For the Love of Nissan Just recirculate the Bov - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jmac636 · 12-02-2008, 02:37 PM

For people that don't know:

Vented to atmosphere is not a good option for nissan tunes.
you will have running issues that can be easily remedied by a simple recirc hose.
believe me, i went vta at first and never again on the altima. reliability is on par with a non turbo setup, has great blow off sound still and runs like a champ - 11lbs all day long.
recirc it, youll be stubborn about it at first, but its the right thing to do and youll be much happier in the end.

this is stickied somewhere but here it is again.

From: "Ben Pila" <[email protected]>

To: <[email protected]>

Subject: Re: BOV Setup Information

Date: Mon 10/29/07 05:42 PM

At 05:35 PM 10/26/2007, you wrote:
Hey Ben, one more question I should have asked before... Is the JWT
tune designed with venting to atmosphere in mind or with
recirculation in mind? I currently have mine venting to atmosphere,
but Im hearing that I might have idle issues with that setup.
Thanks
Jay

Hi Jay,
The Nissan control system was not designed to run a BOV to
atmosphere. There is no way to make the ECU work with this as the
amount of air flow in the system that is lost if an atmospheric BOV
opens is an unknown amount to the ECU. Once the air flow comes
across the MAF sensor, the ECU expects all that air to be in the
system and adds the fuel based on this amount. So if you do not want
to have the stalling when coming to a fast stop and/or the rich
conditions between shifts, we recommend you run a recirculation type
valve (also known as a compressor bypass valve). It might be
possible to convert your existing valve to the proper type. Check
with the company that made your BOV for this. Note that the air flow
when recirculated, should dump back to the inlet side of the turbo
and ideally aim at the compressor wheel in the turbo inlet. This
also helps keep the turbo more responsive between shifts.

Best regards,
Ben Pila (Technical and Sales Support)
Jim Wolf Technology, Inc.
212 Millar Ave
El Cajon, CA 92020-4219
(619) 442-0680 Mon-Fri 8am-5pm PST
(619) 579-8160 24 hour fax
JIM WOLF TECHNOLOGY, INC. / NISSAN PERFORMANCE / NISSAN RACING /INFINITI PERFORMANCE

murda-c · 12-02-2008, 02:40 PM

I don't need a bov cuz my belts screech when i shift at 6.5k so everyone at school thinks i'm turbo.

s13 @ fullboost · 12-02-2008, 02:40 PM

Wow reminds me of the DSM forums

slider2828 · 12-02-2008, 02:41 PM

He wants that Ricey PPPOOOOOOOSSSSSSSSHHHHHHHHHHHHHHhhhhhhhhhh. what can we say....

allntrlundrgrnd · 12-02-2008, 02:57 PM

if you buy me the hks recirc adapter i will

rc1honda · 12-02-2008, 03:38 PM

Quote:

Originally Posted by slider2828

He wants that Ricey PPPOOOOOOOSSSSSSSSHHHHHHHHHHHHHHhhhhhhhhhh. what can we say....

QFT the sound is priceless. I think a lot of people beat the shit out of thier cars here and i don't really think a BOV will break something faster then driving the cars like we stole em.

rps13sr20det · 12-02-2008, 04:40 PM

in the long term...I won't see this making a difference

ZX88 · 12-02-2008, 04:45 PM

i just put the jdm tyte kazoo adapter on my greddy. problem solved./

HyperTek · 12-02-2008, 04:49 PM

blow thru maf before the throttle body ftw.. vent ur bov all day every day

Dutchmalmiss · 12-02-2008, 04:49 PM

If I ran atmospheric, I'd make it blow bubbles everytime I shift.

Flipzide · 12-02-2008, 04:53 PM

my s14 that i bought for track use came with an atmospheric setup and i'm too lazy to recirculate it :-P

allntrlundrgrnd · 12-02-2008, 05:25 PM

lol my friend taped a duck call on his sr for shits and giggles

LongGrain · 12-02-2008, 05:27 PM

my car runs like a top with vta. i dont see any point in recircing it.

WISH ONE · 12-02-2008, 05:33 PM

there isnt no point to this thread.. this is all you will ever need.

MetricHotrods.com · 12-02-2008, 05:35 PM

blow off valve? whats that? i just let it slam into the turbine at 1.2 bar. no, really. bov just leak boost and flutter. fuck em.

YoungGun · 12-02-2008, 05:37 PM

I have idle issues, but it sounds like my sr is cammed.

