Removing 02s entirely?
08-06-2003, 12:54 AM
#1
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Removing 02s entirely? How hard is it to tune the car with no 02s at all? I know a couple of people have done this. Any problems associated with this?
08-06-2003, 03:01 PM
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Re: Removing 02s entirely?
I don't have oxygen sensors on my car. It is VERY easy to tune without the O2 sensors. In my opinion it is easier, on a modified car, without the O2 sensors.
08-06-2003, 05:18 PM
#6
Re: Removing 02s entirely? There are some downsides to no oxygen sensors.
Poorer fuel economy
Not emmissions legal
Tuning is not that different.
The only recommendation that I have is to make sure that you check you a/f ratio on the car after you have kicked it to open loop. You can do this on a dyno. At part throttle your a/f should be between 14.0 and 14.5 (preferrebly closer to 14). Stick it on the rollers and slowly go through the RPM range and different throttle combinations (don't go WOT) to check the a/f. It doesn't have to stay locked on at 14.3 but the a/f should always quickly recover into the 14's no matter what your doing.
You will need to use the injector flow rate table to make large changes to your a/f and the main VE table to make small changes to your a/f. You are going to have to log your MAP reading and convert it KPA, and RPM so that you can sergically alter your VE table.
Good Luck
Poorer fuel economy
Not emmissions legal
Tuning is not that different.
The only recommendation that I have is to make sure that you check you a/f ratio on the car after you have kicked it to open loop. You can do this on a dyno. At part throttle your a/f should be between 14.0 and 14.5 (preferrebly closer to 14). Stick it on the rollers and slowly go through the RPM range and different throttle combinations (don't go WOT) to check the a/f. It doesn't have to stay locked on at 14.3 but the a/f should always quickly recover into the 14's no matter what your doing.
You will need to use the injector flow rate table to make large changes to your a/f and the main VE table to make small changes to your a/f. You are going to have to log your MAP reading and convert it KPA, and RPM so that you can sergically alter your VE table.
Good Luck
08-06-2003, 10:14 PM
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Re: Removing 02s entirely? Cool, I'm gonna give it a try. Right now, I have a cylinder not firing, and it's making the PCM dump major fuel into that bank. I'm hoping this will let me have 7 good cylinders until I can track down the reason it's not getting spark.