Author Topic: O2 sensor for AFR monitoring  (Read 241 times)

SoupMan

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O2 sensor for AFR monitoring
« on: December 06, 2017, 11:19:01 PM »
Guys,

Wondering what you guys recommend. I'm only looking to buy a O2 sensor. Wondering if I need to dish out the large sum for a wideband and if there's a recommended model for my application. It will be going in a 2.5" exhaust to monitor my Pontiac 455 motor. I'm doing this so I can ensure I remain at a healthy ratio. It will also help with tuning.

What did you guys do?

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #1 on: December 06, 2017, 11:31:07 PM »
I like the AEM Wideband 02 Sensor UEGO Gauge unit.
Many others do too.

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #2 on: December 06, 2017, 11:34:02 PM »

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #3 on: December 06, 2017, 11:36:43 PM »
The AEM Wide Band O2 works with all Gasoline.
E85.
Methanol.
Nitromethane.
Propane.

Leaded race gas will shorten the wideband 02 sensor life.

Works from bone stock engines to all race machines.

Very popular with the street racers at work.
Never seen one fail yet.

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #4 on: December 06, 2017, 11:39:44 PM »
The Lamba scale is nice when your dealing with custom blended fuels.

And for todays E10 Pump gasoline here in the USA.
Ethanol is not always exact as advertised.
They are allowed 5-15 % target for E10.


Re: O2 sensor for AFR monitoring
« Reply #4 on: December 06, 2017, 11:39:44 PM »

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #5 on: December 06, 2017, 11:46:11 PM »
When your tuning with a Wideband 02 Sensor you have to remember to give the Engine what it wants.
Not what you want.
Every engine combo is different in the Fuel Curve it needs.

But you can visually see whats going on Real Time.
Its very accurate & fast reading the AEM UEGO Wideband.
It can Datalog also.
For $180.00 it can not beat by any others.

Used on Ricers to $300,000 Race cars.

SoupMan

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Re: O2 sensor for AFR monitoring
« Reply #6 on: December 06, 2017, 11:52:05 PM »
It looks good. My original plan was to use only an O2 sensor without gauge and read the values using a raspberry pie or mini PC but the more I look at this thing and the more I don't want to bother with it for AFR.

Thanks for all the great info.

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #7 on: December 06, 2017, 11:54:48 PM »
It looks good. My original plan was to use only an O2 sensor without gauge and read the values using a raspberry pie or mini PC but the more I look at this thing and the more I don't want to bother with it for AFR.

Thanks for all the great info.
You have to decide and then try it.
I think you will Love it too.

jonathonar89

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Re: O2 sensor for AFR monitoring
« Reply #8 on: December 07, 2017, 08:02:14 AM »
The Innovate LM-2 is a popular tuning tool for carb and efi guys.  When your car starts getting faster, it becomes harder and less safe to read in real-time.  This is where data logging comes into play.  When you can do a “pull” and then pull up the log afterwards, you can read where your car can run better.  An interesting project would be tuning your carb, stepping up to TBI and then switching to port fuel injection on your current engine.  You will see how/where power and efficiency is gained.

http://www.innovatemotorsports.com/products/lm2.php
1979 Trans Am 400 T-top - Platinum Silver, Carmine Interior
http://transamcountry.com/community/index.php?topic=61460.0

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #9 on: December 07, 2017, 08:06:04 AM »
Carburators still make the Most Torque and HP.

Because the Volumetric cylinder fill can not be matched by off the shelf EFI systems.
They over atomize the fuel.
Mainly for emissions and silky smooth idle.


jonathonar89

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Re: O2 sensor for AFR monitoring
« Reply #10 on: December 07, 2017, 12:39:00 PM »
Carburators still make the Most Torque and HP.

Because the Volumetric cylinder fill can not be matched by off the shelf EFI systems.
They over atomize the fuel.
Mainly for emissions and silky smooth idle.

Are we talking real performance computers or standard GM computers?

Beg to differ.  Carburetors operate on a pressure differential to pull air and gas in the engine.  They need vacuum to suck air AND fuel! 

With EFI, the air door (throttle blade) allows the most amount of air to be introduced to the engine.  Air:Fuel mixture is controlled by the computer and injector at that point.  Good efi computers can even control multiple stages of dry nitrous and manipulate timing/fuel to accommodate.
1979 Trans Am 400 T-top - Platinum Silver, Carmine Interior
http://transamcountry.com/community/index.php?topic=61460.0

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #11 on: December 07, 2017, 02:31:30 PM »
Carburators still make the Most Torque and HP.

Because the Volumetric cylinder fill can not be matched by off the shelf EFI systems.
They over atomize the fuel.
Mainly for emissions and silky smooth idle.

Are we talking real performance computers or standard GM computers?

Beg to differ.  Carburetors operate on a pressure differential to pull air and gas in the engine.  They need vacuum to suck air AND fuel! 

With EFI, the air door (throttle blade) allows the most amount of air to be introduced to the engine.  Air:Fuel mixture is controlled by the computer and injector at that point.  Good efi computers can even control multiple stages of dry nitrous and manipulate timing/fuel to accommodate.
Full on Drag Race is How I rate.
1085 - 4000 Cfm capabilty.

