Blow Off Valve (BOV) on a 335i Coupe

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.

OpenFlash · 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 Registered 2 Rep 4 Posts Drives: Mercedes Join Date: Aug 2006 Location: Oakland Ca 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?
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08-22-2006, 11:47 PM	#2
ward Major General 159 Rep 6,158 Posts Drives: F Join Date: May 2005 Location: T iTrader: (0)	please don't attempt to do that, save your $$ for some 24's
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08-22-2006, 11:49 PM	#3
Hunter399 Major General 335 Rep 8,088 Posts Drives: F90M5 Join Date: Apr 2005 Location: Houston, TX iTrader: (33)	lol
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08-22-2006, 11:58 PM	#4
RichP Major 170 Rep 1,189 Posts Drives: F80 Join Date: Jul 2005 Location: CT 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.
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08-23-2006, 02:06 AM	#5
sillygoat Captain 63 Rep 804 Posts Drives: 335i tiag Join Date: May 2006 Location: las vegas, nv iTrader: (11)	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
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08-23-2006, 04:30 AM	#6
///Matt United States Marine 336 Rep 2,748 Posts Drives: 2007 Dodge Ram 1500 Join Date: Jul 2006 Location: Los Angeles 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.
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08-23-2006, 09:05 AM	#7
pokerface Colonel 444 Rep 2,531 Posts Drives: F25 X3 N20 / F80 ZCP Join Date: Apr 2006 Location: Toronto iTrader: (1)	what was it that they put into the Audi turbos.. Diverter valves?
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08-24-2006, 12:26 AM	#10
///Matt United States Marine 336 Rep 2,748 Posts Drives: 2007 Dodge Ram 1500 Join Date: Jul 2006 Location: Los Angeles 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
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08-24-2006, 12:01 PM	#12
foofighter Captain 71 Rep 840 Posts Drives: 2017 TRD Off Road 4r - 2018 M3 Join Date: May 2006 Location: The OC 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.
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09-13-2006, 02:16 AM	#13
AW330i Captain 85 Rep 876 Posts Drives: Alpine White 330i Join Date: Jun 2005 Location: Houston, Tx 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 __________________
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09-13-2006, 11:55 AM	#14
06330i fresher den you 36 Rep 986 Posts Drives: 2004 x3 Join Date: Feb 2006 Location: the shores, MI 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.
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09-13-2006, 12:25 PM	#15
OpenFlash 1806 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	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
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09-20-2006, 03:09 PM	#18
jasonn JDM Slut 143 Rep 4,233 Posts Drives: v Join Date: Feb 2006 Location: FL iTrader: (12) Garage List 2014 PORSCHE CAYMAN [10.00] 2013 BMW X1 [9.00] 2014 BMW X5 xDrive35i [9.00] 2013 PORSCHE 991 [10.00] 2007 BMW 335i [9.08]	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.
	Appreciate 0 Quote