Wideband sensor location - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

doridoridori · 04-28-2017, 08:15 PM

I Have a quick question. So I have an no-name turbo downpipe, got a AEM UEGO and normally I figure to put the wideband where they have the O2 sensor bung, it goes right in of course. Recently someone was telling me that they mount the wideband further down the pipe and not too close to the turbo while i've read that some say it doesn't matter. I had never heard people mention putting the wideband bung further down the pipe before. Is it really that serious or will it read the same? I'd like to understand why, any help is much appreciated, thanks in advance!

bfellini · 04-29-2017, 12:11 AM

I usually drill out and weld the sensor bung to the downpipe in the straight section before the cat/test-pipe flange near where the tranny meets the block. For me, this had the most appropriate space to angle the sensor properly to reduce condensation... it's where I've mounted my personal AFR-500 4.9 sensor in my daily, and works for me...

The stock location, right off the turbo, can generate too much heat and a wideband sensor WILL NOT last as long, although the Bosch LSU 4.9 sensors are supposed to be more tolerant...

For a permanent installs, there's always some compromises, so a little further downstream from excessive heat will greatly improve the life of the sensor. Just pay attention to the angle the sensor is mounted, as advised in the AEM manual...

If you tell me which UEGO you got, I can add that to your base map, BTW and turn on closed loop for you if you want.

Kingtal0n · 04-29-2017, 12:47 AM

keep the wideband away from the turbo. high temperature changes the reading. It will read rich when it is lean if it gets too hot.

pay attention to the installation instructions. Follow the instructions.

doridoridori · 04-29-2017, 12:53 AM

Quote:

Originally Posted by bfellini

I usually drill out and weld the sensor bung to the downpipe in the straight section before the cat/test-pipe flange near where the tranny meets the block. For me, this had the most appropriate space to angle the sensor properly to reduce condensation... it's where I've mounted my personal AFR-500 4.9 sensor in my daily, and works for me...

The stock location, right off the turbo, can generate too much heat and a wideband sensor WILL NOT last as long, although the Bosch LSU 4.9 sensors are supposed to be more tolerant...

For a permanent installs, there's always some compromises, so a little further downstream from excessive heat will greatly improve the life of the sensor. Just pay attention to the angle the sensor is mounted, as advised in the AEM manual...

If you tell me which UEGO you got, I can add that to your base map, BTW and turn on closed loop for you if you want.

roger that thanks for the info i'll shoot you a pm about that

doridoridori · 04-29-2017, 12:54 AM

Quote:

Originally Posted by Kingtal0n

keep the wideband away from the turbo. high temperature changes the reading. It will read rich when it is lean if it gets too hot.

pay attention to the installation instructions. Follow the instructions.

thanks for the info, on an old turbo setup i had before i ran it right off the O2 sensor and had detonation when the afr's read perfectly fine this would explain a lot. Granted back then I had never knew about the wideband being too close being a bad thing so this definitely is good to know now.

tuzzio · 04-29-2017, 07:05 AM

AEM states it should be 36" from the turbo.

(see page 8 of this pdf)
http://www.aemelectronics.com/files/...GO%20Gauge.pdf

jr_ss · 04-29-2017, 12:26 PM

Typical wideband placement is 24" down stream of the turbo outlet. You can buy a heatsink if you choose to place the wideband closer to the turbo.. I have my wideband installed 8" from the outlet of my turbo and it has not caused any issues thus far. I'm not saying it's correct, but it has worked for me and there are many others that have run their WO2's inside of the recommended lengths.

derass · 04-29-2017, 03:51 PM

Did you read the instructions?

doridoridori · 04-29-2017, 06:21 PM

Quote:

Originally Posted by jr_ss

Typical wideband placement is 24" down stream of the turbo outlet. You can buy a heatsink if you choose to place the wideband closer to the turbo.. I have my wideband installed 8" from the outlet of my turbo and it has not caused any issues thus far. I'm not saying it's correct, but it has worked for me and there are many others that have run their WO2's inside of the recommended lengths.

I see, yea i think i'll run it further away when i get to the point where I get the exhaust finished up. I'll order a weld in bung and place it further back

doridoridori · 04-29-2017, 06:22 PM

Quote:

Originally Posted by derass

Did you read the instructions?

lost the box between moving so i couldnt at the time

cotbu · 04-30-2017, 10:13 AM

Heat is the reason. So depending on the fuel or egt, ie. race gas etc. should determine the distance beyond the recomended 18in down stream from turbo. Also there is a angle requirement as well. I believe these are mainly for permanent installs. One run shouldn't need an additional bung welded in duh.

Sent from my LG-H631 using Tapatalk

doridoridori · 04-30-2017, 05:47 PM

Quote:

Originally Posted by cotbu

Heat is the reason. So depending on the fuel or egt, ie. race gas etc. should determine the distance beyond the recomended 18in down stream from turbo. Also there is a angle requirement as well. I believe these are mainly for permanent installs. One run shouldn't need an additional bung welded in duh.

