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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 12-21-2014, 03:00 PM   #1
Chrsb5
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Schmiedmann from Denmark. headers w/ cats. Anyone ever hear of them?

While perusing the latest issue of Roundel magazine I came across a full page add for Schmiedmann, a BMW tuner/parts house out of Denmark. What really caught my attention are theses,


http://www.schmiedmann.com/en/high%2...xt.aspx?ppp=10

Headers with cats for $725 and about $90 for shipping. Past experience with trying to spoof the ECU or move the O2 sensors out of the exhaust stream on catalyst-less cars has been the lone factor stopping me from going with a set of ebay or bimmerbrakes headers for the last several years on my 330i, and cost has been the limiting factor when it comes to other aftermarket headers like Supersprint that run about $2800 for the catted version.

Now the question(s) Has anyone ever even heard of these guys ? or used any of their products ?

The website states "(Please note in order to make the system fit on 6 speed models - the catalysts has to be moved more to the rear in order to create space for the longer transmission, the pipes for the lengthening is not included in the kit"
So this mean some fab work, am I correct in thinking that pretty much any muffler/exhaust shop could handle the work ?

What about the cats being so far down the pipes and away from the factory, next to the head location, will this present a problem with the cats getting up to operating temp and working as intended ?

Last edited by Chrsb5; 12-21-2014 at 03:11 PM.
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Old 12-21-2014, 04:22 PM   #2
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Interesting. You also have the option of doing headers and a LC2 wideband to pass smog if theres no sniffer
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Old 12-21-2014, 04:28 PM   #3
jared_wiesner
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I've toyed with the idea of just the headers but I'd like to see more evidence of their flow potential.
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Old 12-21-2014, 09:18 PM   #4
Chrsb5
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Quote:
Originally Posted by CarbonZHP View Post
Interesting. You also have the option of doing headers and a LC2 wideband to pass smog if theres no sniffer
No sniffer test here and I've read about using a LC2 and keeping the O2 sensors wired in and in a metal electrical outlet box under the hood. I haven't seen any sort of definitive guide to either installation or configuration of the LC2 to provide expected numbers to the ECU. Do you have links ?

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Originally Posted by jared_wiesner View Post
I've toyed with the idea of just the headers but I'd like to see more evidence of their flow potential.
If I were to reach out to Schmiedmann, what are the right questions to ask regarding flow? It is measured in CFMs?
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Old 12-22-2014, 12:12 AM   #5
jared_wiesner
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Schmiedmann from Denmark. headers w/ cats. Anyone ever hear of them?

Quote:
Originally Posted by Chrsb5 View Post

If I were to reach out to Schmiedmann, what are the right questions to ask regarding flow? It is measured in CFMs?

No headers are not normally flowed using any sort of static measurement. A lot of what makes a good header is pulse scavenging to achieve optimal flow and that depends on a lot of factors that vary based on application. To make things simple, what I should have said is: I'd be curious what kind of power the headers make on their own. But the problem with asking for that data from Schmiedmann is that they can very easily skew the test to make their product look better than it is. Further, what headers do on a stock m54 could be pretty much the same result as other headers but in higher levels of preparation one type may show superiority as more flow is required. What really would need to happen to know for sure, is that more people in the community would need to be running the headers on various applications to see where (and if) they perform well. Essentially, we need Guinea pigs.
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Old 12-22-2014, 01:05 AM   #6
daniel_f.
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Well, i donīt own it but i know a guy who owns it:

http://www.e46fanatics.de/test-und-f...rkruemmer.html
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Last edited by daniel_f.; 12-22-2014 at 01:07 AM.
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Old 12-22-2014, 01:49 AM   #7
jared_wiesner
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Well, i donīt own it but i know a guy who owns it:

http://www.e46fanatics.de/test-und-f...rkruemmer.html

Unfortunately no dyno, just impressions. But, interesting still. Thanks Daniel.
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Old 12-22-2014, 02:12 AM   #8
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Dyno testing is not very common here in germany, sadly.
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