07-29-2017, 02:39 AM | #1 |
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N47 Straight-Pipe?
I have a 2014 F30 328d xDrive and just watched a bunch of YouTube videos of other n47 diesels being straight-piped. I was told that the emissions systems are very delicate in these cars and that tampering with them can ruin the whole car and cost thousands to repairs. I've straight-piped many chevy cars and trucks by cutting the muffler off and replacing it with a piece of piping. I doubt it's that simple in this car? Or is it? I'd love to make the car sound more aggressive without buying some overpriced river sounding exhaust system. No offense to ricer fans, but it's just not my style. I like to be loud, proud, and aggressive. I do have the latest versions of ISTA/D and ISTA-P. Help me out here!
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07-29-2017, 08:43 AM | #2 |
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From a straight hardware standpoint, I think it will depend on how much you are willing to put up with CEL lights and the car's system notifying you that something isn't right if you cut out and bypass all the emissions controls.
There's probably a way to reprogram the car to knock the lights and notifications out, but I think there's a more pressing question here that many people are asking and would like to know... Why did you pick this car to do this to? A car that the manufacturer has deeply ingrained the emissions control systems. Don't take this as a flaming...but there are vehicles that lend themselves to this sort of modification so much more easily - almost as if the manufacturer purposely allowed for it to be done. |
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07-29-2017, 11:53 AM | #3 | |
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07-29-2017, 01:43 PM | #4 |
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1) ISTA doesn't do it.
2) You need a tune to remove the CEL and other stuff that will happen. 3) The DDE (ECU) in BMWs cannot be tuned/flashed while in the car: it needs to removed and "bench-tuned". 4) There are at least three things to remove: a) DPF/DOC, SCR Catalyst, Muffler. Check the e90post diesel subforum for experiences doing this for the earlier 335d. Poster TDIWyse was one of the first. |
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07-29-2017, 03:50 PM | #5 | |
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07-29-2017, 07:09 PM | #6 | |
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Good luck. |
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07-30-2017, 12:07 AM | #7 | ||
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07-30-2017, 03:42 PM | #8 | |
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However, I doubt you'll hear much of a difference. Even without the DPF and cats 4-cylinder diesels aren't that loud. I'm sure that DPF is going to deaden things quite a bit. At the very least you'll cut ~40lbs off your car's weight.. |
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08-04-2017, 09:10 AM | #9 |
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Having done this to my previous Powerstroke,(removed resonator and muffler behind cat) the truck (v8) was minimally louder at idle and lower revs. But once the rpm's hit about 4k, it became very apparent...almost like having an exhaust cutout installed.
I would imagine that it would be somewhat of the same with our cars. Only question is, would a straight pipe 4 banger diesel sound good? I know my old Honda sounded like CRAP back in the day when I drove it from my house to the muffler shop to have my custom exhaust built. Although also a 4 banger, not diesel.
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08-04-2017, 09:25 AM | #10 | |
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08-14-2017, 12:21 PM | #11 |
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Okay I found a new video and am absolutely amazed and shocked. I knew that bmw with dpf could roll coal but I never imagined they could roll as much as 24v Cummins lol watch this!!
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08-18-2017, 03:36 PM | #13 |
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What? You would need a dpf delete for even a little smoke and if you did get smoke with a dpf it clog it in a heartbeat and you would destroy it.
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08-18-2017, 03:37 PM | #14 |
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Oh sorry I thought you said there was no dpf delete on it. My bad
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08-18-2017, 03:38 PM | #15 |
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Exactly. Not sure why you said "What?". There's clearly no DPF on that car... |
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08-18-2017, 04:04 PM | #16 | |
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If the stock DP is intact, it shouldn't throw a code, but again I'm not 100% certain on that and knowing some here, I'll be corrected in a heartbeat if that's wrong, lmao. Don't think I'd personally ever go catless on a diesel though as evidenced by that video above, haha. Geesus that's a lotta black smoke! |
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08-18-2017, 04:43 PM | #17 | ||
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09-03-2017, 06:41 PM | #18 |
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Keep us posted as the DP hits the market.
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09-03-2017, 11:03 PM | #19 | |
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10-03-2017, 06:03 AM | #20 | |
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I bought my 328d CPO in April of this year. Love the car, coming from a mk6 TDI w/ DSG, but I have had 3 check engine light episodes and they have all been emission system related....This last one, according to my brother's "Carly" device is saying its related to DPF soot levels w/ a soot level of 15.82g (which other internet sources tell me is a normal amount, so not sure). I have 40,000mi on it and do mostly highway, conscious of not letting it sit and idol. Needless to say, aside from all the other benefits of deletes, I cannot wait for the kit to come out so I can stop stressing over CEL's. |
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