Sent from my LG-H631 using Tapatalk

well in order to place it further downstream i would need an additonal bung, why wouldn't i?

cotbu · 04-30-2017, 11:54 PM

If you are not permanently mounting the sensor, because you just want to tune or verify afr's or to just be a cool guy and feel what its like to have a wb afr gauge.

Ps those reasons are also listed in the manual that you were to lazy to look up the instructions for.[emoji41]

bfellini · 05-01-2017, 12:11 AM

Quote:

Originally Posted by cotbu

If you are not permanently mounting the sensor, because you just want to tune or verify afr's or to just be a cool guy and feel what its like to have a wb afr gauge.

Ps those reasons are also listed in the manual that you were to lazy to look up the instructions for.[emoji41]

Yeah the manual is freely available on the aem website with info on proper mounting and wiring...

Sent from my iPhone using Tapatalk

doridoridori · 05-01-2017, 03:03 AM

Quote:

Originally Posted by cotbu

If you are not permanently mounting the sensor, because you just want to tune or verify afr's or to just be a cool guy and feel what its like to have a wb afr gauge.

Ps those reasons are also listed in the manual that you were to lazy to look up the instructions for.[emoji41]

well in the event the sensor goes bad over time it would make sense to be able to loosen it than to have to cut through a weld to remove it and I wasn't too lazy, i wasn't aware, also why would they provide a bung if they didn't feel it was necessary? lol c'mon man

04-28-2017, 08:15 PM	#1
doridoridori Zilvia Junkie Join Date: Feb 2014 Location: cali Posts: 523 Trader Rating: (4) Feedback Score: 4 reviews	Wideband sensor location I Have a quick question. So I have an no-name turbo downpipe, got a AEM UEGO and normally I figure to put the wideband where they have the O2 sensor bung, it goes right in of course. Recently someone was telling me that they mount the wideband further down the pipe and not too close to the turbo while i've read that some say it doesn't matter. I had never heard people mention putting the wideband bung further down the pipe before. Is it really that serious or will it read the same? I'd like to understand why, any help is much appreciated, thanks in advance!

04-29-2017, 12:26 PM	#7
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,415 Trader Rating: (35) Feedback Score: 35 reviews	Typical wideband placement is 24" down stream of the turbo outlet. You can buy a heatsink if you choose to place the wideband closer to the turbo.. I have my wideband installed 8" from the outlet of my turbo and it has not caused any issues thus far. I'm not saying it's correct, but it has worked for me and there are many others that have run their WO2's inside of the recommended lengths. __________________ My SR20VET Does your VTC gear rattle in your S14/15 SR? PM me.

04-30-2017, 10:13 AM	#11
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Heat is the reason. So depending on the fuel or egt, ie. race gas etc. should determine the distance beyond the recomended 18in down stream from turbo. Also there is a angle requirement as well. I believe these are mainly for permanent installs. One run shouldn't need an additional bung welded in duh. Sent from my LG-H631 using Tapatalk __________________ LoverTechnologies "Half Broken Things!"

04-30-2017, 11:54 PM	#13
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	If you are not permanently mounting the sensor, because you just want to tune or verify afr's or to just be a cool guy and feel what its like to have a wb afr gauge. Ps those reasons are also listed in the manual that you were to lazy to look up the instructions for.[emoji41] __________________ LoverTechnologies "Half Broken Things!"

04-29-2017, 12:11 AM	#2
bfellini Zilvia Member Join Date: May 2005 Location: Eagle Rock, CA Posts: 167 Trader Rating: (6) Feedback Score: 6 reviews	I usually drill out and weld the sensor bung to the downpipe in the straight section before the cat/test-pipe flange near where the tranny meets the block. For me, this had the most appropriate space to angle the sensor properly to reduce condensation... it's where I've mounted my personal AFR-500 4.9 sensor in my daily, and works for me... The stock location, right off the turbo, can generate too much heat and a wideband sensor WILL NOT last as long, although the Bosch LSU 4.9 sensors are supposed to be more tolerant... For a permanent installs, there's always some compromises, so a little further downstream from excessive heat will greatly improve the life of the sensor. Just pay attention to the angle the sensor is mounted, as advised in the AEM manual... If you tell me which UEGO you got, I can add that to your base map, BTW and turn on closed loop for you if you want.

04-29-2017, 12:47 AM	#3
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 42 Posts: 4,829 Trader Rating: (17) Feedback Score: 17 reviews	keep the wideband away from the turbo. high temperature changes the reading. It will read rich when it is lean if it gets too hot. pay attention to the installation instructions. Follow the instructions.

04-29-2017, 07:05 AM	#6
tuzzio Post Whore! Join Date: Oct 2013 Location: Western Mass. Posts: 2,649 Trader Rating: (3) Feedback Score: 3 reviews	AEM states it should be 36" from the turbo. (see page 8 of this pdf) http://www.aemelectronics.com/files/...GO%20Gauge.pdf

04-29-2017, 03:51 PM	#8
derass Zilvia FREAK! Join Date: Jun 2010 Location: Toronto, ON Age: 37 Posts: 1,182 Trader Rating: (0) Feedback Score: 0 reviews	Did you read the instructions?