Wideband O2 with analog gauge ?s

[ddogg777]

I wan't sure if this is the right forum to post but I was wondering if a wideband O2 sensor and controller can be hooked up to a nice A/F gauge such as the Defi D-gauge. I want a WB O2 but I rather dislike the led displays that come with them.

 

[YP5 Toronto]

innovatemotorsports has an analog 52mm guage that works with the Wideband O2 control unit...

when they came out with that...I made my decision to purchase...

http://www.innovatemotorsports.com/...0&page=1&xid=5e1af8d6b23384179e16c7c8f3eef9b0

 

[Chojin]

ddogg777 -

Check out AEM's new Gauge-Type Wideband UEGO Controller:

http://www.aempower.com/product_ems.asp

-Shawn


Edit: Fixed link.

 

[PaulMP3]

mine has a digital readout.. it is really easy to see. no LED...

 

[Bigg Tim]

I like that AEM one, but it's over 600 bucks!:'(

 

[Bullit]

Check out

http://www.plxdevices.com/products.htm

They have a converter so you can use the autometer gauge to display the reading. I have a Defi and am waiting to hear back if the same adapter for the Autometer will show accurately on the Defi gauge. Still not cheap...but what wideband is? At least you can use an exisiting guage because the narrowbands are useless.

 

[PaulMP3]

ddogg777 -

Check out AEM's new Gauge-Type Wideband UEGO Controller:

http://www.aempower.com/product_ems.asp

-Shawn


Edit: Fixed link.

i just saw that today in turbo mag... that looks sweet. it has a sweeping gauge and a digital readout in one.

 

[ddogg777]

They have a converter so you can use the autometer gauge to display the reading. I have a Defi and am waiting to hear back if the same adapter for the Autometer will show accurately on the Defi gauge.

Be sure to let me know!

 

[Mental Addiction]

The AEM unit is awesome.We played with it about 7 months ago at AEM while it was on there test car(which we now have).The AEM unit should be released on Monday Feb 2.

 

[seatbackfurther]

I like that AEM one, but it's over 600 bucks!:'(

http://www.i-m-racing.com/aemaifuga.html

little cheaper, but still expensive.

 

[perfworks]

I use the innovatemotorsports one. It works great. There is no need to wait for them to release the gauge from innovative. ANY 0-1 volt A/F meter can be completely accurate with the LM1 output.

 

[perfworks]

And yes the AEM one is going to be the s***.

 

[ddogg777]

I use the innovatemotorsports one. It works great. There is no need to wait for them to release the gauge from innovative. ANY 0-1 volt A/F meter can be completely accurate with the LM1 output.

That raises an interesting question, if your wideband controller has a narrowband and a wideband output (which the PLX devices have as well as the AEM) why would you need a WB to NB converter like PLX devices sells (see Bullit's suggestion)? Couldn't I hook up any analog A/F gauge to the analog NB output and then connect the WB output to my ECU?

 

[perfworks]

That raises an interesting question, if your wideband controller has a narrowband and a wideband output (which the PLX devices have as well as the AEM) why would you need a WB to NB converter like PLX devices sells (see Bullit's suggestion)? Couldn't I hook up any analog A/F gauge to the analog NB output and then connect the WB output to my ECU?

Your losing me here. Why would you connect your NB to the A/F gauge and the WB to the ECU. Use the output from the unit to the ECU directly. Then tap in with a A/F guage for your display.
If not just use the LM1 as the display. It is just a little big and bulky.
The only thing you need to do is to set up a switched 12 volt source. You can run the unit all day long in the car permenently.
If you are clever you will have the WB "turn on" when the car is close to warming up. That way the life of the sensor will increase. As the Sensor can be damaged thru cold starts and condensation on the element.

 

[Bigg Tim]

Originally posted by perfworks
If you are clever you will have the WB "turn on" when the car is close to warming up. That way the life of the sensor will increase. As the Sensor can be damaged thru cold starts and condensation on the element.

Sounds pretty cool, how would you do that? Would you need to incorporate some type of sensor to detect the correct temp and then wire into some type of relay to turn on the power to the WB?

 

[ddogg777]

Your losing me here. Why would you connect your NB to the A/F gauge and the WB to the ECU. Use the output from the unit to the ECU directly. Then tap in with a A/F guage for your display.
If not just use the LM1 as the display. It is just a little big and bulky.
The only thing you need to do is to set up a switched 12 volt source. You can run the unit all day long in the car permenently.
If you are clever you will have the WB "turn on" when the car is close to warming up. That way the life of the sensor will increase. As the Sensor can be damaged thru cold starts and condensation on the element.

I think that's what I meant, connect the 0-5V wideband output directly to the ECU (my haltech can handle WB input) and the 0-1V narrowband output to a A/F gauge (such as the defi that accepts a 0-1V input). That way the ECU gets what it needs and you can see a fairly accurate reading from your gauge. Maybe I'm wrong, but doesn't the ECu need the O2 reading to determine fuel/timing all the time? Or is it just for tuning?

As far as the delayed switched circuit goes, that wouldn't be too hard if you had the right capacitor, inductor, resistor setup. I would have to research it because it has been too long but it can be done.

 

[PaulMP3]

Maybe I'm wrong, but doesn't the ECu need the O2 reading to determine fuel/timing all the time? Or is it just for tuning?

Im under the impression that the stock narrow band O2 is only used by the ECU in closed loop to help acheive 14.7:1 afr along with othere sensors..

If im wrong feel free to teach me something new.

 

[FrigginGLI]

According to this when I floor my car it's running 11:1? The bar is always directly across from the "C" in rich.

 

[perfworks]

Im under the impression that the stock narrow band O2 is only used by the ECU in closed loop to help acheive 14.7:1 afr along with othere sensors..

If im wrong feel free to teach me something new.

The O2 senosr is always monitoring. As long as it is up to temp. Which after about a minute of high idle it is. The difference is that the stock ECU ONLY uses it in closed loop for A/F ratio correction. IN open loop is is relying on preprogrammed fuel maps. It has nothing to do with ignition.
The narrow band O2 is only accurate at 14.7:1 A/F ratios. THAT is why it is ignored.
Anything above .5 is concidered rich and anything below is lean. It cant configure a numerical value though.

 

[PaulMP3]

The O2 senosr is always monitoring. As long as it is up to temp. Which after about a minute of high idle it is. The difference is that the stock ECU ONLY uses it in closed loop for A/F ratio correction. IN open loop is is relying on preprogrammed fuel maps. It has nothing to do with ignition.
The narrow band O2 is only accurate at 14.7:1 A/F ratios. THAT is why it is ignored.
Anything above .5 is concidered rich and anything below is lean. It cant configure a numerical value though.

Thats what i though.. Thanks for clarifying