AFR Gauge ????

90notch_5.0

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Oct 25, 2007

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Aug 9, 2010

#1

• Aug 9, 2010

• #1

I just got a phantom gauge and have no idea how to install it.
1) My car is carbureted and my 02 sensor dont have power. Is there a way i can make them have power so i can hook up my gauge?
2) When i hook up the guage, do i brige it from only one 02 sensor or both of them?
3) To add power to the 02 sensors is just a matter of running some hot wire coming from the battery and a graund?

Here is the gauge just in case you need to see it:
View attachment 211902

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

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#2

• Aug 10, 2010

• #2

The gauge won't be real useful, esp on a carbed car.

You'd want to use switched power for the O2's, not constant (battery) power.

 

srtthis

the guy doing it does every local racers rear end

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#3

• Aug 10, 2010

• #3

throw that in the trash and get a wideband...

 

90notch_5.0

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Aug 10, 2010

#4

• Aug 10, 2010

• #4

WHY!?!?

 

srtthis

the guy doing it does every local racers rear end

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#5

• Aug 10, 2010

• #5

can you tell me the air fuel for the 2nd and 4th red green and yellow light on that meter?

a true wideband af gauge will give you a number not a light up christmas tree thingy

 

90notch_5.0

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Aug 10, 2010

#6

• Aug 10, 2010

• #6

srtthis said:

can you tell me the air fuel for the 2nd and 4th red green and yellow light on that meter?

a true wideband af gauge will give you a number not a light up christmas tree thingy

Click to expand...

No its not a wideband.

 

srtthis

the guy doing it does every local racers rear end

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#7

• Aug 10, 2010

• #7

90notch_5.0 said:

No its not a wideband.

Click to expand...

thats why i said throw it in the trash or find some ricer forum and try to sell it...

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

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Aug 10, 2010

#8

• Aug 10, 2010

• #8

It's just a fancy lightshow really.

 

90notch_5.0

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Oct 25, 2007

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Aug 10, 2010

#9

• Aug 10, 2010

• #9

Tham i did not do my homework right
So you recomend a wideband?

 

srtthis

the guy doing it does every local racers rear end

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#10

• Aug 10, 2010

• #10

yes...

AEM
FJO
LC-1

 

90notch_5.0

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Aug 10, 2010

#11

• Aug 10, 2010

• #11

Thanks a lot for your help man

 

srtthis

the guy doing it does every local racers rear end

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#12

• Aug 10, 2010

• #12

no problem...

 

S

SVTFreak

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Aug 10, 2010

#13

• Aug 10, 2010

• #13

Just FYI, the reason its pretty useless is that it will only display a ratio of approx 14:1 to 15:1. Its only function is to inform the computer when to richen or lean the mixture in relation to the stoich ratio of 14.64:1 (meaning you have a theoretical perfect mixture, no excess air, no excess fuel). But, in the real world, that doesnt work. So at WOT, the mixture goes to a calculated 12.xx:1 or so (i forget the exact number from ford factory) using only the MAF measurement to shoot for a target with no feedback from the 02 sensors since they cannot read any richer than 14:1 or so.

A wideband sensor and guage will allow you to read much richer and leaner than that. For instance, my LC-1 reads 7.39 to 22.xx (forget exactly).

For graphs and explanations, see here Oxygen (O2) Sensor – Narrowband vs Wideband Boost Source

So, like they said, unless you want a pretty lights display, or a warning that something bad happened (probably too late anyway), toss that one and purchase a true wideband for tuning use.

Keep in mind that widebands also require a controller to function properly (to maintain the correct current and voltage drops). Usually included with the kit, so dont just purchase a sensor from JoeBlow on the corner cause he says it will work.