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CO Settings for Premuffler
I'm (hopefully) going to be replacing my cat with a euro premuffler (Fabspeed) this weekend.
Do I need to change my CO mixture settings for the premuffler? I'm currently running 3.3 - 3.4% with the O2 sensor disconnected. (I'm not sure the Lambda system is working properly so I have it disconnected for now until I get some time to go through it.) Is this a good setting for the premuffler or does it need to change?
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Matt. 83 911SC 85.5 944 NA - Sold |
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07-16-2010, 06:22 AM
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Join Date: Nov 2005
Location: Jersey Shore
Posts: 615
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I have read that when going to SSIs (perhaps similar to premuff) some need to richen a little, but youre up there already. I would run it and see how it does.
I had mine up near 3.5% for a few years which ran great, now its 3.0-3.2% which I like a little better. Even if the flow leans it a little, you may be fine given your starting point.
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Scott 1981 911SC Targa - Platinum Metallic |
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07-16-2010, 08:01 PM
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1983 Porsche 911SC
