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      09-29-2013, 02:54 AM   #485
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Ok guys did some more reading LOL. So check this out, this is what I am going to get done and I hope it sounds good if not oh well.

Keep in mind I have a E90. So I will replace my resonator delete with the magnaflow xpipe that was linked earlier in this thread. For the OEM mod I am going to remove 100% of the packing and wrap the perforated pipes in both mufflers with titanium heatwrap. JUST LIKE this guy did in his E90 M3.

http://www.m3post.com/forums/showthread.php?t=869384

Thoughts?
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      09-29-2013, 08:18 AM   #486
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Quote:
Originally Posted by 914kid View Post
Ok guys did some more reading LOL. So check this out, this is what I am going to get done and I hope it sounds good if not oh well.

Keep in mind I have a E90. So I will replace my resonator delete with the magnaflow xpipe that was linked earlier in this thread. For the OEM mod I am going to remove 100% of the packing and wrap the perforated pipes in both mufflers with titanium heatwrap. JUST LIKE this guy did in his E90 M3.

http://www.m3post.com/forums/showthread.php?t=869384

Thoughts?
I THINK that's a good idea. I would expect the titanium heatwrap to dampen some of the rasp that may occur with packing removed. I'm looking forward to hearing the results.
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      09-30-2013, 12:55 AM   #487
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Originally Posted by 914kid View Post
Ok guys did some more reading LOL. So check this out, this is what I am going to get done and I hope it sounds good if not oh well.

Keep in mind I have a E90. So I will replace my resonator delete with the magnaflow xpipe that was linked earlier in this thread. For the OEM mod I am going to remove 100% of the packing and wrap the perforated pipes in both mufflers with titanium heatwrap. JUST LIKE this guy did in his E90 M3.

http://www.m3post.com/forums/showthread.php?t=869384

Thoughts?
If you are gonna wrap it with heatwrap, please do not remove the packing, you will get a very hollow sound which is gonna create noise, not a nice tone. You can hear it from a few pages ago. The packing material is there to absorb sound and also assist the transfer of the wave from the exhaust pipe to the muffler housing. I had read a few muffler design patent which they specifically mentioned that packing material is critical in the transfer of sound wave.
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      09-30-2013, 02:58 PM   #488
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I would leave at least 50% packing. It has that tin can sound without packing.
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      09-30-2013, 05:28 PM   #489
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If I remember Tomz_M3 removed the packing (all of it) and replaced the pipes with non perforated pipes and his car sounded pretty nice.

Do you mean a honda civic tin sound? I am trying to avoid that sound at all costs, so 50% of the packing and wrap the pipes? Is wrapping the pipe and replacing with the straight pipe going to generate the same sound?

Confused again.
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      09-30-2013, 05:41 PM   #490
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Didn't we also say the PE has no packing and the is mufflers have 50% packing?
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      09-30-2013, 09:04 PM   #491
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Wow $200 just to cut open the muffler and remove the packing? What do you mean shop needs to know stainless steel welding, shouldn't ALL exhaust shops know that?

If you don't mind the welds looking like they were done by a 4-year old with a tube of JB Weld, then have any shop do it. From experience, most exhaust shops in my area aren't very good welding stainless steel or don't even want to touch it. Maybe things have changed in recent years.

OEM stainless steel is also a lower grade than the 304 SS that is in high-end aftermarket stuff. That might make it easier to weld, but I'm not sure. Properly welding stainless requires TIG welding as far as I know.

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So what is the consensus on modding E90 mufflers? I have catless DPs, secondary cats and stock resonator, looking for a good sound for a daily driver.

Remove all packing? Cover passenger side perforation? This thread is all over the place and I am no exhaust expert
I'll let you know tomorrow. I'm having my "is" mufflers welded in. My car is an E90 with catless downpipes, but stock secondary cats and E90 resonator. I'm thinking it will be perfect for a DD.
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      09-30-2013, 09:12 PM   #492
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If you don't mind the welds looking like they were done by a 4-year old with a tube of JB Weld, then have any shop do it. From experience, most exhaust shops in my area aren't very good welding stainless steel or don't even want to touch it. Maybe things have changed in recent years.

OEM stainless steel is also a lower grade than the 304 SS that is in high-end aftermarket stuff. That might make it easier to weld, but I'm not sure. Properly welding stainless requires TIG welding as far as I know.



