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BMW 3-Series (E90 E92) Forum
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DPF Delete
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10-24-2016, 02:47 PM | #2597 |
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This was a hell of a thread to read through-wowzers. You guys leave no stone un-turned. I found this thread after researching my own question I posted earlier about adding a cat to the dpf delete pipe. Buzzken sells their delete pipe with an optional add on cat (another $200 i think?). Was the consensus from this thread that people wish they were able to retain a cat in their downpipe for dpf replacement?
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10-24-2016, 06:06 PM | #2598 |
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I think in your last thread you mentioned it being a daily driver. I would say that getting a cat to reduce smell is well worth it. Also, I highly doubt having that one cat is going to affect your HP and TQ figures all that much.
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10-29-2016, 09:54 AM | #2599 |
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Probably not supposed to post here, but if someone on a budget is looking for the parts:
http://www.e90post.com/forums/showthread.php?t=1317982 |
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10-31-2016, 10:29 AM | #2600 |
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Honestly, the power and performance is great and all, but I want reliability in the form of "addition by subtraction". So for me, reducing smell by a little is great. I don't think it'll impact HP/TQ numbers, but wouldn't care even if it did.
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11-02-2016, 10:05 AM | #2601 |
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Update on the vibrant 1458 gasket that we spoke of many pages back. The part has been updated. It is still a 2 hole/3" application. The holes are now elongated. Before, they were slightly off alignment with the Ecotune pipe. Those of us that used it had to sort of force it and slightly deform the 2 small holes. I recall the spacing on the holes of gasket was slightly too big. Anyway, I picked up 2 more from Summit and the picture is attached. I commented in another thread but it belongs here in this "beast" of a thread.
Last edited by BB_cuda; 11-02-2016 at 11:40 AM.. |
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11-02-2016, 10:35 AM | #2602 |
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Guys, im sorry if its there somewhere in those 100 pages, but how does various temperatures and pressures change after the dpf delete? Are the egt and exhaust pressures still the same?
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11-03-2016, 12:39 PM | #2603 |
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Recently did the full turbo back exhaust and although it's nice driving with no SES light, the smell does get to me when I'm idling at red lights.
I'm looking to add a catalytic converter to help with the smell. http://www.idparts.com/inch-diesel-c...er-p-4969.html This one is relatively small in size compared to other ones I've seen out there and shouldn't have a problem being fitted to the exhaust. Just wondering if I should be concerned that soot will one day plug this thing up and where I should put it on the car? As close to the turbo as possible?
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11-03-2016, 12:44 PM | #2604 | |
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11-03-2016, 01:30 PM | #2605 | |
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Whether it will plug up would depend on the cells per in^2 spec. A race cat is around 100 to possibly 200 cell per in^2. The higher the cell count, the more restrictive the CAT. There are more space efficient CATS out there that would fit into down pipes. It's likely easier for you to buy another downpipe with the CAT already in it than to have one retrofitted into an already finished downpipe. http://mandrelbendingsolutions.com/h...ic-converters/ The above link has the smaller CATs I speak of but they are not diesel specific. Last edited by BB_cuda; 11-03-2016 at 01:48 PM.. |
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11-03-2016, 03:31 PM | #2606 | |
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11-03-2016, 04:19 PM | #2607 |
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I do notice it at traffic lights with the windows up assuming the fan is on, but it's intermittent. Maybe I am just inured to it at this point but it's really not that bad, it's not "cough cough" like my old Mercedes 300D, it's not the rotten eggs from the '76 Pinto you had with the early catalytic converters, but it's just a slightly odd smell.
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11-03-2016, 04:42 PM | #2608 | |
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11-04-2016, 07:40 AM | #2609 | |
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11-08-2016, 03:49 PM | #2610 | |
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My commutes are long and mostly highway, so my current process is leaving the heat off as I creep through traffic to the highway, and when I get to the highway, I turn on the heat. (Mornings are starting to get chilly where I'm from. I imagine AC will be another challenge in the summer.) I'm finding the smell doesn't really get into the car unless the vents are on and the windows are up. The smell definitely gets in with the windows down. Never knew how much of a difference the DPF/DOC makes, but I bought a 3" Cat for diesels from Eastern Catalytic and intend to have that welded to the car. Other ideas running through my head along with having a cat installed are converting my exhaust to a single exit out the passenger side and adding a resonator to quiet it down a little more. With regards to differences between Catalytic Converters for gasoline and diesel, my questions to manufacturers and research has lead me to conclude that they are different and not cross compatible as the materials needed for reaction differ between the two fuel types.
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11-08-2016, 05:44 PM | #2611 | |
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This is no different than being stuck behind someone's old school diesel at a light. My recirc door broke on the truck and I instantly noticed outside smell coming in. After door linkage problem was solved, the stink stopped coming in. |
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11-08-2016, 06:02 PM | #2612 |
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I'm interested in the discussion about the smell as I've see it brought up a fair amount. I'm hoping to straight pipe in the next month or two, coming from two deleted TDI's I have never noticed a smell in the car unless parked for an extended period with the windows down or standing outside the car. Maby I just didn't notice it, and to be honest I like the smell when standing by the car.... Is there anything that makes these cars smell more than other deleted diesel car?
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11-09-2016, 11:20 AM | #2613 | |
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I'll be putting on a cat to help with the smell. It's not something I like.
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11-09-2016, 11:33 AM | #2614 |
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This isn't a factual answer so take it with a grain of salt. Older diesels run at higher compression ratio (around 20:1). This should cause a higher burn temp. M57 is 16.5:1 as this burns cooler and should reduce NOx formation. My subjective reasoning is higher CR should result in more complete burn. TDI has commented before that his M57 smells way worse than his 2004 ram with cummins which is emission equipment free from factory. I recall that he says it is a common rail though. DWR, you're welcome to calibrate my statements if you ever look at this thread.
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11-09-2016, 01:03 PM | #2615 | |
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I think having a DOC with a controllable exhaust bypass would be pretty neat...
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11-09-2016, 01:28 PM | #2616 |
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My 12' Jetta had full deletes and that a 2.0 CR so I'm interested to see the difference between the two after I'm done. I agree, a DOC with a bypass would be a sweet touch for those who wanna cut back the smell
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11-09-2016, 02:04 PM | #2617 |
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When you say controllable exhaust bypass, you mean turbine bypass but always flowing through DOC, right?
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11-09-2016, 03:31 PM | #2618 |
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Just a comparison of the cat size from Eastern Catalytic that I plan on putting in the exhaust compared to the DPF.
I'm thinking I'll put it after the first bend off the down pipe so its easy to access should I ever need to hack it out to replace.
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2006 VW Jetta 2.5 Once upon a time... '03 VW GTI, '99 Audi A4 1.8TQ, '00 VW Jetta 1.85T, '09 BMW 335i xDrive, '04 BMW Z4 3.0i, '01 Audi TT 1.8T, '04 Volvo S80 2.5T Last edited by pbdm4k; 11-09-2016 at 03:53 PM.. |
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