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M2 Technical Topics > S55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Custom made exhaust with particulate filter delete

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      03-07-2019, 01:42 PM   #1
CSL335i
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Custom made exhaust with particulate filter delete

We have begun to fabricate our custom made exhaust system with OPF delete. As we intent to make a sportier, but not loud sound than the factory one including OPF, we:

- use one exhaust pipe until the end-muffler
- and put two pass-through resonator (bigger one and smaller one) to sort out
some noise
- will use of course exhaust valves and a well design end-muffler with
- carbon tail pipes.

More picture and sound file comes next days.

As for the software regarding OPFless, i have two solutions in my mind:
- install BM3 OEM CS software, which does not look for OPF
- use the factory software with MR's solution which somehow fools the ECU
(but has a side affect, as the ECU still wants to regenerate the non existen OPF. As far as I know ECU leans the air-fuel mixture to generate more heat and burn out the passive OPF.)


Best regards, Laszlo
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      03-08-2019, 04:26 AM   #2
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Can you post photos of the factory exhaust with OPF please. I want to see how the OPF looks like.
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      03-08-2019, 02:40 PM   #3
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Nice..

What is MRs fix?
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      03-08-2019, 03:58 PM   #4
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Quote:
Originally Posted by doughboy View Post
Nice..

What is MRs fix?
I think we will get to know something concrete by the end of the month
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      03-14-2019, 03:22 PM   #5
CSL335i
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Still in progress. Love the works for the back-end of the exhaust systems. Carbon end-tails will be fitted as well tomorrow.
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      03-15-2019, 11:26 AM   #6
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Finished the exhaust system. Video will be uploaded soon.
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      03-15-2019, 04:22 PM   #7
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Looks great, are you selling this or is it a one off?

Back to post 1, are you saying BM3 CS tune ignore OPF? Even when installed on EU Car?
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      03-15-2019, 10:19 PM   #8
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Looks solid.
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      03-16-2019, 10:28 AM   #9
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Quote:
Originally Posted by doughboy View Post
Looks great, are you selling this or is it a one off?

Back to post 1, are you saying BM3 CS tune ignore OPF? Even when installed on EU Car?
This is a one of exhaust.
Bm3 cs (oem) tune does not look
for DPF, as m3 cs does not have such this-
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