EFI Is best for most here.
No one Reads spark plugs anymore but Oldskool and me.
We do at work to. Working will High Boost Turbo engines daily.
Up to 51 psi Boost levels.

jonathonar89

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Re: O2 sensor for AFR monitoring
« Reply #12 on: December 07, 2017, 04:45:22 PM »
Carburators still make the Most Torque and HP.

Because the Volumetric cylinder fill can not be matched by off the shelf EFI systems.
They over atomize the fuel.
Mainly for emissions and silky smooth idle.

Are we talking real performance computers or standard GM computers?

Beg to differ.  Carburetors operate on a pressure differential to pull air and gas in the engine.  They need vacuum to suck air AND fuel! 

With EFI, the air door (throttle blade) allows the most amount of air to be introduced to the engine.  Air:Fuel mixture is controlled by the computer and injector at that point.  Good efi computers can even control multiple stages of dry nitrous and manipulate timing/fuel to accommodate.
Full on Drag Race is How I rate.
1085 - 4000 Cfm capabilty.

EFI Is best for most here.
No one Reads spark plugs anymore but Oldskool and me.
We do at work to. Working will High Boost Turbo engines daily.
Up to 51 psi Boost levels.

Drag race efi is how I rate as well.  Most here relate efi to GM computers found on LS engines.

After what I’ve learned from others, boost level is irrelevant doesn’t mean good airflow.  It actually means intake back pressure.  Are we pushing that air pressure through a sippy straw or a garden hose?  Big difference if you relate that to port size and air/fuel flow.  Any 4150 or 4500 efi throttle bodies outflow carburetors any day.  There’s no ventury in them to reduce airflow.

Good full on drag racing computers can control those engines along with other things.  There’s simply a lot more control of where/when fuel goes with a port injected engine.  The good computers can also run a real drag race traction control using a driveshaft speed sensor and g-meter.
1979 Trans Am 400 T-top - Platinum Silver, Carmine Interior
http://transamcountry.com/community/index.php?topic=61460.0

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #13 on: December 07, 2017, 06:03:04 PM »
Carburators still make the Most Torque and HP.

Because the Volumetric cylinder fill can not be matched by off the shelf EFI systems.
They over atomize the fuel.
Mainly for emissions and silky smooth idle.

Are we talking real performance computers or standard GM computers?

Beg to differ.  Carburetors operate on a pressure differential to pull air and gas in the engine.  They need vacuum to suck air AND fuel! 

With EFI, the air door (throttle blade) allows the most amount of air to be introduced to the engine.  Air:Fuel mixture is controlled by the computer and injector at that point.  Good efi computers can even control multiple stages of dry nitrous and manipulate timing/fuel to accommodate.
Full on Drag Race is How I rate.
1085 - 4000 Cfm capabilty.

EFI Is best for most here.
No one Reads spark plugs anymore but Oldskool and me.
We do at work to. Working will High Boost Turbo engines daily.
Up to 51 psi Boost levels.

Drag race efi is how I rate as well.  Most here relate efi to GM computers found on LS engines.

After what I’ve learned from others, boost level is irrelevant doesn’t mean good airflow.  It actually means intake back pressure.  Are we pushing that air pressure through a sippy straw or a garden hose?  Big difference if you relate that to port size and air/fuel flow.  Any 4150 or 4500 efi throttle bodies outflow carburetors any day.  There’s no ventury in them to reduce airflow.

Good full on drag racing computers can control those engines along with other things.  There’s simply a lot more control of where/when fuel goes with a port injected engine.  The good computers can also run a real drag race traction control using a driveshaft speed sensor and g-meter.
How much money do you want to spend or can afford ?
Thats the main question to answer for each.
For many these 2nd gens have historical significance.

NOT A TA

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Re: O2 sensor for AFR monitoring
« Reply #14 on: December 07, 2017, 06:23:53 PM »
I've only used the make a pass at the strip & read the plugs method in the past with my Pontiac with a carb in my bird. Will be putting an O2 sensor bung in my new headers and been thinking wide band. I do run leaded race gas and hadn't thought about the possible downside of leaded on the sensor itself. Anyone have experience?
John Paige
Lab-14.com

Re: O2 sensor for AFR monitoring
« Reply #14 on: December 07, 2017, 06:23:53 PM »

70RAIV455

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Re: O2 sensor for AFR monitoring
« Reply #15 on: December 07, 2017, 09:37:58 PM »
I've only used the make a pass at the strip & read the plugs method in the past with my Pontiac with a carb in my bird. Will be putting an O2 sensor bung in my new headers and been thinking wide band. I do run leaded race gas and hadn't thought about the possible downside of leaded on the sensor itself. Anyone have experience?
Expect 10k miles of Wide band 02 sensor life or so on Leaded Race Gas 110.


formula jg

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Re: O2 sensor for AFR monitoring
« Reply #16 on: Today at 03:22:00 PM »
Check out Zeitronix, a lot of quality there and you will definitely need to data log because the devil is in those details that you can't see while driving.

Re: O2 sensor for AFR monitoring
« Reply #16 on: Today at 03:22:00 PM »
You can help support TAC!