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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 02-27-2011, 09:54 AM   #41
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The 02 sims are working great for me still. 2 years and counting.
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Old 02-27-2011, 10:18 AM   #42
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TXZHP....Are you running the stock ZHP exhaust? I am interested to see if the exhaust note is changed in any way with these headers.
Yes, and so am I....
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Old 02-28-2011, 10:37 PM   #43
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Cats arrived today. Overall they look pretty decent, not exactly Kromer Kraft workmanship, but decent. I'm a bit disappointed in the interior interface between the flange and primaries, especially at this price point. If these were $50 ebay sourced headers I would understand. Once I get pics up you guys can tell me what you think. I suppose it might be possible to do some fill welding and then grind it back down to make a smooth interior transition but I'm not sure how much difference it would really make with cats in the flow.

No time to get any pics up tonight but I should be able to post pics and weights tomorrow night.

Anyone have stock manifolds just laying around that could take some pics of the interior flange-primary interface for comparison to these MagnaFlow units? Would also like to get some measurements on the size of the ports cut into the stock flanges for comparison.
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Old 02-28-2011, 11:25 PM   #44
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Originally Posted by TxZHP04 View Post
Cats arrived today. Overall they look pretty decent, not exactly Kromer Kraft workmanship, but decent. I'm a bit disappointed in the interior interface between the flange and primaries, especially at this price point. If these were $50 ebay sourced headers I would understand. Once I get pics up you guys can tell me what you think. I suppose it might be possible to do some fill welding and then grind it back down to make a smooth interior transition but I'm not sure how much difference it would really make with cats in the flow.

No time to get any pics up tonight but I should be able to post pics and weights tomorrow night.

Anyone have stock manifolds just laying around that could take some pics of the interior flange-primary interface for comparison to these MagnaFlow units? Would also like to get some measurements on the size of the ports cut into the stock flanges for comparison.
Sorry to hear they do not meet your expectations!! I have my stock headers in the garage. Once you post some pics, I will try to take some pics at the same angles.
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Old 03-01-2011, 08:01 PM   #45
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Old 03-01-2011, 09:54 PM   #46
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Combined weight: 13.9 lbs ( vs 26.1 for stock )

Photos from various angles:






















Weight reference for the stock manifolds:
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Old 03-02-2011, 09:33 AM   #47
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Sweet. Can't wait to see how they do. Let me know when you want to go dyno. I get a good rate at LG.
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Old 03-02-2011, 10:31 AM   #48
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Anyone happen to have the dimensions of the exhaust ports in the head?
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Old 03-02-2011, 11:10 AM   #49
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Waits for Adam's reply...

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Anyone happen to have the dimensions of the exhaust ports in the head?
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Old 03-02-2011, 11:25 AM   #50
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It's not that they don't "work" for some people, but I'm betting that if you did a monitor readiness reading you'd have 2 that don't pass.

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The 02 sims are working great for me still. 2 years and counting.
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Old 03-02-2011, 12:30 PM   #51
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Waits for Adam's reply...
Already PM'd him. He doesn't have them available to him at the moment... but he's definitely the right guy. I just managed to dig up this old post so I should be able to infer what I need.

http://forum.e46fanatics.com/showpos...3&postcount=92
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Old 03-02-2011, 04:05 PM   #52
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"the interior interface between the flange and primaries"

This will have an effect IF the primary tubing inside the flange is outside or inside the outer edge of the exhaust ports on the head. Just a matter of measuring to find out.

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Old 03-02-2011, 04:42 PM   #53
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"the interior interface between the flange and primaries"

This will have an effect IF the primary tubing inside the flange is outside or inside the outer edge of the exhaust ports on the head. Just a matter of measuring to find out.

Jim
Thanks. My hope, based on feedback from Adam (and to be confirmed with measurements), is that the primary tubing is larger than the exhaust ports.
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Old 03-02-2011, 04:47 PM   #54
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He's told me the same thing, and I would imagine they would be.

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Thanks. My hope, based on feedback from Adam (and to be confirmed with measurements), is that the primary tubing is larger than the exhaust ports.
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Old 03-07-2011, 09:57 AM   #55
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can't wait for the dyno results.
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Old 03-16-2011, 08:41 AM   #56
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Any update?

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Old 03-16-2011, 09:54 AM   #57
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Any update?

Jim
No, I've been too busy with work lately to make any progress on this. I'd expect at least another 6-8 weeks before I have them installed. I think I'm going to see about getting Swain to coat them and I have no idea yet what their turnaround time on that might be so it could be even longer.
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Old 03-24-2011, 12:42 PM   #58
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Small update for you guys. Several of the cylinders had gaps between the primary pipes inside the flange that bugged me and, on 2 cylinders, part of the primary actually protruded 1-2 mm beyond the mating surface of the flange. I was able to reshape the edge of the primaries a little so that they lay flat inside the flange cutouts and then ground down the extra material to ensure that the flange is able to properly seat against the head. Got them boxed back up and shipped off to Swain for coating. Should have them back within about a month. Hopefully I can make time for a dyno session between now and then.
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Old 03-24-2011, 01:10 PM   #59
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Dyno sheets would be great
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Old 03-24-2011, 01:11 PM   #60
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Excellent! Hit me up when you go to the dyno. I'll join you.

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Small update for you guys. Several of the cylinders had gaps between the primary pipes inside the flange that bugged me and, on 2 cylinders, part of the primary actually protruded 1-2 mm beyond the mating surface of the flange. I was able to reshape the edge of the primaries a little so that they lay flat inside the flange cutouts and then ground down the extra material to ensure that the flange is able to properly seat against the head. Got them boxed back up and shipped off to Swain for coating. Should have them back within about a month. Hopefully I can make time for a dyno session between now and then.
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