Power FC Location Affect of O2 Sensor
06-17-02, 10:02 AM
#1
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Location Affect of O2 Sensor
We installed and tested a M&W UEGO linear O2 sensor in both the DP and the end of the cat back exhaust. We did not observe any noticeable differences in the AFR readings.
Someone had asked me this question and I just got around to testing it.
Being futher away from the turbo and with cooler temperatures, the self heating sensor will last longer.
Someone had asked me this question and I just got around to testing it.
Being futher away from the turbo and with cooler temperatures, the self heating sensor will last longer.
06-17-02, 12:13 PM
#2
Re: Location Affect of O2 Sensor
Originally posted by cewrx7r1
We installed and tested a M&W UEGO linear O2 sensor in both the DP and the end of the cat back exhaust. We did not observe any noticeable differences in the AFR readings.
Someone had asked me this question and I just got around to testing it.
Being futher away from the turbo and with cooler temperatures, the self heating sensor will last longer.
We installed and tested a M&W UEGO linear O2 sensor in both the DP and the end of the cat back exhaust. We did not observe any noticeable differences in the AFR readings.
Someone had asked me this question and I just got around to testing it.
Being futher away from the turbo and with cooler temperatures, the self heating sensor will last longer.
06-21-02, 02:08 PM
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I've had some problems with bad readings after cats. It might work sometimes but other times it hasn't. I would recommend not using a wideband that way unless you are just trying to see if the a:f is in the ballpark (e.g., wideband reads 11:1, a:f might actually be 10:1 or 12:1). Normally the reading will be leaner than actual so it is a valid way to see if you are RICH enough, but don't try to do precision tuning this way.
I would recommend using the sensor at the end of the downpipe or just before the cat. Running a sensor at the stock location will damage some wideband sensors.
I still use a tailpipe probe for my own car and other cars with no cats.
Wade
I would recommend using the sensor at the end of the downpipe or just before the cat. Running a sensor at the stock location will damage some wideband sensors.
I still use a tailpipe probe for my own car and other cars with no cats.
Wade
06-27-02, 11:53 PM
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When tuning with my horriba widebands, I found that
any measurement down from the stock O2 sensor location would give approx 1/2 AFR richer reading. This
is also the case with piston cars especially like
single turbo supras. And yes this is very hard on sensors
but considering the cost of single turbo, highboost cars
its worth it.
any measurement down from the stock O2 sensor location would give approx 1/2 AFR richer reading. This
is also the case with piston cars especially like
single turbo supras. And yes this is very hard on sensors
but considering the cost of single turbo, highboost cars
its worth it.
