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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Wed, Feb-15-2017, 06:47:08 PM   #21
HassanEido
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Default Re: My custom exhaust journy begins

Quote:
Originally Posted by Mr. Wolfe View Post
Man, this sounds so good. I am trying to find the perfect exhaust for my cammed CSL box'd setup. Right now I am running SS stepped headers to SS catless section 1, SS x-pipe, to stock muffler.

Mr. Wolfe
Thanks for the kind words,I'm catless too btw she's absolutely tame untill I get on it. A refined/mellow stereo base tone while driving normally, no drone at all, similar to what a stock mufflered v8 545 e39 sounds like maybe? Maybe a smidge more. You can hear some muscle but not annoying by any means,enough to make it enjoyabale. Even on long drives. I found my daily commute much more enjoyable as my hour long drive home was nerve racking with what seems now to be a droney older muffler the worst part was random buzzing items in the door cards, like a pair of sunglass or a screw that I have in left somewhere in the ash tray,or an empty deoderant can in the glove box ratteling against something once I reach 2.5k rpm or so. Glad that's over.
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Mods:
-Custom CF airbox
-SSV2 catless headers, Custom 2.5" dual sec1, Custom sec2 2.5" dual with e9xM X pipe, SuperSprint Race inspired custom section 3..
-Cat Cams 280 272.
-Custom dyno tune
-Tms pulleys and electric fan conversion
364.1 whp 287.8 wtq

Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180
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Old Wed, Feb-15-2017, 06:50:51 PM   #22
nickpiper12
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Default Re: My custom exhaust journy begins

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Originally Posted by stash1 View Post
Nick, where you been!? You need one of those new cf d/s's!

Meh, lol. Other projects and track days to pay for. Need more data anyways, personally.
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2000 E46 "M3T" 6MT | Steel Grey/Tanin Red
2011 E91 Touring Sport 6AT | Alpine White/Chestnut Brown
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Old Wed, Feb-15-2017, 07:01:24 PM   #23
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Default Re: My custom exhaust journy begins

I am pretty sure BMW designed the cars with dual pipes because of sound. Single pipes, are not great for sound on this car. I know, when I went to a custom 3.5" single that the drone/tone/sound levels became unbearable. That was also going thru a 24" muffler 3.5" single in to 2.5" out, the sound still sucked. Yes, 3.5" single will give the greatest performance, but I believe a true 2.5" dual, headers to tips, with an X-pipe will not be that much different in performance but a hell of alot better in drone/tone/sound levels. That is going to be my next setup.

The SS step header V1 is a true 2.5" piping and connects to 2.5" piping on a section 1 then drops down to 2.36" going into Section 2. This is proven to be the greatest setup in terms of power and sound for the e46 m3.

Also I want to say that I am F/I with a supercharger.

Last edited by bmw m3 s50; Wed, Feb-15-2017 at 07:05:10 PM.
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Old Wed, Feb-15-2017, 07:11:25 PM   #24
HassanEido
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Default Re: My custom exhaust journy begins

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Originally Posted by bmw m3 s50 View Post
I am pretty sure BMW designed the cars with dual pipes because of sound. Single pipes, are not great for sound on this car. I know, when I went to a custom 3.5" single that the drone/tone/sound levels became unbearable. That was also going thru a 24" muffler 3.5" single in to 2.5" out, the sound still sucked. Yes, 3.5" single will give the greatest performance, but I believe a true 2.5" dual, headers to tips, with an X-pipe will not be that much different in performance but a hell of alot better in drone/tone/sound levels. That is going to be my next setup.

The SS step header V1 is a true 2.5" piping and connects to 2.5" piping on a section 1 then drops down to 2.36" going into Section 2. This is proven to be the greatest setup in terms of power and sound for the e46 m3.

Also I want to say that I am F/I with a supercharger.
Yeah I suppose it necks down to 2.36 to connect to the stock section 2.. I also suppose that's why most AM single mid pipes are only 3"s. Do you have 2 resonators in your section 1?
I agree that true 2.5s are likely to do the same job albeit with a bit more weight. After all, the e92 with 420 hp came with dual 2.5s and an X from factory I'm still debating what to do to be honest. An e92 style setup might still be the way to go
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Mods:
-Custom CF airbox
-SSV2 catless headers, Custom 2.5" dual sec1, Custom sec2 2.5" dual with e9xM X pipe, SuperSprint Race inspired custom section 3..
-Cat Cams 280 272.
-Custom dyno tune
-Tms pulleys and electric fan conversion
364.1 whp 287.8 wtq

Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180

Last edited by HassanEido; Wed, Feb-15-2017 at 07:15:24 PM.
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Old Wed, Feb-15-2017, 07:17:53 PM   #25
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Default Re: My custom exhaust journy begins

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Originally Posted by nickpiper12 View Post
Meh, lol. Other projects and track days to pay for. Need more data anyways, personally.
Nothing wrong w/saving for track days! No worries buddy...but I guarantee you that you could get around those GT3's w/one-lol. Alright, don't wanna sidetrack Hassan's thread anymore-lol
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Old Wed, Feb-15-2017, 07:21:26 PM   #26
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Default Re: My custom exhaust journy begins

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Originally Posted by HassanEido View Post
Yeah I suppose it necks down to 2.36 to connect to the stock section 2.. I also suppose that's why most AM single mid pipes are only 3"s. Do you have 2 resonators in your section 1?
No, You misunderstood. I have a 3.5" from Headers back til my Muffler, where it goes 3.5" then out to dual 2.5".

