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      11-18-2013, 11:14 AM   #1
greg135is
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Exhaust & engine running lean

Has anyone experienced this after installing a berk muffler delete or any other hi-flow muffler?? Was wondering because I read some info that said hi-flow exhaust alters engine timing and other engine characteristics.
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      11-18-2013, 12:35 PM   #2
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How do you know the motor is running lean? The DME targets lambda and AFR will adjust as is needed to meet that. There is nothing AFR related happening post downpipes; your choice of mid pipes and axle back will have no effect on that. So swapping a new muffler in is not going to cause a lean condition.
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      11-18-2013, 12:37 PM   #3
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Quote:
Originally Posted by 135Pats
How do you know the motor is running lean? The DME targets lambda and AFR will adjust as is needed to meet that. There is nothing AFR related happening post downpipes; your choice of mid pipes and axle back will have no effect on that. So swapping a new muffler in is not going to cause a lean condition.
Thanks for your personal input learning every little bit of info a day helps a lot.
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      11-18-2013, 01:13 PM   #4
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Quote:
Originally Posted by 135Pats View Post
How do you know the motor is running lean? The DME targets lambda and AFR will adjust as is needed to meet that. There is nothing AFR related happening post downpipes; your choice of mid pipes and axle back will have no effect on that. So swapping a new muffler in is not going to cause a lean condition.
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      11-18-2013, 01:28 PM   #5
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Greg, would you might sharing where you read this? Sounds like someone who doesn't know what they're talking about at all, or some edge case where a very specific set of circumstances could lead to running lean (i.e. some specific car has a weak/barely sufficient fuel system).
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