O2 Sensor location:

[aarvig]

Hey guys! I'm switching my carbed 427w over to Sniper EFI this winter. I am trying to get ideas for where to optimally place the O2 sensor. I am wondering if anyone has any pictures of their carbed (not coyote) O2 sensor set up and if you placed it on the side pipes what clock position is it at?

[skidd]

I have an innovate wide band in the passenger side pipe, just after the collector. Angled just down enough to clear the body. About 2k miles so far. The cost of reading it if/when it burns out early is worth it for the ease of the install.

https://www.ludicrous-speed.com/zp/cache/Shanes%20Cobra/TheBuild/IMG_20190623_220204_595.jpg
https://www.ludicrous-speed.com/zp/Shanes%20Cobra/TheBuild/IMG_20190623_220204.jpg

[rich grsc]

Put it in the exhaust header and be done with it.

[phileas_fogg]

I did the same as skidd. When I was researching O2 sensors, I couldn't find anything but anecdotal evidence stating the sensor failed early. Of course, all the manufacturers tell you not to install it that way, but I didn't see any increase in reports of the sensor failing for those of us that do.


John

[Norm B]

After contacting Holley tech support, I installed mine in the same location as Skidd. They were adamant that it go in the collector and not in a single header tube. Their only concern/suggestion with the upward angle of install was to avoid running the engine for short periods and to make sure the exhaust pipes were hot at shutdown.
This avoids moisture building up on the sensor.

Norm

[Jim1855]

I had a pair with a FAST AFR dual channel meter. Same basic location as Skidd.
Somewhere up the side a bit so any pooling of water is below the sensor seems to work.
I never thought that running in one header tube was a good plan although that's probably the best place to read that one cylinder. There's just too much opportunity for variation between the cylinders and averaging 4 would be better.
Jim

[Bill_VA]

I'm doing the same thing almost, but going with Holley's Terminator X Stealth. I read too many articles about mounting the O2 sensor below the 90 degree mark and having multiple/early failures. I bit the $1000 bullet and bought a set of Gas-N headers with the O2 bung in the first collector.

[Blitzboy54]

I guess I don’t understand the question. Would you install it in the 02 bung provided in the Jpipe/Cat/header? Why move it further down?

https://thefactoryfiveforum.com/attachment.php?attachmentid=157865&d=1638114493

[Bill_VA]

I guess I don’t understand the question. Would you install it in the 02 bung provided in the Jpipe/Cat/header? Why move it further down?


Because most of us have straight 4 into 4 headers and the only real place to put the sensor is the collector in the side pipes. The fatal flaw is that there's just no room between the collector in the side pipe and the body of the car to mount the sensor above the 90 degree point and unfortunately nobody makes a low-profile O2 sensor. That's why I'm changing out my headers for ones with a "pre" collector and an O2 bung in them. https://www.gas-n.com/collections/factory-5-headers/products/351-long-tube-headers

https://cdn.shopify.com/s/files/1/2658/3276/products/351HeadersWithSwivelCollectorCollectorCloseUp_300x .jpg?v=1611548615

[Blitzboy54]

Because most of us have straight 4 into 4 headers and the only real place to put the sensor is the collector in the side pipes. The fatal flaw is that there's just no room between the collector in the side pipe and the body of the car to mount the sensor above the 90 degree point and unfortunately nobody makes a low-profile O2 sensor. That's why I'm changing out my headers for ones with a "pre" collector and an O2 bung in them. https://www.gas-n.com/collections/factory-5-headers/products/351-long-tube-headers

https://cdn.shopify.com/s/files/1/2658/3276/products/351HeadersWithSwivelCollectorCollectorCloseUp_300x .jpg?v=1611548615


Oh, that makes sense. Learned something today.

As an aside I love your products and have purchased several of them.