O2 Sensor Placement?

Discussion on Data Loggers, how to read your logs, what to improve, etc.

Moderator: RPM

Post Reply
Message
Author
NOVALOU
Posts: 10
Joined: Sat Dec 18, 2010 4:25 pm
Location: So-Cal

O2 Sensor Placement?

#1 Post by NOVALOU » Sat Dec 18, 2010 7:37 pm

I just bought a RPM Performance data logger and I'm in the beginning stages of the install. Could you guys tell me where do you have your O2 sensors at in your exhaust? The instructions say to put it 8" from the head exhaust flange. I'm wondering if I'll get a bad reading if I put it in the header extension. I already have a bung there because that is where the guys at the chassis dyno told me to put it.
Last edited by NOVALOU on Sun Dec 19, 2010 10:55 am, edited 1 time in total.

User avatar
CDR Performance
Posts: 147
Joined: Tue Mar 02, 2010 7:41 pm
Location: Indianapolis, Indiana

Re: O2 Sensor Placement?

#2 Post by CDR Performance » Sun Dec 19, 2010 5:15 am

It need to be in the top half of the pipe from 9 o'clock to 3.
If you do not have a full exhaust it must be several feet from the end of the pipe or reversion and fresh air will create false readings on the meter.
CDR PERFORMANCE
The Custom Engine Shop

Dart - Callies - BRC - Oliver - BME - Custom Cams - T&D - Trend - JGS - BorgWarner - SuperNatural - EV - CSU - C&S - BS3

http://www.cdrperformance.biz

NOVALOU
Posts: 10
Joined: Sat Dec 18, 2010 4:25 pm
Location: So-Cal

Re: O2 Sensor Placement?

#3 Post by NOVALOU » Sun Dec 19, 2010 2:43 pm

Oh well, that's what I was afraid of. Thanks for the reply.

User avatar
CDR Performance
Posts: 147
Joined: Tue Mar 02, 2010 7:41 pm
Location: Indianapolis, Indiana

Re: O2 Sensor Placement?

#4 Post by CDR Performance » Mon Dec 20, 2010 5:41 am

Just add another bung, they are cheap $6. or something.
CDR PERFORMANCE
The Custom Engine Shop

Dart - Callies - BRC - Oliver - BME - Custom Cams - T&D - Trend - JGS - BorgWarner - SuperNatural - EV - CSU - C&S - BS3

http://www.cdrperformance.biz

lightning-jr
Posts: 2
Joined: Mon Nov 08, 2010 10:25 am
Location: Pacific NW

Re: O2 Sensor Placement?

#5 Post by lightning-jr » Mon Dec 20, 2010 7:24 pm

The wideband Bosch sensor I installed (LSU4.2) is mounted just downstream of the collector.
This is with a full length exhaust.

My inquiries to Innovate resulted in a recommendation of 36-48" from the head, backed with infrared temp measurements.

Innovates major concern seems to be that the sensor is not exposed to temps in excess of 900*F which will fry the poor thing.
EFI Rat/Self-Tuned

bracketracer
Posts: 329
Joined: Wed Oct 29, 2008 7:14 pm
Location: New Jersey

Re: O2 Sensor Placement?

#6 Post by bracketracer » Thu Jan 13, 2011 6:19 am

Not true it won't fry.....
If you have a slip on collector and an O2 after that you will also get false readings also with a leaky header gasket...
I prefer about 10" up from the collector...
Image

NOVALOU
Posts: 10
Joined: Sat Dec 18, 2010 4:25 pm
Location: So-Cal

Re: O2 Sensor Placement?

#7 Post by NOVALOU » Thu Jan 13, 2011 7:36 pm

I installed mine 14" up from the exit on the header extension. I haven't ran the motor yet, but from what I've been hearing is the only down fall to this is a possible false reading at idle.

User avatar
CDR Performance
Posts: 147
Joined: Tue Mar 02, 2010 7:41 pm
Location: Indianapolis, Indiana

Re: O2 Sensor Placement?

#8 Post by CDR Performance » Fri Jan 14, 2011 4:43 am

You may have to install an extension to the head so the O2 does not see fresh air.
As for heat we run them 18" from the turbos on motor making 1500 hp +.
CDR PERFORMANCE
The Custom Engine Shop

Dart - Callies - BRC - Oliver - BME - Custom Cams - T&D - Trend - JGS - BorgWarner - SuperNatural - EV - CSU - C&S - BS3

http://www.cdrperformance.biz

Post Reply

Who is online

Users browsing this forum: Bing [Bot] and 1 guest