wideband question

followmylead · 10-26-2010, 07:09 PM

so which side of the turbo would be the better side for my wideband? or is it going to make a difference? i have a bung on both sides and would like to know if anyone has an answer.

thanks

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JTPerryR1 · 10-26-2010, 07:26 PM

After the turbo is better. Like 8" if possible

sense of nature · 10-26-2010, 11:28 PM

I have mine approx 4" off, in the downpipe, never had a problem AFR's r tight !

followmylead · 10-27-2010, 06:22 AM

in my 240 my wideband is after the turbo but the manifold runner length is much shorter than the subi. i appreciate your .02

followmylead · 10-27-2010, 07:13 PM

anyone else?

Fastenzeit · 10-27-2010, 07:18 PM

My AEM ugeo says bungs should be welded at a 10 degrees incline from horizontal position of the pipe to keep moisture contact away. I think its around 36" from the headers or 16" post turbo(around/before the curve of the dp and way before the cat)

JesseL · 10-28-2010, 12:27 AM

My wideband o2 sensor was aprox 3" from the turbo outlet, after burning up 2 o2 sensors in 3 months, I had another bung welded in near the oem 2nd, and I haven't had any troubles in the last few months on one sensor.

I should add that the wideband is an innovate, and when the sensors died they flashed the error code of "sensor to hot"

NSFW · 10-28-2010, 12:33 AM

Post-turbo for sure. The pressure in the up-pipe will throw off the readings otherwise.

I very much doubt that the people who advised putting the sensor 16" downstream of the turbo were thinking of Subaru's super-long pre-turbo exhaust plumbing when they came up with that guideline. Most downpipes that have bungs, have the bungs just a couple/few inches from the turbo.

For every person who blew through sensors like the previous poster, there's plenty running long-lived sensors right behind the turbo. Mine's been in place for about a year now and it's still working fine.

hot-j · 10-28-2010, 01:36 AM

36 inches is standard practice for any turbo application.

10-26-2010, 07:09 PM	#1
followmylead Scooby Newbie Member#: 238875 Join Date: Feb 2010 Location: St. Pete Florida Vehicle: 05 sti aspen	wideband question so which side of the turbo would be the better side for my wideband? or is it going to make a difference? i have a bung on both sides and would like to know if anyone has an answer. thanks * Registered users of the site do not see these ads.

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10-26-2010, 07:26 PM	#2
JTPerryR1 Scooby Specialist Member#: 163361 Join Date: Nov 2007 Chapter/Region: NESIC Location: RI Vehicle: 05 STI 10.22 @ 141	After the turbo is better. Like 8" if possible

10-26-2010, 11:28 PM	#3
sense of nature Scooby Guru Member#: 112759 Join Date: Apr 2006 Chapter/Region: MWSOC Location: In the V hole! Vehicle: 02 Srp STi... R ur Boltz to long????	I have mine approx 4" off, in the downpipe, never had a problem AFR's r tight !

10-27-2010, 06:22 AM	#4
followmylead Scooby Newbie Member#: 238875 Join Date: Feb 2010 Location: St. Pete Florida Vehicle: 05 sti aspen	in my 240 my wideband is after the turbo but the manifold runner length is much shorter than the subi. i appreciate your .02

10-27-2010, 07:13 PM	#5
followmylead Scooby Newbie Member#: 238875 Join Date: Feb 2010 Location: St. Pete Florida Vehicle: 05 sti aspen	anyone else?

10-27-2010, 07:18 PM	#6
Fastenzeit Scooby Newbie Member#: 253421 Join Date: Jul 2010 Location: Lake Oswego Vehicle: 03 WRX 325whp Sonic Yellow	My AEM ugeo says bungs should be welded at a 10 degrees incline from horizontal position of the pipe to keep moisture contact away. I think its around 36" from the headers or 16" post turbo(around/before the curve of the dp and way before the cat)

10-28-2010, 12:27 AM	#7
JesseL Scooby Specialist Member#: 169556 Join Date: Jan 2008 Chapter/Region: AKIC Location: Fairbanks Vehicle: 07' OPB STi BW S256 01' 2.5rs GM6 w/leather!	My wideband o2 sensor was aprox 3" from the turbo outlet, after burning up 2 o2 sensors in 3 months, I had another bung welded in near the oem 2nd, and I haven't had any troubles in the last few months on one sensor. I should add that the wideband is an innovate, and when the sensors died they flashed the error code of "sensor to hot"

10-28-2010, 12:33 AM	#8
NSFW Scooby Guru Member#: 140444 Join Date: Feb 2007 Chapter/Region: NWIC Location: Near Seattle, WA Vehicle: 05 Stage Free LGT ATP 3076, 6MT, AVO FMIC	Post-turbo for sure. The pressure in the up-pipe will throw off the readings otherwise. I very much doubt that the people who advised putting the sensor 16" downstream of the turbo were thinking of Subaru's super-long pre-turbo exhaust plumbing when they came up with that guideline. Most downpipes that have bungs, have the bungs just a couple/few inches from the turbo. For every person who blew through sensors like the previous poster, there's plenty running long-lived sensors right behind the turbo. Mine's been in place for about a year now and it's still working fine.

10-28-2010, 01:36 AM	#9
hot-j Scooby Newbie Member#: 260982 Join Date: Oct 2010	36 inches is standard practice for any turbo application.