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Registered
Join Date: Sep 2007
Posts: 5
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Cat bypass with o2
1987 02 sensor frozen no need for cat, what can I expect,installing Brush bypass
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08-07-2015, 12:45 PM
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Hi
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will probably run rich.
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"A good sense of humor is the best thing to have in your toolbox when working on these cars." Quote by Charles Freeborn, Pelican. |
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08-07-2015, 01:02 PM
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Fleabit peanut monkey
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Expect a little less back pressure. A touch more favorable rumble. Maybe a few ponies.
Make absolutely sure flanges are sealed upstream of the sensor. I have used two factory gaskets with $8 muffler paste from the local store.
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1981 911SC Targa |
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08-07-2015, 01:02 PM
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Registered
Join Date: Jul 2004
Location: San Diego, CA
Posts: 198
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a lot more stink at start up. i liked the sound better with the cat bypass. i thought i could feel a little more oomph, but now having gone back to the cat for smog, i'm thinking no noticeable difference...
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1983 911SC Cab |
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08-07-2015, 01:58 PM
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Reiver
Join Date: Nov 2011
Posts: 57,378
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A bit more noise and a bit more smoke/fumes on start up. You might get a few HP but only at WOT...most confuse the noise for HP.
If you notice a big difference it's because your cat has partially failed and is clogged. You will lose a big hot spot next to your cam cover tho.
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De Oppresso Liber Strength and Honor 5th Legion |
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08-07-2015, 03:10 PM
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Gretchen
1981 Porsche 911 SC Targa
