B&B Midpipe and catback installed
03-17-2004, 10:50 AM
#26
Registered User
Originally posted by UK RX-8er
Hi Huff, I thought that the car needed a certain reading from the fore and aft O2 sensors to adjust the mixture accordingly. By removing the cat, the aft sensor must be making the car run wrong? No?
I am trying to figure this out as here in the UK there are very few people that have even slightly touched on this area with the RX-8, so not much info available. My car goes in tommorrow (wednesday) to have a custom 3.5" stainless steel system made. There we be 3 different systems made for the car with dyno tests. We are planning a full race system (very noisey), a road system and then the cat removal pipe. From this we will be able to see from the 6 different configurations:
1: Standard.
2: Standard back box, with cat removal.
3: Race back box.
4: Race back box, cat removal.
5: Road back box.
6: Road back box, cat removal.
What each does to the power in different places on the power curve etc etc. They will all be dyno'd on the same day, so this will show us the best configuaration.
The only problem so far is that by not 'fooling' the rear O2 sensor the car might over or under fuel and give wrong power readings?
These are all speculations as we do not know anything about this car in terms of performance mods.
Can anybody help with any info on any of this? Please.
Ant.
Hi Huff, I thought that the car needed a certain reading from the fore and aft O2 sensors to adjust the mixture accordingly. By removing the cat, the aft sensor must be making the car run wrong? No?
I am trying to figure this out as here in the UK there are very few people that have even slightly touched on this area with the RX-8, so not much info available. My car goes in tommorrow (wednesday) to have a custom 3.5" stainless steel system made. There we be 3 different systems made for the car with dyno tests. We are planning a full race system (very noisey), a road system and then the cat removal pipe. From this we will be able to see from the 6 different configurations:
1: Standard.
2: Standard back box, with cat removal.
3: Race back box.
4: Race back box, cat removal.
5: Road back box.
6: Road back box, cat removal.
What each does to the power in different places on the power curve etc etc. They will all be dyno'd on the same day, so this will show us the best configuaration.
The only problem so far is that by not 'fooling' the rear O2 sensor the car might over or under fuel and give wrong power readings?
These are all speculations as we do not know anything about this car in terms of performance mods.
Can anybody help with any info on any of this? Please.
Ant.
I haven't noticed any obvious loss of power or an added rich condition or limp mode. I'd say that it sounds like the test your planning to do would be much anticipated info for every one on the board. Keep us posted with your results.
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