Is a BOV on the 335 just an expensive noise maker?

dolby · 05-30-2007, 12:19 PM

Since I have not seen anyone post gains from adding one, why install it if it is just for the noise?

dolby

IMJUSS2NASTY · 05-30-2007, 12:23 PM

Maybe cuz some people like it.

Spool · 05-30-2007, 12:29 PM

I like BOVs

I feel every turbo'ed car should have one...

herbz · 05-30-2007, 12:50 PM

Quote:

Originally Posted by dolby

Since I have not seen anyone post gains from adding one, why install it if it is just for the noise?

dolby

why install one if its just for the noise? well you could also ask, why put on 19" wheels if its just for looks? why put a LSD when you will never push the car to the handling limits anyways? etc. etc.

some people just like being noticed. others don't. :dunno:

HyperM3 · 05-30-2007, 12:53 PM

Because I dont want exhaust and I still want people to know when I want to be "playful".

JOEVISTA · 05-30-2007, 12:55 PM

it's one of those deals you either like it or you dont no middle road on this subject

TwinBoost · 05-30-2007, 01:05 PM

I think the main reason why people get aftermarket blow off valves is due to the fact that the stock ones tend to leak when you start increasing the boost, Atleast that was the case with my wrx not sure about the 335i.

Bravo1 · 05-30-2007, 01:25 PM

The aftermarket BOV's on the 335 are currently just for the noise. That is the main reason why people upgrade them, but a beneficial reason for it would be a leaky valve. Even at 14 psi the chances of it leaking are probably pretty low, but when you start getting up to the 18+ psi range then the chances of it starting to leak increase a good bit. Does the 335 have a metal or plastic BOV?

Spool · 05-30-2007, 01:31 PM

here's my HKS

SoCal335i · 05-30-2007, 01:42 PM

Quote:

Originally Posted by Bravo1

The aftermarket BOV's on the 335 are currently just for the noise. That is the main reason why people upgrade them, but a beneficial reason for it would be a leaky valve. Even at 14 psi the chances of it leaking are probably pretty low, but when you start getting up to the 18+ psi range then the chances of it starting to leak increase a good bit. Does the 335 have a metal or plastic BOV?

2 plastic diverters.

Bravo1 · 05-30-2007, 02:00 PM

Quote:

Originally Posted by SoCal335i

2 plastic diverters.

Oh yeah if that is the case, then probably around 18 psi... +/- 2 psi they will most likely start to leak. They may hold up for a while, but eventually they will start to leak. Then again most people won't be able to tell until they have a boost gauge installed. Can show up as boost acting a little crazy... like boost spikes and so forth.

wj4 · 05-30-2007, 02:07 PM

From what I've read on this forum, the OEM plastic BOV's are fine for the boost level the 335i is making. But for other cars, such as an Evo, that boosts 19-21PSI stock, they upgrade the plastic BOV to a metal one, whether it is a VTA or circulated, to hold boost better.

So for the 335i, the VTA BOV would be for the sound.

BoostedBMW · 05-30-2007, 02:22 PM

If I read one more of these I might go insane.

BOV's were never designed to provide gains, they are made to handle higher boost pressure when diverter valves aren't up to the task. On the 335, the stock valves are fine so if you don't like the noise of a BOV then leave it stock. With that said, I happen to like the sound of a BOV on a turbo car and plan to put one on my car even though it is a BMW.

LOLrance · 05-30-2007, 04:59 PM

Quote:

Originally Posted by BoostedBMW

If I read one more of these I might go insane.

BOV's were never designed to provide gains, they are made to handle higher boost pressure when diverter valves aren't up to the task. On the 335, the stock valves are fine so if you don't like the noise of a BOV then leave it stock. With that said, I happen to like the sound of a BOV on a turbo car and plan to put one on my car even though it is a BMW.

+1!

judec · 05-30-2007, 05:05 PM

Quote:

Originally Posted by BoostedBMW

If I read one more of these I might go insane.

BOV's were never designed to provide gains, they are made to handle higher boost pressure when diverter valves aren't up to the task. On the 335, the stock valves are fine so if you don't like the noise of a BOV then leave it stock. With that said, I happen to like the sound of a BOV on a turbo car and plan to put one on my car even though it is a BMW.

IMHO that's the point: "even though it is a BMW". Not a boyricer civic, not a fast'n'furious type neon and subwoofer stuffed japanese bullshit, it's a BMW. Just because it got a turbo (or 2) ppl shouldn't treat it like this. It's a BMW. How could U drive the older models w/o BOV? Well, easily. They didn't even have a turbo. And did U get pu$$y? Well I bet U did. So?

dolby · 05-30-2007, 05:13 PM

Quote:

Originally Posted by TwinBoost

I think the main reason why people get aftermarket blow off valves is due to the fact that the stock ones tend to leak when you start increasing the boost, Atleast that was the case with my wrx not sure about the 335i.

Thanks...now that makes sense.

LOLrance · 05-30-2007, 05:16 PM

Remember that what TwinBoost posted was with his WRX not a 335. The 335 stock DV have been shown to be very capable of handling boost even with procede. Thats around what...14psi if i remember correctly. So unless you plan on going balls to the wall and running 18+psi, then yes....it is just a noise maker.

chbrules · 05-30-2007, 05:18 PM

BOV != performance gain

They simply relieve pressure on the engine when you suddenly let off the gas or upshift at a higher RPM. All turbo cars have them installed stock.

BoostedBMW · 05-30-2007, 08:05 PM

Quote:

Originally Posted by judec

IMHO that's the point: "even though it is a BMW". Not a boyricer civic, not a fast'n'furious type neon and subwoofer stuffed japanese bullshit, it's a BMW. Just because it got a turbo (or 2) ppl shouldn't treat it like this. It's a BMW. How could U drive the older models w/o BOV? Well, easily. They didn't even have a turbo. And did U get pu$$y? Well I bet U did. So?

I put in the "even though its a BMW" to poke fun at all of the threads that I read on here.

I've had a BMW in the past, and I just had a turbo jap car with a BOV so i've done it all. I just like the way that a BOV sounds, regardless of what car it is. Its not the end of the world, just do what makes you happy, and hope that the BOV gets you some ass too.

gmessori · 05-30-2007, 08:17 PM

A BOV in our car is not only a useless noise maker but it will also hamper performance. With the recirculating valve in there now, it will bleed off any excess boost, but will leave the system charged to reduce spool time. With a blow off valve every time you shift, you will get more lag as your turbos spool up. On an automatic it will be less noticable as the quick shifting leaves little time for the turbos to slow down, for 6 speeds the affects will be much more noticable.

astris · 05-30-2007, 08:19 PM

Quote:

Originally Posted by chbrules

BOV != performance gain

They simply relieve pressure on the engine when you suddenly let off the gas or upshift at a higher RPM. All turbo cars have them installed stock.

No, no they don't. The 335 does not. There is no performance benefit to having an aftermarket bov on a car that came with DVs. It's just for noise.

If you want to upgrade your plastic DV (I'm not sure if the 335 has diaphragm or piston style) upgrade them to aluminum, piston style DVs. Like the ones from Stratmosphere. I'm sure Forge will be coming out with some too.

itsbrokeagain · 05-30-2007, 08:35 PM

Quote:

Originally Posted by Spool

I like BOVs

I feel every turbo'ed car should have one...

Um every turboed car does have one?

Well the new ones at least.

05-30-2007, 12:19 PM	#1
dolby Second Lieutenant 50 Rep 262 Posts Drives: 2009 e90 M3 Join Date: Oct 2006 Location: Charlotte, NC iTrader: (0)	Is a BOV on the 335 just an expensive noise maker? Since I have not seen anyone post gains from adding one, why install it if it is just for the noise? dolby __________________ - 1998 E36M3/4 (retired) - 2005 E46 330i ZHP (totaled) - 2007 E90 335i Black/Blk/Alu Trim (retired) - 2009 E90 M3 - Jet Blk on Blk mDCT - 1987 E30 325is - track car conversion in progress
	Appreciate 0 Tweet Quote

05-30-2007, 12:23 PM	#2
IMJUSS2NASTY Banned 24 Rep 579 Posts Drives: BMW 335I MONTEGO BLUE Join Date: Dec 2006 Location: NYC iTrader: (0)	Maybe cuz some people like it.
	Appreciate 0 Quote

05-30-2007, 12:29 PM	#3
Spool ****** 670 Rep 6,169 Posts Drives: A few Join Date: Apr 2007 Location: DC Metro iTrader: (24)	I like BOVs I feel every turbo'ed car should have one... __________________ MKIV 6spd 1000hp Club
	Appreciate 0 Quote

05-30-2007, 12:53 PM	#5
HyperM3 Too many Alex's, from now on, call me Beaufort 398 Rep 6,189 Posts Drives: See Sig Join Date: Feb 2007 Location: Lawrenceville, NJ iTrader: (8)	Because I dont want exhaust and I still want people to know when I want to be "playful". __________________ 2020 R1250RS(Still have) 07 335i(gone) 97 M3(gone)
	Appreciate 0 Quote

05-30-2007, 12:55 PM	#6
JOEVISTA Private 4 Rep 96 Posts Drives: 335d blk/blk Join Date: Jan 2007 Location: boca raton,fl iTrader: (0)	it's one of those deals you either like it or you dont no middle road on this subject
	Appreciate 0 Quote

05-30-2007, 01:05 PM	#7
TwinBoost Private 1 Rep 53 Posts Drives: BMW 335i Join Date: May 2007 Location: Canada iTrader: (0)	I think the main reason why people get aftermarket blow off valves is due to the fact that the stock ones tend to leak when you start increasing the boost, Atleast that was the case with my wrx not sure about the 335i.
	Appreciate 0 Quote

05-30-2007, 01:25 PM	#8
Bravo1 Private First Class 1 Rep 114 Posts Drives: Accord Join Date: Sep 2006 Location: Lafayette, LA iTrader: (0)	The aftermarket BOV's on the 335 are currently just for the noise. That is the main reason why people upgrade them, but a beneficial reason for it would be a leaky valve. Even at 14 psi the chances of it leaking are probably pretty low, but when you start getting up to the 18+ psi range then the chances of it starting to leak increase a good bit. Does the 335 have a metal or plastic BOV?
	Appreciate 0 Quote

05-30-2007, 01:31 PM	#9
Spool ****** 670 Rep 6,169 Posts Drives: A few Join Date: Apr 2007 Location: DC Metro iTrader: (24)	here's my HKS __________________ MKIV 6spd 1000hp Club
	Appreciate 0 Quote

05-30-2007, 02:07 PM	#12
wj4 Major General 382 Rep 7,719 Posts Drives: E90 manual 335i Join Date: Nov 2006 Location: Burbank, CA iTrader: (8)	From what I've read on this forum, the OEM plastic BOV's are fine for the boost level the 335i is making. But for other cars, such as an Evo, that boosts 19-21PSI stock, they upgrade the plastic BOV to a metal one, whether it is a VTA or circulated, to hold boost better. So for the 335i, the VTA BOV would be for the sound.
	Appreciate 0 Quote

05-30-2007, 02:22 PM	#13
BoostedBMW Moderator 141 Rep 6,775 Posts Drives: TiAg E92 335 Join Date: Oct 2006 Location: Raleigh, NC iTrader: (14) Garage List 2003 S2000 [0.00]	If I read one more of these I might go insane. BOV's were never designed to provide gains, they are made to handle higher boost pressure when diverter valves aren't up to the task. On the 335, the stock valves are fine so if you don't like the noise of a BOV then leave it stock. With that said, I happen to like the sound of a BOV on a turbo car and plan to put one on my car even though it is a BMW. __________________ -Michael. Berlina Black S2000 CR is now in the garage l 19" Rial Daytona Race l KW V2 l Eisenhaus Race Exhaust l
	Appreciate 0 Quote

05-30-2007, 05:16 PM	#17
LOLrance The Law. 325 Rep 14,282 Posts Drives: BMW Join Date: Apr 2005 Location: SF / OC iTrader: (17)	Remember that what TwinBoost posted was with his WRX not a 335. The 335 stock DV have been shown to be very capable of handling boost even with procede. Thats around what...14psi if i remember correctly. So unless you plan on going balls to the wall and running 18+psi, then yes....it is just a noise maker. __________________
	Appreciate 0 Quote

05-30-2007, 05:18 PM	#18
chbrules MSVConrad++ 59 Rep 778 Posts Drives: E90 2006 325i \| E92 2007 335i Join Date: Dec 2006 Location: Peaches iTrader: (0)	BOV != performance gain They simply relieve pressure on the engine when you suddenly let off the gas or upshift at a higher RPM. All turbo cars have them installed stock.
	Appreciate 0 Quote

05-30-2007, 08:17 PM	#20
gmessori New Member 0 Rep 13 Posts Drives: BMW 335i Join Date: Feb 2007 Location: Palmdale, CA iTrader: (0)	A BOV in our car is not only a useless noise maker but it will also hamper performance. With the recirculating valve in there now, it will bleed off any excess boost, but will leave the system charged to reduce spool time. With a blow off valve every time you shift, you will get more lag as your turbos spool up. On an automatic it will be less noticable as the quick shifting leaves little time for the turbos to slow down, for 6 speeds the affects will be much more noticable.
	Appreciate 0 Quote