I want to get an air/fuel gauge for my 06 SS/SC but I had a couple questions first. If I just bought the gauge and wired it into my stock o2 sensor would I get an accurate reading as if I got the AEM wideband system which comes with a new o2 sensor? Whats the difference between the sensor AEM gives you and the one thats on my car? What seems to be the most popular gauge everyone else is getting?

 

No, you wouldn't get a accurate reading. It all revolves around your narrowband sensor...which is in it's name...narrow with reading. Narrowband sensors were designed to help your stock computer revolve around 14.7 a/f but it can not tell you accurately how lean or how rich you are.

Get a actual wideband unit. Getting the gauge will just waste your time and mislead you.

When you have a issue and someone asks you what your a/f ratio is, are you going to say "It's a little bit on the lean part"?

 

No, a wideband 02 sensor is much more accurate. It has to do with how the ECU controls AFR. A narrowband 02 is looking for a thing called "cross counts" in which the ECU switch over a small amount from rich to lean because the catalytic converter needs both conditions (only slight changes) to function at the best of it's ability. The narrowband is good at quickly reading this slight change and relaying it to the ECU by changes in voltage due to oxygen changes.

A wideband 02 does not constantly switch and views the "big picture" as far as the AFR goes. This allows a much more accurate reading of the true AFR. In other words, no, a narrowband will not produce an accurate reading.

Edit: You got to it before me NJHK haha.

 

The sensor in your car is used by the car's computer to measure if the amount of fuel per unit of air is correct while doing nearly anything other than wide open throttle. This sensor is commonly referred to as a narrowband oxygen sensor in that it reports back a 0-1v signal that has virtually no resolution at anything other than 14.7-1 a/f. This is a tool used by the car's computer to insure the car produces the lowest emissions possible.

The wideband or UEGO (Universal Exhaust Gas Oxygen) sensor that your AEM controller comes with reports back a 0-5v signal and has resolution from around 10-1 all the way to nearly 18-1. This is a tuning tool unlike the narrowband as it provides you with feedback at all throttle conditions most importantly WOT where the greatest amount of heat and power is made.

 

Yeah...that's what I what I meant.

******* Biter lol

 

Narrow Band equals not accurate which equals waste of money.

 

Haha, I was getting at the same thing as well.

 

narrow = light show

wideband is the way to go

 

Nice! You're exactly right, on a UEGO the LED would appear to be on meth lol