Wideband A/F guage - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

rdavis · 07-04-2018, 07:37 PM

I was wondering that since my rear O2s are turned off, could I use one of t the bungs for a wideband O2 sensor, or is it too far down stream. I do not have cats at the moment. Thanks in advance.

eLeSthree · 07-04-2018, 08:04 PM

Most widebands will tell you in the installation instructions where they prefer to be placed. Like 18-30 inches downstream for example. I think that second bung may be too far. I had one welded in a few inches before my first o2 sensor inside the header collector, and slightly offset so it didn't block the airflow of the stock one.

It only cost me $40 for the weld job.

StingrayblueSS · 09-30-2019, 12:28 AM

I have the same question about using the o2 sensor location for the wideband. I'm also catless with long tube headers.

Sparko · 09-30-2019, 01:43 AM

Quote:

Originally Posted by StingrayblueSS

I have the same question about using the o2 sensor location for the wideband. I'm also catless with long tube headers.

If you're installing a wideband, it's to accurately monitor the combustion mixture as it's exiting the cylinder. As the gas flows through the system it continues to react and begins to condense. If you do not install the sensor where it is designed to be placed you are not reading the gas as it is intended and designed and will not have the accuracy it should. Enough options for an inexpensive installation exist, seems like a silly place to try to cut a corner.

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StingrayblueSS · 09-30-2019, 03:50 AM

Quote:

Originally Posted by Sparko

If you're installing a wideband, it's to accurately monitor the combustion mixture as it's exiting the cylinder. As the gas flows through the system it continues to react and begins to condense. If you do not install the sensor where it is designed to be placed you are not reading the gas as it is intended and designed and will not have the accuracy it should. Enough options for an inexpensive installation exist, seems like a silly place to try to cut a corner.

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Yeah I just thought I'd ask. There aren't many good muffler shops around that I would trust to weld in my car.

FasNuf · 09-30-2019, 06:54 AM

Just follow the directions of the manufacturer. You do want to put it in a place where all the gasses from the primaries converge, not just in a single primary. Make sure the sensor is clocked in such a way as to allow condensation from start up to travel away from the sensor, not pool into the sensor.

Juiced1 · 09-30-2019, 08:44 AM

The rear O2 sensor bungs are fine and make a great spot for your wideband. If you do decide to add another bung just don't place it on the bottom half the pipe. Water can collect on the bottom and you don't want the sensor facing down if you bottom out.

Pro-tuned · 10-01-2019, 10:53 PM

I would not place the sensor downstream it needs accurate temperatures coming Cleanly from the exhaust to provide accurate data, not to mention the potential damage if the cat comes internally apart or the cat is not 100% sealed.

StingrayblueSS · 10-02-2019, 04:28 AM

Quote:

Originally Posted by Pro-tuned

I would not place the sensor downstream it needs accurate temperatures coming Cleanly from the exhaust to provide accurate data, not to mention the potential damage if the cat comes internally apart or the cat is not 100% sealed.

I don't have cats.

zlathim · 10-02-2019, 08:34 AM

I look at this a couple different ways. The safest thing to do is follow the manufacturer's suggested location in terms of distance downstream. That's what I did. I put mine in the header collector, in front of the HFCs. Since you don't have cats, I see no problem with the sensor being a little bit further back to take advantage of the existing bung(s).

If you don't have a wideband, the dyno tuner will just put the sensor in the end of your tailpipe anyway. That is a lot further back than the rear O2 bung.

Pro-tuned · 10-02-2019, 08:30 PM

Quote:

Originally Posted by StingrayblueSS

I don't have cats.

Further back you go the longer it takes to heat up irrespective of cats that’s another reason it’s recommended to be placed in the header. The tailpipe installation is useless and the data is unreliable and not 100% true.

JANNETTYRACING · 10-03-2019, 08:54 AM

Quote:

Originally Posted by Sparko

If you're installing a wideband, it's to accurately monitor the combustion mixture as it's exiting the cylinder. As the gas flows through the system it continues to react and begins to condense. If you do not install the sensor where it is designed to be placed you are not reading the gas as it is intended and designed and will not have the accuracy it should. Enough options for an inexpensive installation exist, seems like a silly place to try to cut a corner.

Sent from my Pixel 2 using Tapatalk

This, is a well written answer Pay attention boys.

Ted.

Pro-tuned · 10-04-2019, 01:54 AM

RIGHT ON POINT!

FasNuf · 10-04-2019, 06:52 AM

That's strange, if all this is true, why do dyno's have a wideband for tuning that fits in the tail pipe? 4 wire sensors are heated so that parts irrelevant. With the exception being the time delay from the engine output until it reads on the gauge, I dont see a disadvantage for installing a few inches farther back. Maybe if you're using it for data logging you might want the fastest response possible.

