02-29-2024, 08:45 PM | #1 |
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Emissions monitors to ready for track
Say that a friend theoretically wanted to have a catless down pipe on their car for the track but they didn't want to use the CEL fix in bm3 or mhd. But they want to get rid of the cel and have emissions monitors say ready, again for the track so they know if anything is wrong. Has anyone in a similar situation found a work around? Again, for the track. Off-road use
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02-29-2024, 11:21 PM | #3 |
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You may/may not (doesn’t work for everyone) get the cel to turn off with either one of these: (1) post-O2 extenders (straight and/or 90 deg, some people stack two of them) or (2) a mini cat for each post-O2 sensor that mounts between the O2 sensor and exhaust. BM3 has stated leaving either of these devices attached long term will throw off fuel trims.
The f8x stock cats flow well enough that you can run a stage 2 tune with them. So why do you want to remove them? IMO, removing stock cats may increase the loudness of a stock exhaust but the sound is horrible with significant rasp and drone. |
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03-01-2024, 11:24 AM | #4 | |
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03-01-2024, 12:47 PM | #5 |
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03-01-2024, 01:05 PM | #6 |
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theweebabySeamus376.00 |
03-01-2024, 01:47 PM | #8 |
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03-01-2024, 01:56 PM | #9 | |
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https://f80.bimmerpost.com/forums/sh...2&postcount=18 Considering trying as this Swede seems to have run this method for 3 years + Full thread: https://f80.bimmerpost.com/forums/sh...e+2+stock+cats |
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theweebabySeamus376.00 |
03-01-2024, 06:01 PM | #10 | |
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03-03-2024, 09:16 PM | #11 |
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03-03-2024, 09:17 PM | #12 | |
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