At stoplight

Mustang guy "That thing is pretty fast is it cammed?"

Me "No."

OMGLAWL

bejota180sx · 12-02-2008, 05:37 PM

Quote:

Originally Posted by HyperTek

blow thru maf before the throttle body ftw.. vent ur bov all day every day

aren't our mafs designed for draw-thru?? and using them for blowthru damages them? at least thats what ive read and heard from people who used to own blow-thru with z32 mafs...

HyperTek · 12-02-2008, 05:53 PM

worked out great when i had my sr20

bejota180sx · 12-02-2008, 06:03 PM

how did you run it like that? cause i want a blow-thru i just dont want to be burning up mafs regularly since z32 mafs are really hard to come by in PR and waiting for someone to post one up and hope its working fine is kinda shitty

BoostedCoupe · 12-02-2008, 06:04 PM

Quote:

Originally Posted by MetricHotrods.com

blow off valve? whats that? i just let it slam into the turbine at 1.2 bar. no, really. bov just leak boost and flutter. fuck em.

Im with this guy. I know alot of people on this forum dont run blow off valves either. To me aslong as you dont hit full boost than let off to let it surge over and over everyday than it wont hurt. Its those people that Hit boost in first gear in the middle of town just to let it surge that fucks their turbo's up.

MetricHotrods.com · 12-02-2008, 06:18 PM

most of the SR guys here just replace that one pipe you guys all attach the BOV to with a solid pipe, the upswept one on the side of the motor. sorry im not too SR savvy.

allntrlundrgrnd · 12-02-2008, 06:22 PM

i guess nissan and every other car manufacturer installed bypass valves for no reason?

get a clue

96Turbo · 12-02-2008, 06:25 PM

Quote:

Originally Posted by allntrlundrgrnd

i guess nissan and every other car manufacturer installed bypass valves for no reason?

get a clue

tru dat

OEM manufacturers do their research....and if a BPV wasn't necessary then you bet your ass they'd ditch it to save a couple bucks on every unit

jskateborders · 12-02-2008, 07:12 PM

get an hks ssqv. Never have to worry about running atmospheric/stalling.

96Turbo · 12-02-2008, 07:22 PM

Quote:

Originally Posted by jskateborders

get an hks ssqv. Never have to worry about running atmospheric/stalling.

why? It's still just an atmospheric bov...

ericcastro · 12-02-2008, 07:31 PM

So no blow off,
but counter the anti rice effects of this by getting a electric blow off noise thing from pep boys??

raz0rbladez909 · 12-02-2008, 07:35 PM

Quote:

Originally Posted by jskateborders

get an hks ssqv. Never have to worry about running atmospheric/stalling.

only if you get the recirc fitting, if not it's still going to stall no matter how minimal it is.

LongGrain · 12-02-2008, 07:43 PM

with the idle air hooked up you shouldnt have any trouble with stalling. my BOV has been vta since day 1 and the only time i ever had an issue was before i had the idle air tube hooked up.

now i have never once had an issue. runs like a dream.

DisEpyon · 12-02-2008, 08:48 PM

Quote:

Originally Posted by LongGrain

with the idle air hooked up you shouldnt have any trouble with stalling. my BOV has been vta since day 1 and the only time i ever had an issue was before i had the idle air tube hooked up.

now i have never once had an issue. runs like a dream.

im running a vta bov too, the only issue im having is that when coming to a stop my engine will start to bog down almost like the ecu wants to kill the motor, but then the engine will start to make its way to idle point, like mentioned above in the op email.

This idle air tube you are talking about, where is it located? (on the throttle body?) where does it hook up to? maybe this may solve my problem.

LongGrain · 12-02-2008, 08:52 PM

its a big tube, like maybe 1" or so, its on the TB i think, or maybe just the intake. i dont have my car here to look at it. but there should be a hose going from that to your cold pipe.

heres a pic of my motor, you can see the tube, just not really where it goes.

