a BOV will not increase power. You will hear it on the AT when you let off the gas pedal.
__________________
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 /
Appreciate 0
      05-16-2011, 11:42 AM   #7
Zeph
Major
United_States
29
Rep
1,410
Posts

Drives: 2008 E92 335i 6MT SGM CR/BD
Join Date: Jul 2008
Location: Southeast USA

iTrader: (0)

Quote:
Originally Posted by Syndicategt View Post
Either a BOV or upgraded DV's will be able to hold higher levels of boost better than the stock DV's. But to answer your question, No, just adding a BOV will not increase power. You will hear it on the AT when you let off the gas pedal.
+1 stock DV's are plastic with rubber diaphrams... I wouldn't even trust them on stage 1 much less stage 2! BOV's for sounds are really more noticeable in manuals

I would upgrade the charge pipe though, either way you go. The metal pipes seem to help with throttle response as opposed to the stock rubber/baffled hose. .02
Appreciate 0
      05-16-2011, 11:44 AM   #8
Willizm
Captain
Willizm's Avatar
26
Rep
610
Posts

Drives: 2009 335Xi and 01 Trans Am WS6
Join Date: Oct 2009
Location: Joliet, Il

iTrader: (0)

Yep, got a Tial BOV for the sake of not having to worry about my weak DV's leaking. ETS didn't have an option for DV's or I would have probably gone that route. On an AT car the sound isn't noticeable unless you are purposely goosing it and letting off.
Appreciate 0
      05-16-2011, 09:35 PM   #9
E90Vader
Banned
E90Vader's Avatar
Canada
50
Rep
631
Posts

Drives: 2007 335i
Join Date: Apr 2011
Location: Calgary

iTrader: (0)

Was not sure if the stock BOV was sufficient or if I really should look into a new BOV.
Thanks for the info guys.

I read somewhere that Charge pipes were not necessary.. People are starting to think they are needed as well!?
Appreciate 0
      05-16-2011, 09:50 PM   #10
Penn999
Lieutenant Colonel
Penn999's Avatar
52
Rep
1,661
Posts

Drives: 335i coupe
Join Date: May 2010
Location: VA

iTrader: (3)

Quote:
Originally Posted by E90Vader View Post
Was not sure if the stock BOV was sufficient or if I really should look into a new BOV.
Thanks for the info guys.

I read somewhere that Charge pipes were not necessary.. People are starting to think they are needed as well!?
you read wrong, as i said..its been tested that anything over 14ish psi and you are going to have a slight leak from the stock DV's. they werent designed to hold boost over 6-8psi. If you have a tune you are asking them to hold twice as much psi as they were designed to hold...
__________________
07' MT, Quaife LSD, BMW Performance LED Steering Wheel, HPF FMIC, AA BOV, HPF Exhaust, DCI, Procede V5, AR Stage 1 oil cooler, AR OCC, AR CL DP's, Vishnu Meth Kit, UUC SSK+DSSR, UUC Shift knob, (19 inch)VMR V715's/Yokohama Advan AD08's, Hartge Pedals and Floor Mats. Awaiting Install: M3 Rear Subframe Bushings, Full M3 suspension bits, AST 4100's, DSS axles. Future plans: Vishnu Single turbo kit
Appreciate 0
      05-17-2011, 01:14 AM   #11
Toker335i
Captain
Toker335i's Avatar
68
Rep
854
Posts

Drives: 335i/Sold--10" GTR
Join Date: Oct 2010
Location: Socal

iTrader: (2)

I got a er charge pipe with hks bov and i love it! Get it!
__________________
10' Solid Red GTR

08' 335i 6MT - Sold
92' NA 300ZX 5speed - Sold
06 IS350 - Sold
Appreciate 0
      05-17-2011, 01:15 AM   #12
Brey335i
Banned
118
Rep
4,771
Posts

Drives: e46 ///M3
Join Date: Oct 2009
Location: Austin, TX

iTrader: (11)

My stock charge pipe and DV's leaked a little... no problem after I upgraded
Appreciate 0
      05-17-2011, 08:59 PM   #13
E90Vader
Banned
E90Vader's Avatar
Canada
50
Rep
631
Posts

Drives: 2007 335i
Join Date: Apr 2011
Location: Calgary

iTrader: (0)

Whats the difference between a diverter valve and a BOV? How much do Charge pipes cost + install?
Appreciate 0
      05-18-2011, 01:36 AM   #14
PeteW84
COBB'ed
PeteW84's Avatar
United_States
65
Rep
2,228
Posts

Drives: 13 Mini Cooper S
Join Date: Apr 2008
Location: Tinley Park, IL

iTrader: (1)

