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Old 07-31-2012, 07:33 PM   #1
meanjoaquin
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Member#: 309723
Join Date: Feb 2012
Vehicle:
2003 WRX
PSM

Default Apex'i Turbo Timer with a wideband?

I've had an Apex'i pen style turbo timer sitting in my room for the past two years, and I want to install it to take advantage of the A/F feature on it. My question is: Is it possible to utilize a wideband O2 sensor with the Apex'i TT in order to get more accurate readings? Or is the stock narrowband "good enough"?
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Old 07-31-2012, 10:44 PM   #2
Dutch Scooby lover
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Depends on what you want from the AFR function.
If the car is properly setup now then YES you can get a rough indication of anything that causes a change in AFR (hey, I am cruising on the freeway, and the voltage indicated by the Apexi is different then normal, that kinda thing)

You can not use the Apexi to tune a car,as the stock narrowband sensor is not accurate enough.

The second part of your question is a bit harder to answer.
The Apexi gauge reads the voltage on the ECU pin, but I do not know if it can cope with a 0-5 volt wideband scale, as it is typically setup to show a 0-1 volt narrowband signal.

Even so,If the Apexi can cope with the 0-5 volt wideband input the stock ECU can not, so you'll have to get a wideband controller (like the PLX AFR, with both a 0-5 volt and a 0-1 volt output (the wideband to the Apexi, the narrowband to the stock ECU), and those usually come with it's own display (thus negating the need for the Apexi to display AFR)
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Old 08-01-2012, 04:08 PM   #3
meanjoaquin
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I don't want the wideband to give any info to the ecu, only for the a/f
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Old 08-01-2012, 04:11 PM   #4
Dutch Scooby lover
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Then you can use a Wideband controller without a seperate narrowband output, and hope that the Apexi can display voltages higher then 1 volt.
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