Anyone using an O2 gauge...?
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 990
Likes: 0
From: North Texas
Originally Posted by BlackRat
Ok I don't want to high jack this thread but can somebody give me some detail on how an O2 sensor helps in tuning the car? How and where does it mount? What would be the purpose of an inside the car guage?
Black Rat,
You mount the O2 sensor in the collector to monitor the A/f ratio.
This allows you to set your idle, WOT, parital throttle - A/F for maximum performance.
Safety Car
Joined: Jul 2002
Posts: 3,770
Likes: 3
From: St Louis MO
Originally Posted by zwede
Widebands use what is called a "nernst cell", or "pump cell". At the risk of simplifying, the basic operation of a wideband is this:
Inside the wideband sensor is a regular narrowband element. The pump cell has the ability to "offset" the NB. So instead of switching hi/low at 14.7:1 (lambda 1.0), the pump cell can make it switch either at a higher or lower lambda. The amount of offset is controlled by how much current you feed into the pump cell.
The controller monitors the NB element and adjusts the pump cell current to make the NB element switch back and forth. The controller than looks at how much pump cell current it has to supply and calculates what lambda that represents.
In addition, a WB sensor has a fairly narrow heat range it works in so the controller also monitors and adjusts the heater element.
Inside the wideband sensor is a regular narrowband element. The pump cell has the ability to "offset" the NB. So instead of switching hi/low at 14.7:1 (lambda 1.0), the pump cell can make it switch either at a higher or lower lambda. The amount of offset is controlled by how much current you feed into the pump cell.
The controller monitors the NB element and adjusts the pump cell current to make the NB element switch back and forth. The controller than looks at how much pump cell current it has to supply and calculates what lambda that represents.
In addition, a WB sensor has a fairly narrow heat range it works in so the controller also monitors and adjusts the heater element.
I WAS thinking of buying one to play around with...
Brett
Drifting
Joined: Mar 2003
Posts: 1,608
Likes: 3
From: Canberra AUSTRALIA
St. Jude Donor '05-'06
I understand the theory. If you buy the single wire one from Summit how do you use it?
Do you tweak the carb until you have the gage is lighting up half the lights (in between lean and rich?)
Since it is a narrow band it will toggle from rich to lean fairly easy so if you hover in the middle it should be stoic right?
I was thinking of putting one in both sides and putting a switch on the gage. I am thinking of hiding the gage in the top of the park-brake console under the cushion so it is out of site most of the time.
Do you tweak the carb until you have the gage is lighting up half the lights (in between lean and rich?)
Since it is a narrow band it will toggle from rich to lean fairly easy so if you hover in the middle it should be stoic right?
I was thinking of putting one in both sides and putting a switch on the gage. I am thinking of hiding the gage in the top of the park-brake console under the cushion so it is out of site most of the time.
Melting Slicks
Joined: Feb 2003
Posts: 3,053
Likes: 4
St. Jude Donor '03,'11
i wonder if there is any problem to put together a temporaory setup that you could just shove up the tailpipe and move from vehicle to vehicle?
Thats where the expensive emissions machines measure it.
Thats where the expensive emissions machines measure it.
Le Mans Master
Joined: Feb 1999
Posts: 6,807
Likes: 0
From: Hoosier
Cruise-In III Veteran
I'm using an Autometer sensor and gauge. Gauge is mounted in the clock space. Tuning is is easy. Unlike some others, I feel that the narrow band is a decent tuning tool. It seems the closer I tune the system the more stable and reliable the gauge reads. At idle it shows very stable at 13.5, at part throtle 13, at WOT 12, and at highway cruise 15.5. All the readings I intended to achieve.
Timing, carburator calibration, and vacuum all affect the reading.
Timing, carburator calibration, and vacuum all affect the reading.
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Melting Slicks
Joined: Feb 2004
Posts: 2,435
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From: largo florida
Melting Slicks
Joined: May 2002
Posts: 2,431
Likes: 52
From: Florida
Originally Posted by cbr900son
OFF subjext but what steering wheel is that? Looks nice
and thanks Mike Mercury
Safety Car
Joined: Oct 2000
Posts: 4,282
Likes: 172
From: Lake Wylie, South Carolina
I saw this one on Summits site along with a $60 guage. http://store.summitracing.com/partde...=KeywordSearch
Is this one that some of you are using or planning to use?
Wade
Is this one that some of you are using or planning to use?
Wade