O2 Sensor Location

Grover · 09-13-2021, 01:39 PM

This has probably been asked, but couldn't find it, so will ask. How far away from the primaries in the collector should the O2 sensor be placed? This is for a 4th Gen F body LT1 stock eliminator. Using a Holley HP system.

Darrel Goheen · 09-15-2021, 02:46 AM

I moved mine from the collector and put it about 10” away from the head in a primary tube. Works much better than in a collector. People will argue “but that’s only measuring one cylinder instead of the average. What if that cylinder has a problem?” To me it doesn’t matter in that regard. No matter where it’s located and you have a bad cylinder it’s still going to be messed up.

427FE · 09-15-2021, 06:24 AM

I was advised 9" from the header flanges. One in each primary, so you can move the 02's around.

KRatcliff · 09-15-2021, 12:19 PM

A good way to mark where to place the O2 once you measure down from the flange is to use a spark plug. That will give you a good idea where on the tube to get enough clearance for the O2 and wire.

J.R. Haddad · 09-15-2021, 01:03 PM

Cancelled.

SSDiv6 · 09-15-2021, 03:48 PM

Quote:

Originally Posted by KRatcliff

A good way to mark where to place the O2 once you measure down from the flange is to use a spark plug. That will give you a good idea where on the tube to get enough clearance for the O2 and wire.

Kyle,
Since you are a Texan, do you use a 5/8" Short Reach spark plug or a Long Reach, 13/16" spark plug???

:

KRatcliff · 09-15-2021, 03:52 PM

Quote:

Originally Posted by SSDiv6

Kyle,
Since you are a Texan, do you use a 5/8" Short Reach spark plug or a Long Reach, 13/16" spark plug???

:

Everything is bigger in Texas. 😂

SSDiv6 · 09-15-2021, 04:57 PM

Quote:

Originally Posted by KRatcliff

Everything is bigger in Texas. 😂

monte385 · 09-18-2021, 10:52 PM

Talked to a super nice guy a few weeks ago, he has one in each primary about 10 - 12 inches from the head.

09-13-2021, 01:39 PM	#1
Grover Junior Member Join Date: Oct 2015 Posts: 27 Likes: 10 Liked 6 Times in 4 Posts	O2 Sensor Location This has probably been asked, but couldn't find it, so will ask. How far away from the primaries in the collector should the O2 sensor be placed? This is for a 4th Gen F body LT1 stock eliminator. Using a Holley HP system. Last edited by Grover; 09-13-2021 at 02:06 PM.

09-15-2021, 02:46 AM	#2
Darrel Goheen Member Join Date: Jan 2011 Location: Hays, KS Posts: 380 Likes: 226 Liked 70 Times in 31 Posts	Re: O2 Sensor Location I moved mine from the collector and put it about 10” away from the head in a primary tube. Works much better than in a collector. People will argue “but that’s only measuring one cylinder instead of the average. What if that cylinder has a problem?” To me it doesn’t matter in that regard. No matter where it’s located and you have a bad cylinder it’s still going to be messed up. __________________ Darrel Goheen 785-623-7021 Stock Eliminator 585 94 Camaro Z/28 LT1/ET 585 67 Chevelle 427 Tehnician for JustAnswer.com

09-15-2021, 06:24 AM	#3
427FE Member Join Date: Sep 2016 Location: Monroe Twsp, NJ Posts: 192 Likes: 260 Liked 347 Times in 79 Posts	Re: O2 Sensor Location I was advised 9" from the header flanges. One in each primary, so you can move the 02's around.

09-15-2021, 12:19 PM	#4
KRatcliff Senior Member Join Date: Sep 2011 Posts: 763 Likes: 75 Liked 524 Times in 141 Posts	Re: O2 Sensor Location A good way to mark where to place the O2 once you measure down from the flange is to use a spark plug. That will give you a good idea where on the tube to get enough clearance for the O2 and wire.

09-15-2021, 01:03 PM	#5
J.R. Haddad Senior Member Join Date: Jun 2012 Posts: 778 Likes: 916 Liked 1,434 Times in 304 Posts	Re: O2 Sensor Location Cancelled. Last edited by J.R. Haddad; 09-15-2021 at 01:05 PM.

09-18-2021, 10:52 PM	#9
monte385 Junior Member Join Date: Oct 2015 Posts: 60 Likes: 44 Liked 27 Times in 19 Posts	Re: O2 Sensor Location Talked to a super nice guy a few weeks ago, he has one in each primary about 10 - 12 inches from the head.