O/2 sensor setup
Thread Starter
Instructor
Joined: Jun 2004
Posts: 235
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From: NE
O/2 sensor setup
I'm planning to install some O/2 sensors in the collectors of the hooker headers.
For a quick and inexpensive way to do this, would it work to purchase two of these wide band Innovate oxygen sensors part number: INN 3737 and run them to a toggle switch and then to the stock volt meter in the dash? The toggle would be used to switch between left and right. The info about the innovate sensor says it puts out 0 to 5 volts.
If this will work can someone point me to a link on summit to the attachment cable that will plug into these sensors? I found this one: INN-3738, but I don't think this is the right one. What kind of plug is on these sensors?
For a quick and inexpensive way to do this, would it work to purchase two of these wide band Innovate oxygen sensors part number: INN 3737 and run them to a toggle switch and then to the stock volt meter in the dash? The toggle would be used to switch between left and right. The info about the innovate sensor says it puts out 0 to 5 volts.
If this will work can someone point me to a link on summit to the attachment cable that will plug into these sensors? I found this one: INN-3738, but I don't think this is the right one. What kind of plug is on these sensors?
Last edited by Engraver; Apr 12, 2005 at 01:49 PM.
Melting Slicks
Joined: May 2002
Posts: 2,508
Likes: 0
From: Wisconsin
Why two sensors? I don't see the point. You should really only need it for tuning, and then you would do it one bank at a time, or better yet, one tube at a time. It is best to mount them right up at the exhaust port, the results are more accurate. So 8 bungs. I don't see the benefit of on-the-fly measurements. I am also not sure that a volt sensor is enough for a Wide-band O2. If it was that simple no one would spend all that money for the LM-1.
That cable will not work as it connects the LM-1 unit to the sensor.
That cable will not work as it connects the LM-1 unit to the sensor.
Race Director
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
You really only need one sensor to measure one side. You could put a plug on the other side and measure it at a different time. They should be the same unless there is something wrong with your engine. With wide band, the reading is accurate after all cylinders are mixed at the collector or even farther downstream. You can even measure at the exhaust tip with wide band. Innovate provides a special clip for this, so you wouldn't need to drill and install a bung if you just use the sensor for tuning.
The bigger issue is...how are you going to heat the sensor? You need the Innovate box / power supply to provide the 12volts to the sensor. When it is heated, it will return a linear 0 - 5 volts which will indicate the A/F ratio.
The bigger issue is...how are you going to heat the sensor? You need the Innovate box / power supply to provide the 12volts to the sensor. When it is heated, it will return a linear 0 - 5 volts which will indicate the A/F ratio.
Last edited by Z-man; Apr 12, 2005 at 03:18 PM.
Safety Car
Joined: Jul 2002
Posts: 3,770
Likes: 3
From: St Louis MO
According to ZWEDE, you can't use a wideband like you would a narrowband. The WB requires an input voltage and it's output voltage is dependant on this.
Just use 2 NB sensors, one in each collector. Either switch them to one gauge or have 2 gauges. Someone here on the forum uses 2 gauges, it's a swet idea.
Brett
Just use 2 NB sensors, one in each collector. Either switch them to one gauge or have 2 gauges. Someone here on the forum uses 2 gauges, it's a swet idea.
Brett
Racer
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Burning Brakes
Joined: Nov 2003
Posts: 990
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From: North Texas
I don't think he's trying to use it like a narrow band sensor.
If he's just reading voltage, he could install a 0 to 5 volt display.
You would just need to work out the wiring to supply 12 vdc.
Shouldn't be that difficult.
If he's just reading voltage, he could install a 0 to 5 volt display.
You would just need to work out the wiring to supply 12 vdc.
Shouldn't be that difficult.
Race Director
Joined: Oct 2000
Posts: 14,996
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From: central FL, near the beach.
Safety Car
Joined: Jul 2002
Posts: 3,770
Likes: 3
From: St Louis MO
Originally Posted by 1970-Bronze
I don't think he's trying to use it like a narrow band sensor.
If he's just reading voltage, he could install a 0 to 5 volt display.
You would just need to work out the wiring to supply 12 vdc.
Shouldn't be that difficult.
If he's just reading voltage, he could install a 0 to 5 volt display.
You would just need to work out the wiring to supply 12 vdc.
Shouldn't be that difficult.
http://forums.corvetteforum.com/show...and&forum_id=3
In particular this post by ZWEDE in that thread:
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.
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