Thread: O2 Reading
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Old 05-01-2019, 11:22 AM   #3
Tom Goldman
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Default Re: O2 Reading

Hi Cal. If you are going to Atco this weekend .I can give you a quick crash course on what to look for .
O2's in the collector can be difficult to get real world readings on a throttle stop car. Stockers use them in the collector ,but usually just to let the car fine tune in closed loop mode.
The top tuners use individual cylinder readings.
The best readings are gained from an individual cylinder about 12" or less from the port .
You also need to go into the configuration file for the O2 and smooth out the graph peaks so you can get a readable average reading.
13, 14 To one AFR in the collector is not necessarily too lean . At an individual cylinder it might be in the mid to high 12's .
You also have to make sure you have done a free air calibration on the Sensor.
.90 throttle stop cars usually like around 12.8 -13.2 AFR.
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