O2 Sensors and A/F Ratio
I and trying to figure out what the A/F ratio is based on a voltage reading from a O2 sensor
So far I know that a reading of.1 volt is lean and .9 volts is rich. 14.7 : 1 is at .45 volts. Anybody know what is the optimal ratio (I think 13:1) and what would that equal in a voltage reading from the O2 sensor? I picked up this package called digimoto and it is for reading different sensors from the ODBII port... also has a built in dyno feature... kinda neat diagnostics software, also reads and clears codes. |
OK found some stuff if anyone is interested...
0.97V - 12.1:1 - Very Rich. 0.88V - 12.7:1 0.78V - 13.2:1 0.69V - 13.8:1 0.59V - 14.4:1 0.49V - 14.9:1 - (Stoich-) 0.39V - 15.4:1 0.30V - 16.0:1 0.20V - 16.5:1 0.10V - 17.1:1 - Lean |
Stoich is 14.6:1
I would not consider very rich 12.1 Any reason you are trying to figure this out? Maybe we can point you in the right direction |
Originally Posted by meister@steeda.ca
Stoich is 14.6:1
I would not consider very rich 12.1 Any reason you are trying to figure this out? Maybe we can point you in the right direction And yes I know you guys do that stuff and will consider that option down the road as well. Cheers! |
You will not be able to monitor A/F with a stock 02 Sensor or accuratly by monitoring V
'Best bet is a wideband commander or LM-1 |
Yep! 12.1 is not RICH! have to agree there! on both get a Wideband for a accurate reading! LM or even WMS
|
Originally Posted by meister@steeda.ca
You will not be able to monitor A/F with a stock 02 Sensor or accuratly by monitoring V
'Best bet is a wideband commander or LM-1 Do you make use of the factory sensors for tuning or do you put a different one in to tune... I'm confused? What good is a tune if it still uses the factory O2 sensors? |
the O2 sensors on the car work fine for what they are meant for, which is a very narrow range around stoch, or 14.7:1
that being said, to tune properly, you need to put a wideband O2 sensor in one of the pre-cat bungs to get proper readings. |
Originally Posted by Khaine
the O2 sensors on the car work fine for what they are meant for, which is a very narrow range around stoch, or 14.7:1
that being said, to tune properly, you need to put a wideband O2 sensor in one of the pre-cat bungs to get proper readings. Still trying to understand the whole process. |
If you take it to get it tuned, they usually have a a/f meter whick they put down your tail-pipe. This is a wide band 02 sensor. They tune with that. They remove it when theyre done tuning the car.
If you buy a wide band 02, then you weld in a bung after the cats or around that area and install the sensor. This remains there all the time as you have a guage and can constanty monitor the a/f reading. Some dyno shops will weld a bung in and install the sensor and simply remove it and plug it when done. |
All times are GMT -5. The time now is 12:56 AM. |
© 2024 MH Sub I, LLC dba Internet Brands