12-02-2008, 02:37 PM	#1
jmac636 Zilvia Member Join Date: Aug 2008 Location: huffman,tx Age: 48 Posts: 214 Trader Rating: (11) Feedback Score: 11 reviews	For the Love of Nissan Just recirculate the Bov For people that don't know: Vented to atmosphere is not a good option for nissan tunes. you will have running issues that can be easily remedied by a simple recirc hose. believe me, i went vta at first and never again on the altima. reliability is on par with a non turbo setup, has great blow off sound still and runs like a champ - 11lbs all day long. recirc it, youll be stubborn about it at first, but its the right thing to do and youll be much happier in the end. this is stickied somewhere but here it is again. From: "Ben Pila" <[email protected]> To: <[email protected]> Subject: Re: BOV Setup Information Date: Mon 10/29/07 05:42 PM At 05:35 PM 10/26/2007, you wrote: Hey Ben, one more question I should have asked before... Is the JWT tune designed with venting to atmosphere in mind or with recirculation in mind? I currently have mine venting to atmosphere, but Im hearing that I might have idle issues with that setup. Thanks Jay Hi Jay, The Nissan control system was not designed to run a BOV to atmosphere. There is no way to make the ECU work with this as the amount of air flow in the system that is lost if an atmospheric BOV opens is an unknown amount to the ECU. Once the air flow comes across the MAF sensor, the ECU expects all that air to be in the system and adds the fuel based on this amount. So if you do not want to have the stalling when coming to a fast stop and/or the rich conditions between shifts, we recommend you run a recirculation type valve (also known as a compressor bypass valve). It might be possible to convert your existing valve to the proper type. Check with the company that made your BOV for this. Note that the air flow when recirculated, should dump back to the inlet side of the turbo and ideally aim at the compressor wheel in the turbo inlet. This also helps keep the turbo more responsive between shifts. Best regards, Ben Pila (Technical and Sales Support) Jim Wolf Technology, Inc. 212 Millar Ave El Cajon, CA 92020-4219 (619) 442-0680 Mon-Fri 8am-5pm PST (619) 579-8160 24 hour fax JIM WOLF TECHNOLOGY, INC. / NISSAN PERFORMANCE / NISSAN RACING /INFINITI PERFORMANCE __________________ S14 Turbo LS1/t56 http://www.playloudclothing.com/

12-02-2008, 02:40 PM	#2
murda-c Post Whore! Join Date: Jan 2007 Location: Montgomery County, MD Age: 36 Posts: 3,198 Trader Rating: (1) Feedback Score: 1 reviews	I don't need a bov cuz my belts screech when i shift at 6.5k so everyone at school thinks i'm turbo. __________________

12-02-2008, 02:40 PM	#3
s13 @ fullboost Post Whore! Join Date: Dec 2007 Location: St.Petersburg,FL Posts: 2,550 Trader Rating: (15) Feedback Score: 15 reviews	Wow reminds me of the DSM forums __________________

12-02-2008, 02:41 PM	#4
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	He wants that Ricey PPPOOOOOOOSSSSSSSSHHHHHHHHHHHHHHhhhhhhhhhh. what can we say.... __________________ Turn and Burn!

12-02-2008, 02:57 PM	#5
allntrlundrgrnd Nissanaholic! Join Date: Jul 2007 Location: Portland, OR Posts: 2,483 Trader Rating: (17) Rides Gallery: allntrlundrgrnd Feedback Score: 17 reviews	if you buy me the hks recirc adapter i will __________________ https://www.instagram.com/kook_180sx

12-02-2008, 04:40 PM	#7
rps13sr20det Leaky Injector Join Date: Nov 2005 Location: calgary, AB Posts: 128 Trader Rating: (0) Feedback Score: 0 reviews	in the long term...I won't see this making a difference __________________

12-02-2008, 04:45 PM	#8
ZX88 Post Whore! Join Date: Oct 2005 Location: ATX Age: 36 Posts: 2,946 Trader Rating: (8) Feedback Score: 8 reviews	i just put the jdm tyte kazoo adapter on my greddy. problem solved./

12-02-2008, 04:49 PM	#9
HyperTek Post Whore! Join Date: Mar 2003 Location: Cali Posts: 13,224 Trader Rating: (3) Feedback Score: 3 reviews	blow thru maf before the throttle body ftw.. vent ur bov all day every day __________________ Keep it Classy

12-02-2008, 04:49 PM	#10
Dutchmalmiss Post Whore! Join Date: Apr 2003 Location: Socal (323) Age: 39 Posts: 3,501 Trader Rating: (14) Feedback Score: 14 reviews	If I ran atmospheric, I'd make it blow bubbles everytime I shift. __________________ Pignose, biaaatch.

