Killing your cat
OK, so I was looking at what 3Bar said on another thread, which was:
"Actually, a CEL will come on if you delete the cat on any of the Stage kits (remember what I keep saying about passing the sniffer?). All the Stage kits run just fine with it in there, and cats don't degrade if you push more air through them. So doodling around town, the cat works just fine and keeps the tailpipe squeaky clean. Up top, the fuel goes open-loop anyhow and catalyst efficiency drops whether or not you have a Stage kit. Fortunately emissions isn't regulated up there - not that any car could stay squeaky clean at peak power, turbo or not.
If you were serious about power, and cared not about emissions compliance - a 2.25" straight through (race pipe) is more than fine with the stock turbo. However, a bigger turbo will want something bigger - the Stage 3 doesn't make any more power on the SRT with a 3". A PT installation might be different (because of the extra bends), but I think most 2.5" systems are fine. The O2 housing (what I call the downpipe) is not really that restrictive - it's something you'll change if you are after every last BHP, but your money is better spent upgrading to the Stage 3 turbo housing."
I live in an area in which there is no emmisions testing done....for now.I am interested in removing the cat, but it appears from 3Bar's post that if you gut or remove the Cat to install a racepipe, your CEL will come on. I assume this is not detrimental to the car, it's just saying 'Hey, this s**t ain't working right!'.
Is there any way to use a series of resistors on the O2 plug to trick the PCM into seeing the voltages it wants to see to be happy from that O2 sensor, with it being a heated O2?
Anyone here gutted/removed their Cat and not had a CEL/MIL come on, or a code set?
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