Apexi turbo timer A/F, O2 voltage settings?

[howie3]

I have a Apexi turbo timer, everything is hooked up and it works great. In the instruction manual it has A/F value, O2 sensor voltage settings. What is this? Do I have to do anything with these settings to "set the timer up"? Everything works it counts down, the A/F and O2 voltage seems to be working. I know this isn't accurate but i'm just wondering if it's working correctly. Thanks for any info. BTW all ready did all the searches and counld'nt find anything.

 

[CanadianTSi]

As long as you tapped it into the o2 wire on the ECU then it should work fine.

 

[howie3]

As long as you tapped it into the o2 wire on the ECU then it should work fine.

Yes, I know it works fine, but what are the settings for? I'm curious.

 

[UPGRADED2G]

The settings are there to to serve as a kind of warning. For example, if you set the battery voltage to 12.5 (like i do), it will flash whenever the battery voltage goes down that low. Remember anything less that 12 is a problem. The o2 voltage and the a/f values arent accurate, as you already stated. Therefore you need not worry too much about them. No one qoutes thier a/f or o2 voltage values off a turbotimer. But the battery voltage is correct! It corresponds perfectly with the AFC reading.

 

[CanadianTSi]

my o2 voltage is perfectly accurate. It's nice to be able to glance at it during WOT and see that's it's normal.

 

[mirkoelek]

why people than buying widebands if you can measure a/f with turbo timer or dsmlink

 

[CanadianTSi]

why people than buying widebands if you can measure a/f with turbo timer or dsmlink

Either of those don't measure Air Fuel Ratio, they only guess.

 

[mirkoelek]

Either of those don't measure Air Fuel Ratio, they only guess.

can they be any accurate

 

[howie3]

WTF Can we focus people. I started this thread looking for information on the A/F and O2 voltage settings on the Apexi turbo timer not a discussion on wideband gauges. So can anyone tell me, cause I don't think anyone has. Thanks.

 

[splattj]

The settings are for calibrating your narrow-band O2 sensor from 0-1v and the corresponding A/F ratios. If you know, for instance, that 960mv is 10:1 A/F you can set the first of the eight values to 960mv. If you know that 450mv is 14.6:1 A/F you would set point four to 450mv. You can set each of the eight points if you know through gas anylization or factory specs what the corresponding A/F ratios are for each of the voltages. It appears that it is set-up to interpolate the values evenly across the board from the factory. I would leave it alone unless you have any other data. Besides, your narrow-band is good for telling you if you're real rich or real lean and that's about it. That's why this started to turn into a W/B O2 discussion. I have also heard claims that tapping the sensor feed to the ECU will throw it off and it is ill-advised. <SHRUG>