Garage List
2008 335i  [7.56]
Quote:
Originally Posted by E90Vader View Post
Whats the difference between a diverter valve and a BOV? How much do Charge pipes cost + install?
The main difference between the two is that DV's divert/dump the air back to the charge pipe, your stock set up. Blow off valves, on the other hand release/dump the air into the atmosphere not the charge pipe, creating the wossshh sound. Some people like the sound, some don't...
__________________


13 Mini Cooper S
08 E92 335i (SOLD)
Appreciate 0
      05-18-2011, 09:42 AM   #15
Zeph
Major
United_States
29
Rep
1,410
Posts

Drives: 2008 E92 335i 6MT SGM CR/BD
Join Date: Jul 2008
Location: Southeast USA

iTrader: (0)

Quote:
Originally Posted by Pete84 View Post
The main difference between the two is that DV's divert/dump the air back to the charge pipe, your stock set up. Blow off valves, on the other hand release/dump the air into the atmosphere not the charge pipe, creating the wossshh sound. Some people like the sound, some don't...
I love the sound of some BOV's, like the Synapse... I like them as long as they don't squeel! I also like getting rid of the hot air and not re-using it. My wife, on the other hand, liked it better when it was "quiet and tame". Fortunately, it is my car.
Appreciate 0
      05-18-2011, 10:22 AM   #16
secretsquirrel
Colonel
secretsquirrel's Avatar
196
Rep
2,344
Posts

Drives: f80
Join Date: Dec 2010
Location: Far North Dallas

iTrader: (2)

Quote:
Originally Posted by Zeph View Post
Fortunately, it is my car.
Way to stand up for your man rights.

I'm also in the market for a BOV or DV. Sigh, more money..
Appreciate 0
      05-18-2011, 11:21 AM   #17
domrep
Captain
domrep's Avatar
Canada
43
Rep
993
Posts

Drives: AW E93 335i
Join Date: Mar 2009
Location: Toronto

iTrader: (3)

+1 on on synapse. no ricey whine.
Appreciate 0
      05-18-2011, 12:59 PM   #18
Brey335i
Banned
118
Rep
4,771
Posts

Drives: e46 ///M3
Join Date: Oct 2009
Location: Austin, TX

iTrader: (11)

BOV sounds better IMO, but the price is astronomical for a good setup with a charge pipe.
Appreciate 0
      05-18-2011, 01:04 PM   #19
Syndicategt
Brigadier General
Syndicategt's Avatar
United_States
164
Rep
3,730
Posts

Drives: 335i
Join Date: Sep 2009
Location: Nor Cal

iTrader: (11)

Quote:
Originally Posted by Zeph View Post
I love the sound of some BOV's, like the Synapse... I like them as long as they don't squeel! I also like getting rid of the hot air and not re-using it. My wife, on the other hand, liked it better when it was "quiet and tame". Fortunately, it is my car.
OMG I get into this argument every time she's in my car. "Your exhaust is too loud.....wah wah wah!" "Why would you do this to your car?"

I told her if I wanted a quite car I would have bought a Prius, silent under 5 mph

FYI, my exhaust isn't even loud.
__________________
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 /
Appreciate 0
      05-18-2011, 09:14 PM   #20
PeteW84
COBB'ed
PeteW84's Avatar
United_States
65
Rep
2,228
Posts

Drives: 13 Mini Cooper S
Join Date: Apr 2008
Location: Tinley Park, IL

iTrader: (1)

Garage List
2008 335i  [7.56]
Quote:
Originally Posted by Zeph View Post
I love the sound of some BOV's, like the Synapse... I like them as long as they don't squeel! I also like getting rid of the hot air and not re-using it. My wife, on the other hand, liked it better when it was "quiet and tame". Fortunately, it is my car.
The synapse sounds good, not too loud but definitely noticeable. Love mine, got the full synpse kit...
Attached Images
 
__________________


13 Mini Cooper S
08 E92 335i (SOLD)
Appreciate 0
      05-18-2011, 09:56 PM   #21
D335NUTZ
The Blue Beast
D335NUTZ's Avatar
China
143
Rep
5,665
Posts

Drives: 2008 E92 335xi in Montego Blue
Join Date: Jan 2011
Location: Queens, New York

iTrader: (8)

I got a Tial 50mm BoV for the sound. There's no performance difference between bov and dv.
__________________

Cobb AP Stage 2+ | BMS DCI | UR Catless DP | UR Chargepipe | Tial BV 50mm | BSH OCC | ETS FMIC | Eisenmann Race Exhaust | KWv1 Coilovers | Volk TE37 TC Kline Ed.
Appreciate 0
      05-18-2011, 10:01 PM   #22
Brey335i
Banned
118
Rep
4,771
Posts

Drives: e46 ///M3
Join Date: Oct 2009
Location: Austin, TX

iTrader: (11)

Quote:
Originally Posted by Wilazn View Post
I got a Tial 50mm BoV for the sound. There's no performance difference between bov and dv.
+ 1. Completely subjective
Appreciate 0
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 02:08 PM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST