Blow Off Valve (BOV) on a 335i Coupe - BMW 3-Series (E90 E92) Forum

SnG · 08-22-2006, 10:47 PM

This is a NewB question, can we add a Blow Off Valve to the turbo on the 335i? or would it be a waste?

ward · 08-22-2006, 11:47 PM

please don't attempt to do that, save your $$ for some 24's

Hunter399 · 08-22-2006, 11:49 PM

lol

RichP · 08-22-2006, 11:58 PM

No, MAF based cars generally dont take well to blow-off valves.

Noone even has the car yet, lets take this one step at a time.

sillygoat · 08-23-2006, 02:06 AM

haha i asked this here too... on my post http://e90post.com/forums/showthread...&highlight=bov

i got a little more positive response but .... i think it will mess up the engine in the long run.. which would be all bad... but im pretty sure someone else will try it first... if it works then ill probably put one in too.

otherwise you can always get this http://www.takakaira.co.jp/accessori...ightpager.html

hahaha

///Matt · 08-23-2006, 04:30 AM

Blow off would sound cool, but hurt performance. There's a reason BMW didn't put one in at the factory.

pokerface · 08-23-2006, 09:05 AM

what was it that they put into the Audi turbos.. Diverter valves?

ksfrogman · 08-23-2006, 09:11 AM

Quote:

Originally Posted by sillygoat

otherwise you can always get this http://www.takakaira.co.jp/accessori...ightpager.html

hahaha

That's so funny. Those guys think of everything.

Ryan.M · 08-23-2006, 09:20 AM

Quote:

Originally Posted by ksfrogman

otherwise you can always get this http://www.takakaira.co.jp/accessori...ightpager.html

hahaha

That's so funny. Those guys think of everything.[/quote]

I need to install that on my 72' 2002

///Matt · 08-24-2006, 12:26 AM

I believe Audi veh's use bypass valves (or diverter) which, instead of blowing off boost pressure to atmosphere, it just dumps it back in front of the turbo, allowing it to get reused.

Matt

///Matt · 08-24-2006, 12:26 AM

PS...
I think this IS what BMW's using.

Matt

foofighter · 08-24-2006, 12:01 PM

audi and vw aftermarket started using HYBRID bpv/bov so you get the noise like all the hot rodding evo's and STi's.

i think it's annoying after awhile, heck if you put an intake on the 335 you'll be able to hear the bpv "sneeze" when you let off throttle.

AW330i · 09-13-2006, 02:16 AM

It is going to be really funny when everyone has a bov on their 335. I am sure that all of the evo drivers will be pretty confused for a minute or two. lol

06330i · 09-13-2006, 11:55 AM

the blow offs on the subarus sound like shit.

shiv@vishnu · 09-13-2006, 12:25 PM

FWIW, the 335i doesn't have a MAF senor. It uses MAP sensors instead. One in the intake manifold and one just before the throttle body in the IC charge pipe.

-shiv

ADHD · 09-20-2006, 10:14 AM

Quote:

Originally Posted by 06330i

the blow offs on the subarus sound like shit.

lolol...no way dude!! your just mad cause thats all you hear as your trying to focus on there tailights!

RichP · 09-20-2006, 10:32 AM

Quote:

Originally Posted by shiv@vishnu

FWIW, the 335i doesn't have a MAF senor. It uses MAP sensors instead. One in the intake manifold and one just before the throttle body in the IC charge pipe.

-shiv

Yeah, I saw that in your recent post.. probably the first BMW to ever use a MAP! (then again, not sure what they use on the diesels)

jasonn · 09-20-2006, 03:09 PM

yup, if it uses maf sensors, it will basically expect air to get back into the intake from a dv. However, a BOV is atmospheric so thus no air goes back into the intake causing a loss of power because the engine expected more air than what is really there. With a MAP, you can run a BOV safely and what not. The hybrid ones you mention is both recirc and atomospheric. Until high loads (more PSI) it shoots into atmos and under low load, it shoots into the intake. Btw, what you said about the STi BOV sounding like shit is all subjective. It's the brand of the BOV that makes the unique sound not the car.

fibercus · 09-24-2006, 06:19 PM

Quote:

Originally Posted by jasonn

BOV is atmospheric so thus no air goes back into the intake causing a loss of power because the engine expected more air than what is really there

I had Blitz dual stage 100% atmospheric BOV on my track toy before that I made recirculate it back into the stock recirc opening on the intake. Simple adapter and tubing. Sound was nice and sublte.

Used a MAF sensor and had no problems whatsoever, no stalling, rough idling, no afterburn / backfire between shifts, etc.

I would be suprised if the 335i doesnt have some sort of turbo protection for surges. But then again its wastegate is unlike what i've seen before - perhaps it accomplishes that in itself.

Rchan. · 11-14-2006, 03:09 AM

Quote:

Originally Posted by sillygoat

otherwise you can always get this http://www.takakaira.co.jp/accessori...ightpager.html

hahaha

08-22-2006, 10:47 PM	#1
SnG New Member Drives: Mercedes Join Date: Aug 2006 Location: Oakland Ca Posts: 4 iTrader: (0)	Blow Off Valve (BOV) on a 335i Coupe This is a NewB question, can we add a Blow Off Valve to the turbo on the 335i? or would it be a waste?
	Tweet

08-22-2006, 11:58 PM	#4
RichP Major Drives: P-Car Join Date: Jul 2005 Location: NYC Posts: 1,047 iTrader: (4)	No, MAF based cars generally dont take well to blow-off valves. Noone even has the car yet, lets take this one step at a time. __________________

09-13-2006, 02:16 AM	#13
AW330i Captain Drives: Alpine White 330i Join Date: Jun 2005 Location: Houston, Tx Posts: 881 iTrader: (0)	It is going to be really funny when everyone has a bov on their 335. I am sure that all of the evo drivers will be pretty confused for a minute or two. lol __________________

09-13-2006, 11:55 AM	#14
06330i fresher den you Drives: 2004 x3 Join Date: Feb 2006 Location: the shores, MI Posts: 990 iTrader: (0) Garage List 2006 E90, 330i [0.00]	the blow offs on the subarus sound like shit. __________________ 2004 x3, blue water metallic, sports pack, panoramic moonroof, xenon, hi-fi radio.

08-22-2006, 11:47 PM	#2
ward Lieutenant General Drives: F Join Date: May 2005 Location: T Posts: 6,184 iTrader: (0)	please don't attempt to do that, save your $$ for some 24's

08-22-2006, 11:49 PM	#3
Hunter399 Major General Drives: 11' E90 m3 Join Date: Apr 2005 Location: Houston, TX Posts: 7,723 iTrader: (29)	lol

08-23-2006, 02:06 AM	#5
sillygoat Captain Drives: 335i tiag Join Date: May 2006 Location: las vegas, nv Posts: 726 iTrader: (10)	haha i asked this here too... on my post http://e90post.com/forums/showthread...&highlight=bov i got a little more positive response but .... i think it will mess up the engine in the long run.. which would be all bad... but im pretty sure someone else will try it first... if it works then ill probably put one in too. otherwise you can always get this http://www.takakaira.co.jp/accessori...ightpager.html hahaha

08-23-2006, 04:30 AM	#6
///Matt United States Marine Drives: 2007 Dodge Ram 1500 Join Date: Jul 2006 Location: Los Angeles Posts: 2,769 iTrader: (8) Garage List 2006 330i [0.00]	Blow off would sound cool, but hurt performance. There's a reason BMW didn't put one in at the factory.

08-23-2006, 09:05 AM	#7
pokerface Major Drives: E90 325i / F25 x28i Join Date: Apr 2006 Location: Toronto Posts: 1,038 iTrader: (1)	what was it that they put into the Audi turbos.. Diverter valves?

08-24-2006, 12:26 AM	#10
///Matt United States Marine Drives: 2007 Dodge Ram 1500 Join Date: Jul 2006 Location: Los Angeles Posts: 2,769 iTrader: (8) Garage List 2006 330i [0.00]	I believe Audi veh's use bypass valves (or diverter) which, instead of blowing off boost pressure to atmosphere, it just dumps it back in front of the turbo, allowing it to get reused. Matt

08-24-2006, 12:01 PM	#12
foofighter Captain Drives: A POS MBZ Join Date: May 2006 Location: The OC Posts: 802 iTrader: (1)	audi and vw aftermarket started using HYBRID bpv/bov so you get the noise like all the hot rodding evo's and STi's. i think it's annoying after awhile, heck if you put an intake on the 335 you'll be able to hear the bpv "sneeze" when you let off throttle.

09-13-2006, 12:25 PM	#15
shiv@vishnu BimmerPost Supporting Vendor Drives: PROcede v5 Join Date: Sep 2006 Location: SF Bay, CA Posts: 14,656 iTrader: (0)	FWIW, the 335i doesn't have a MAF senor. It uses MAP sensors instead. One in the intake manifold and one just before the throttle body in the IC charge pipe. -shiv

09-20-2006, 03:09 PM	#18
jasonn JDM Slut Drives: 07 e90 335i Join Date: Feb 2006 Location: CA Posts: 3,879 iTrader: (11) Garage List 2007 335i [4.45]	yup, if it uses maf sensors, it will basically expect air to get back into the intake from a dv. However, a BOV is atmospheric so thus no air goes back into the intake causing a loss of power because the engine expected more air than what is really there. With a MAP, you can run a BOV safely and what not. The hybrid ones you mention is both recirc and atomospheric. Until high loads (more PSI) it shoots into atmos and under low load, it shoots into the intake. Btw, what you said about the STi BOV sounding like shit is all subjective. It's the brand of the BOV that makes the unique sound not the car.