I'll let you know tomorrow. I'm having my "is" mufflers welded in. My car is an E90 with catless downpipes, but stock secondary cats and E90 resonator. I'm thinking it will be perfect for a DD.
Make sure to post up vids after please
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      09-30-2013, 09:20 PM   #493
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Make sure to post up vids after please
I'll see what I can do. Don't have a GoPro yet.
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      09-30-2013, 09:34 PM   #494
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I'll see what I can do. Don't have a GoPro yet.
Iphone? I just really want to hear what they sound like with catless downpipes and the e90 resonator still in. Even a phone video revving the car a bit at a stop, then maybe put the phone somewhere and do a quick 1-3 pull driving away would be perfect and i'd really appreciate it. I just want to make sure I 100% want to try this before I invest money in having it all welded with new tips and whatnot
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      09-30-2013, 11:30 PM   #495
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If your gonna do it, don't forget the tone changer !
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      09-30-2013, 11:35 PM   #496
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Quote:
Originally Posted by 914kid
Didn't we also say the PE has no packing and the is mufflers have 50% packing?
You could trust speculation or someone who actually soaked the PE !

I'm still a bit behind on my project, but I'm confident to duplicate the PE tone. I'll post up video once I got a hold of a reputable welder in town.
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      10-01-2013, 08:31 AM   #497
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Iphone? I just really want to hear what they sound like with catless downpipes and the e90 resonator still in. Even a phone video revving the car a bit at a stop, then maybe put the phone somewhere and do a quick 1-3 pull driving away would be perfect and i'd really appreciate it. I just want to make sure I 100% want to try this before I invest money in having it all welded with new tips and whatnot

I actually think you're in luck. I'm going to pick up a GoPro this week, so I can get some actual clips while moving. I'll take a cold-start video and some revs, too.
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      10-01-2013, 10:13 AM   #498
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Quote:
Originally Posted by psmitty95 View Post
Iphone? I just really want to hear what they sound like with catless downpipes and the e90 resonator still in. Even a phone video revving the car a bit at a stop, then maybe put the phone somewhere and do a quick 1-3 pull driving away would be perfect and i'd really appreciate it. I just want to make sure I 100% want to try this before I invest money in having it all welded with new tips and whatnot

I actually think you're in luck. I'm going to pick up a GoPro this week, so I can get some actual clips while moving. I'll take a cold-start video and some revs, too.
That would be awesome. Thanks!
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      10-01-2013, 11:08 AM   #499
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Quote:
Originally Posted by bwco
Quote:
Originally Posted by 914kid
Didn't we also say the PE has no packing and the is mufflers have 50% packing?
You could trust speculation or someone who actually soaked the PE !

I'm still a bit behind on my project, but I'm confident to duplicate the PE tone. I'll post up video once I got a hold of a reputable welder in town.
What were your results again and what exactly did you do? Can't seem to search your old posts.

Also what is tone changer? Picture you posted won't load lol.
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      10-01-2013, 12:14 PM   #500
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Quote:
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What were your results again and what exactly did you do? Can't seem to search your old posts.

Also what is tone changer? Picture you posted won't load lol.
The tip change the tone, basically it's a 16 gauge 80 mm 304 stainless steel pipe.
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      10-01-2013, 01:47 PM   #501
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Is that an exgaust tip or tip for replacing the perforated pipes?

And what were your results with the PE water test? 50%. Please share haha
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      10-01-2013, 02:37 PM   #502
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I'm using it to replace the last 6 inch of the exhaust.

I'm not sure how much packing is in the PE, but it's definitely there !
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      10-01-2013, 03:09 PM   #503
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Quote:
Originally Posted by BMWM.D. View Post
I actually think you're in luck. I'm going to pick up a GoPro this week, so I can get some actual clips while moving. I'll take a cold-start video and some revs, too.
Did you wind up getting it done? If so how's it sound?
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      10-02-2013, 02:53 PM   #504
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on my E92,my pre cata are empty, and i ve got bmw perfomance exhaust.

on 92 no intermediary silencious so i've already only stock cata secondary, but noise is really true present, what advice else you can i put to reduce a little the noise ??

sorry for my english l'm french
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      10-02-2013, 05:18 PM   #505
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^ Majority of the people here are looking to increase the noise level, but your looking to reduce the noise level?

Guess the easiest way for you to do is, swap your Performance exhaust with someone who has the stock non-performance exhaust.
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      10-02-2013, 07:32 PM   #506
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on my E92,my pre cata are empty, and i ve got bmw perfomance exhaust.

on 92 no intermediary silencious so i've already only stock cata secondary, but noise is really true present, what advice else you can i put to reduce a little the noise ??

sorry for my english l'm french

So you have a Performance Exhaust. Do you have any cats on the car?
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