Wideband O2 Tuning After the Cat Possible?
06-18-2003, 08:10 AM
#1
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Join Date: Jul 2002
Location: Phoenix, AZ
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Wideband O2 Tuning After the Cat Possible?
Going to get my car dyno'ed this weekend and they have a wideband.
I assume since the cat is designed to eliminate emissions, it is using 02 not burnt in the exhaust to do this. Well, if a wideband is being used to tune, how do you get the correct AFR after the cat? is there some compensation that must be taken into account?
Thanks,
Ben
I assume since the cat is designed to eliminate emissions, it is using 02 not burnt in the exhaust to do this. Well, if a wideband is being used to tune, how do you get the correct AFR after the cat? is there some compensation that must be taken into account?
Thanks,
Ben
06-20-2003, 07:46 PM
#4
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Join Date: Mar 2002
Location: San Juan PR
Posts: 3,083
The cat will re burn the mixture giving you false lean condition...
That is why on OBDII cars there is a post cat o2... to make sure that the cat is working...
Weld a bung before the cat and insert the wideband there.
That is why on OBDII cars there is a post cat o2... to make sure that the cat is working...
Weld a bung before the cat and insert the wideband there.
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