07-04-2018, 07:37 PM	#1
rdavis Drives: 2012 SS Join Date: Feb 2016 Location: Lubbock Texas Posts: 120	Wideband A/F guage I was wondering that since my rear O2s are turned off, could I use one of t the bungs for a wideband O2 sensor, or is it too far down stream. I do not have cats at the moment. Thanks in advance. __________________ 2012 2SS/RS 6speed, Howards asa cam on 113lsa Stainless works LT's, NPP exhaust, Z28 Cai, 3.91 gears. Tuned by Blue Thunder 2 racing Lubbock Texas.

07-04-2018, 08:04 PM	#2
eLeSthree Drives: 2011 Camaro SS 6sp Join Date: Nov 2016 Location: Drivers Seat Posts: 1,904	Most widebands will tell you in the installation instructions where they prefer to be placed. Like 18-30 inches downstream for example. I think that second bung may be too far. I had one welded in a few inches before my first o2 sensor inside the header collector, and slightly offset so it didn't block the airflow of the stock one. It only cost me $40 for the weld job. __________________ 2011 Camaro SS---SOLD TMS Dart 427 FED M311s, ESS Tuning G4 Blower, DSX Triple FP Assembly, DSX FF, FIC1300, Mcleod RXT 1200HD, Edlebrock Pro Flo XT 1158whp 1017wtq. 2010 CTS-V A6 - "Stock" SOLD 630whp 658wtq 2024 F-150 RCSB 5.0 4x4 waiting for tunes...

10-01-2019, 10:53 PM	#8
Pro-tuned Angewendet Ingenieur Drives: 14 Camaro ZL1 Join Date: Apr 2015 Location: USA Posts: 401	I would not place the sensor downstream it needs accurate temperatures coming Cleanly from the exhaust to provide accurate data, not to mention the potential damage if the cat comes internally apart or the cat is not 100% sealed. __________________ ———— LQ9, Iron Block, Forged internals, 408CI, Jannetty custom cam, TS short block, Whipple, Hardened Jackshaft, PRC 260, 2X3 Dynatech Full Competition, HF Cats, CAI, NW 103, Chee, ID 1300, COPO Breather, MSD, Fore Dual Pump, ultratorque, E85, dual Meth, True Trac, 3:45, 1500hp axle-shafts, DSS CF, BMR, custom Pearl/Candy paint by Jaidah.

10-02-2019, 08:34 AM	#10
zlathim Drives: 2010 Camaro 2SS/RS M6 Join Date: May 2009 Location: Idaho Posts: 726	I look at this a couple different ways. The safest thing to do is follow the manufacturer's suggested location in terms of distance downstream. That's what I did. I put mine in the header collector, in front of the HFCs. Since you don't have cats, I see no problem with the sensor being a little bit further back to take advantage of the existing bung(s). If you don't have a wideband, the dyno tuner will just put the sensor in the end of your tailpipe anyway. That is a lot further back than the rear O2 bung. __________________ GPI SS2; EE E2 catch can; SP 1 7/8" LT Headers w/ hfc; FM AT 3" cat-back; CAI Cold Air Intake; AEM Wideband Tuned by GPI McCleod RXT; MGW flat stick; Ram Clutch slave cylinder & hydraulic adjuster BMR cradle & diff bushings, trailing arms, toe rods & upper control arm bushings Hotchkis sub-frame brace Stop Tech Z-23 brakes 4.10 gears, Eaton Truetrac, LPW diff cover Best 1/4 mile 12.073 @ 115.68 mph 3,300 ft DA

09-30-2019, 12:28 AM	#3
StingrayblueSS Drives: 2013 Camaro SS Join Date: Feb 2017 Location: Indiana Posts: 901	I have the same question about using the o2 sensor location for the wideband. I'm also catless with long tube headers.

09-30-2019, 06:54 AM	#6
FasNuf Drives: 2014 Camaro ZL1 Join Date: Jul 2019 Location: Oregon Posts: 1,609 View My Garage	Just follow the directions of the manufacturer. You do want to put it in a place where all the gasses from the primaries converge, not just in a single primary. Make sure the sensor is clocked in such a way as to allow condensation from start up to travel away from the sensor, not pool into the sensor.

09-30-2019, 08:44 AM	#7
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,663	The rear O2 sensor bungs are fine and make a great spot for your wideband. If you do decide to add another bung just don't place it on the bottom half the pipe. Water can collect on the bottom and you don't want the sensor facing down if you bottom out.

10-04-2019, 01:54 AM	#13
Pro-tuned Angewendet Ingenieur Drives: 14 Camaro ZL1 Join Date: Apr 2015 Location: USA Posts: 401	RIGHT ON POINT!

10-04-2019, 06:52 AM	#14
FasNuf Drives: 2014 Camaro ZL1 Join Date: Jul 2019 Location: Oregon Posts: 1,609 View My Garage	That's strange, if all this is true, why do dyno's have a wideband for tuning that fits in the tail pipe? 4 wire sensors are heated so that parts irrelevant. With the exception being the time delay from the engine output until it reads on the gauge, I dont see a disadvantage for installing a few inches farther back. Maybe if you're using it for data logging you might want the fastest response possible.