12-02-2008, 04:53 PM	#11
Flipzide Nissanaholic! Join Date: Jan 2004 Location: San Diego, CA Posts: 2,011 Trader Rating: (5) Feedback Score: 5 reviews	my s14 that i bought for track use came with an atmospheric setup and i'm too lazy to recirculate it :-P __________________ D-Street.net \| bcuison.wordpress.com

12-02-2008, 05:25 PM	#12
allntrlundrgrnd Nissanaholic! Join Date: Jul 2007 Location: Portland, OR Posts: 2,483 Trader Rating: (17) Rides Gallery: allntrlundrgrnd Feedback Score: 17 reviews	lol my friend taped a duck call on his sr for shits and giggles __________________ https://www.instagram.com/kook_180sx

12-02-2008, 05:27 PM	#13
LongGrain Post Whore! Join Date: Sep 2006 Location: Midwest Posts: 2,741 Trader Rating: (5) Feedback Score: 5 reviews	my car runs like a top with vta. i dont see any point in recircing it.

12-02-2008, 05:33 PM	#14
WISH ONE Post Whore! Join Date: Aug 2006 Location: orange county ca Posts: 2,738 Trader Rating: (13) Feedback Score: 13 reviews	there isnt no point to this thread.. this is all you will ever need. __________________ PARTING/SELLING MY COUPE. PM ME.

12-02-2008, 05:35 PM	#15
MetricHotrods.com Leaky Injector Join Date: Oct 2008 Location: Japan Posts: 98 Trader Rating: (0) Feedback Score: 0 reviews	blow off valve? whats that? i just let it slam into the turbine at 1.2 bar. no, really. bov just leak boost and flutter. fuck em.

12-02-2008, 05:37 PM	#16
YoungGun Post Whore! Join Date: Nov 2007 Location: 818-951 SoCal Posts: 3,961 Trader Rating: (23) Feedback Score: 23 reviews	I have idle issues, but it sounds like my sr is cammed. At stoplight Mustang guy "That thing is pretty fast is it cammed?" Me "No." OMGLAWL

12-02-2008, 05:53 PM	#18
HyperTek Post Whore! Join Date: Mar 2003 Location: Cali Posts: 13,224 Trader Rating: (3) Feedback Score: 3 reviews	worked out great when i had my sr20 __________________ Keep it Classy

12-02-2008, 06:03 PM	#19
bejota180sx Zilvia FREAK! Join Date: Feb 2006 Location: Puerto Rico Posts: 1,173 Trader Rating: (5) Feedback Score: 5 reviews	how did you run it like that? cause i want a blow-thru i just dont want to be burning up mafs regularly since z32 mafs are really hard to come by in PR and waiting for someone to post one up and hope its working fine is kinda shitty

12-02-2008, 06:18 PM	#21
MetricHotrods.com Leaky Injector Join Date: Oct 2008 Location: Japan Posts: 98 Trader Rating: (0) Feedback Score: 0 reviews	most of the SR guys here just replace that one pipe you guys all attach the BOV to with a solid pipe, the upswept one on the side of the motor. sorry im not too SR savvy.

12-02-2008, 06:22 PM	#22
allntrlundrgrnd Nissanaholic! Join Date: Jul 2007 Location: Portland, OR Posts: 2,483 Trader Rating: (17) Rides Gallery: allntrlundrgrnd Feedback Score: 17 reviews	i guess nissan and every other car manufacturer installed bypass valves for no reason? get a clue __________________ https://www.instagram.com/kook_180sx

12-02-2008, 07:12 PM	#24
jskateborders Zilvia FREAK! Join Date: Apr 2007 Location: Tucson AZ Age: 36 Posts: 1,258 Trader Rating: (5) Feedback Score: 5 reviews	get an hks ssqv. Never have to worry about running atmospheric/stalling. __________________ "I am Norwegian, and are not familiar with your urban words :P"

12-02-2008, 07:43 PM	#28
LongGrain Post Whore! Join Date: Sep 2006 Location: Midwest Posts: 2,741 Trader Rating: (5) Feedback Score: 5 reviews	with the idle air hooked up you shouldnt have any trouble with stalling. my BOV has been vta since day 1 and the only time i ever had an issue was before i had the idle air tube hooked up. now i have never once had an issue. runs like a dream.

12-02-2008, 08:52 PM	#30
LongGrain Post Whore! Join Date: Sep 2006 Location: Midwest Posts: 2,741 Trader Rating: (5) Feedback Score: 5 reviews	its a big tube, like maybe 1" or so, its on the TB i think, or maybe just the intake. i dont have my car here to look at it. but there should be a hose going from that to your cold pipe. heres a pic of my motor, you can see the tube, just not really where it goes.