Dont count on it with our stock o2 sensor. o2 voltage is the only thing useful its showing you. Throw that other number out the window

 

ya man, the only way a TT is gonna tell you your a/f is by actual voltage numbers, like .92 .94, etc etc etc, and it will jump around like crazy. unless ur TT came with an o2 sensor like the greddy a/f gauge does, its not gonna tell you a "14.7 a/f"

 

digital o2 sensor voltage meters look and read like this
this is what i have in mine

 

This is correct , it is showing a 02 voltage just like the old jumptronix. It is not a air to fuel ratio. You would need a wide band 02 sensor, board and display to get that reading.

 

this is a pic of the o2 sensor voltage, slowy is right, it fucking goes insane... the leds lit up are a/f and o2, this means the voltage

 

this is a pic of the air fuel ratio... and it is expressed in numbers instead of stoich lean and rich, like the greddy gauge

 

and there is the battery voltage but i didnt take a pic of that, thats boring... so all in all i think the apex is the best for the money (even tho everyone of them is like the same price)... i guess its cool if it stumped a couple of peeps (not trying to be a dick)

 

You didnt stump anyone. You are not looking at a actual air to fuel ratio. Unless you have added a wideband 02 sensor in your exhaust somewhere. I hope you are not trying to fine tune from that.

 

Dude. Whether your turbo timer shows 14.1, 8.2, 4700.6...its still not telling you anything. Unless it came with its own O2 sensor, you have what amounts to the autometer blinky blink a/f gauge. In other words: Pretty damn worthless. The greddy wideband A/f gauge comes with its own wiedband 02 sensor and costs over $200. This will give you a TRUE reading. You have a turbo timer, with a little gimic to help apex i' sell more turbo timers. If you dont already have an EGT gauge, get one and see just how "green" your readings really are

 

unless somehow apexi figured that .70 is 14.3 a/r ??
but i doubt they'd give u a digital readout option and an actual ratio option,, ya know?
dizin, u might be lookin at the wrong numbers, idk

the wiring instructions
http://www.apexi-usa.com/productdocu..._autotimer.pdf
actually say to tap the o2 sensor, so you will definately get the actuall voltage number from the o2,,,,,,,well holy shiznittle, it does use the voltage to display an actual number,,,,,
http://www.apexi-usa.com/productdocu...structions.pdf

wierd shit!