I have a single 3.5" resonator, which I feel does nothing.

I got the setup because I thought of going turbo in the future which I will not being doing now. The 3.5" with the turbo helps with sound because the turbo acts as a muffler sorta. 3.5" on an N/A or S/C with nothing there it makes it worse.

I am pretty sure the true dual 2.5" all the way back to tips is the way to go. There are 2.5" mid-pipes out there but it always bottle necks at the muffler because all mufflers are standard piping which is 2.36".
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Old Wed, Feb-15-2017, 07:29:22 PM   #27
HassanEido
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Default Re: My custom exhaust journy begins

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Originally Posted by bmw m3 s50 View Post
No, You misunderstood. I have a 3.5" from Headers back til my Muffler, where it goes 3.5" then out to dual 2.5".

I have a single 3.5" resonator, which I feel does nothing.

I got the setup because I thought of going turbo in the future which I will not being doing now. The 3.5" with the turbo helps with sound because the turbo acts as a muffler sorta. 3.5" on an N/A or S/C with nothing there it makes it worse.

I am pretty sure the true dual 2.5" all the way back to tips is the way to go. There are 2.5" mid-pipes out there but it always bottle necks at the muffler because all mufflers are standard piping which is 2.36".
Oh I thought you had the street style single 3.5 that retains section 1 and only replaces 2 /3 . Yeah I can see that being a pain. For a turbo setup I think a 4 inch might be best 3.5 inch is a bit restrictive so if you ever go about turboing it consider 4
I think dual 3s might be a good option for you if you are pushing 500 hp and above. Don't know about sound though. 2.5s will cover sub 500 hp power levels or so
__________________

Mods:
-Custom CF airbox
-SSV2 catless headers, Custom 2.5" dual sec1, Custom sec2 2.5" dual with e9xM X pipe, SuperSprint Race inspired custom section 3..
-Cat Cams 280 272.
-Custom dyno tune
-Tms pulleys and electric fan conversion
364.1 whp 287.8 wtq

Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180
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Old Wed, Feb-15-2017, 07:30:13 PM   #28
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Default Re: My custom exhaust journy begins

2.5" dual all the way will retain the raspy/metallic/tin note. It's also pretty costly for most people, nothing really exists out there.

My sound level is perfect with no drone.
-SS V1 Stepped
-SS V1 Stepped S-Pipe (2 resonators)
-Dual 2.5" to 3.5" single Y-Pipe
-BW 3.5" out with 17" Borla muffler.

My guess is most people can't get over the single exit, but I guess it doesn't bother me. My custom single 3.5" X-Pipe into a SS Street muffler had terrible drone, couldn't stand it.
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2011 E91 Touring Sport 6AT | Alpine White/Chestnut Brown
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Old Wed, Feb-15-2017, 07:38:51 PM   #29
HassanEido
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Default Re: My custom exhaust journy begins

Quote:
Originally Posted by nickpiper12 View Post
2.5" dual all the way will retain the raspy/metallic/tin note. It's also pretty costly for most people, nothing really exists out there.

My sound level is perfect with no drone.
-SS V1 Stepped
-SS V1 Stepped S-Pipe (2 resonators)
-Dual 2.5" to 3.5" single Y-Pipe
-BW 3.5" out with 17" Borla muffler.

My guess is most people can't get over the single exit, but I guess it doesn't bother me. My custom single 3.5" X-Pipe into a SS Street muffler had terrible drone, couldn't stand it.
Yes im thinking drone is a function of muffler design above all. I have two mufflers 16 and 15 inches, it was ridculously loud when we started it with no muffler on. Chest vibrating kind of loud hahaha. Can't imagine it doing worse with 3.5 mid and an extra res in sec1 and the same muffler. Decisions decision hehe
__________________

Mods:
-Custom CF airbox
-SSV2 catless headers, Custom 2.5" dual sec1, Custom sec2 2.5" dual with e9xM X pipe, SuperSprint Race inspired custom section 3..
-Cat Cams 280 272.
-Custom dyno tune
-Tms pulleys and electric fan conversion
364.1 whp 287.8 wtq

Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180
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Old Wed, Feb-15-2017, 08:02:45 PM   #30
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Default Re: My custom exhaust journy begins

Quote:
Originally Posted by HassanEido View Post
Oh I thought you had the street style single 3.5 that retains section 1 and only replaces 2 /3 . Yeah I can see that being a pain. For a turbo setup I think a 4 inch might be best 3.5 inch is a bit restrictive so if you ever go about turboing it consider 4
I think dual 3s might be a good option for you considering the power level you are at. 500 hp and above requires dual 3s Don't know about sound though.
Honestly, I don't think you will need dual 3". A true 2.5" will flow pretty good. Remember, when it comes to exhaust, it is not all about pipe size. The way the the entire system interacts with each part is the biggest factor with making power and sound.
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Discussing My custom exhaust journy begins in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)