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09-29-2012, 11:09 PM | #1 |
Scooby Newbie
Member#: 264713
Join Date: Nov 2010
Location: cleveland
Vehicle:04 wrx psm |
Exhaust lean or rich?
Does a full exhaust cause a car to run rich or lean or neither?
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09-29-2012, 11:18 PM | #2 |
Scooby Specialist
Member#: 274499
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: RI
Vehicle:1994 5.8T Cobra 755rwhp @ 16psi |
Theoretically it can adversely effect fueling based on changing responce time of O2 sensors... However a tune is required on 03+ WRX/STi's due to boost control and CL/OL transition issues..... NOT whether or not the car will run lean/rich.
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10-03-2012, 01:00 PM | #3 |
Scooby Newbie
Member#: 264713
Join Date: Nov 2010
Location: cleveland
Vehicle:04 wrx psm |
This is an na 2.5 forester with borla headers and cousin catback
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10-04-2012, 11:29 PM | #4 |
Scooby Guru
Member#: 140444
Join Date: Feb 2007
Chapter/Region:
NWIC
Location: Near Seattle, WA
Vehicle:05 Stage Free LGT ATP 3076, 6MT, AVO FMIC |
If your car has a MAF sensor, then exhaust changes shouldn't affect the mixture.
In theory, anyway. Practice doesn't always match theory. |
10-07-2012, 03:11 PM | #5 |
Scooby Newbie
Member#: 264713
Join Date: Nov 2010
Location: cleveland
Vehicle:04 wrx psm |
custom catback and it has map not maf does that mean it is effected.
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10-09-2012, 04:21 AM | #6 |
Scooby Guru
Member#: 140444
Join Date: Feb 2007
Chapter/Region:
NWIC
Location: Near Seattle, WA
Vehicle:05 Stage Free LGT ATP 3076, 6MT, AVO FMIC |
I dunno. Best way to find out would be to make some data logs and see what they say.
I don't know how accurate the stock O2 sensor is on naturally aspirated Subarus, but it might be possible to get a rough idea just from looking at the data. |
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