BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      05-24-2012, 01:00 AM   #1
firechicken99
Major
11

 
Drives: Black '07 335i
Join Date: Mar 2011
Location: United States


Posts: 1,032
iTrader: (0)

Thoughts of a race day exhaust, 3" bullet off the mid pipe dumped pre-axle

So after my HPDE I was thinking about how much I would love to get an exhaust on my 1'er even at least for just track days. The glorious $2500+ systems out there which I would love to purchase frankly aren't in my budget at the moment. I was considering getting an N55 midpipe and having it setup with the two pipes collecting into a 3" bullet and dumping under the car or out the side. Would provide some better flow (and noise ) for race days and I could easily swap back in the stock mid for regular driving.

Take into consideration this was a 1:30AM middle of working overtime before a couple of days off thought so im just throwing it out there

So... What do you think?
Appreciate 0
      05-24-2012, 06:33 AM   #2
Pig Farmer
Captain
8

 
Drives: 2009 BMW 135i
Join Date: May 2010
Location: Florida


Posts: 734
iTrader: (0)

My thoughts...

1) I've been in your shoes having similar thoughts while working late into the night/morning

2) That exhaust would be loud as shit but probably not get you much in terms of additional HP

3) You'll come to your senses once you have a chance to rest

4) I would still love to see you do this... just to hear the noise
Appreciate 0
      05-24-2012, 07:34 AM   #3
firechicken99
Major
11

 
Drives: Black '07 335i
Join Date: Mar 2011
Location: United States


Posts: 1,032
iTrader: (0)

Quote:
Originally Posted by Pig Farmer View Post
My thoughts...

1) I've been in your shoes having similar thoughts while working late into the night/morning

2) That exhaust would be loud as shit but probably not get you much in terms of additional HP

3) You'll come to your senses once you have a chance to rest

4) I would still love to see you do this... just to hear the noise
There was a crazy stripped/race prepped e46 at the HPDE last weekend (instructor) with a single exhaust setup out the back bumper and all I can say is lol

I already have a source for a good deal on a used 3" dynomax bullet, the bigger issue is getting an n55 mid and chopping the stock apart or an n54 mid and chopping that, all for the right price....
Appreciate 0
      05-24-2012, 08:30 AM   #4
bdaddylo
Major
United_States
17

 
bdaddylo's Avatar
 
Drives: 2011 E90 M3 ZCP
Join Date: Dec 2010
Location: Houston, TX


Posts: 1,126
iTrader: (2)

Garage List
The N55 mid is a relatively cheap mod especially if you do the install. Member FranklinJoseph had a dump pipe fabricated and it sounded quite good. In regards to it being too loud, I don't think it was any louder than the Akra and Meister.
__________________
_______________________
2011 E90 M3 ZCP/AW/Ohlins R&T
Appreciate 0
      05-24-2012, 09:33 AM   #5
firechicken99
Major
11

 
Drives: Black '07 335i
Join Date: Mar 2011
Location: United States


Posts: 1,032
iTrader: (0)

Quote:
Originally Posted by bdaddylo View Post
The N55 mid is a relatively cheap mod especially if you do the install. Member FranklinJoseph had a dump pipe fabricated and it sounded quite good. In regards to it being too loud, I don't think it was any louder than the Akra and Meister.
Does he have a thread about it anywhere?
Appreciate 0
      05-24-2012, 09:47 AM   #6
-Z-
Second Lieutenant
2

 
Drives: Black Pyrat
Join Date: Sep 2011
Location: Constitution State


Posts: 268
iTrader: (0)

whatever you do, don't chop you stock mid-pipe, it would be like burning $$$, get a new N55 mid and do whatever to it.

my 2c.
Appreciate 0
      05-24-2012, 11:03 AM   #7
Franklin Joseph
Captain
11

 
Drives: X5 - MCS - M3
Join Date: Aug 2007
Location: Houston, TX


Posts: 758
iTrader: (1)

Quote:
Originally Posted by firechicken99 View Post
Does he have a thread about it anywhere?
dont have a thread anywhere....but "minicorsa" bought my exhaust setup.

It was a berk prototype exhaust...they cut the exhaust right before the rear muffler section (there is about 12" of straight pipes) and welded a 3" vband.

I then got a local shop to weld a 3" turn down pipe (with vband).

So whenever i wanted to run a dump pipe, i'd just undo the rear muffler portion and bolt in the turn down pipe.
Appreciate 0
      05-24-2012, 09:43 PM   #8
Nugget
Major
18

 
Nugget's Avatar
 
Drives: 2011 135i
Join Date: Jan 2012
Location: Perth


Posts: 1,471
iTrader: (2)

Garage List
2011 BMW 135i  [5.00]
What about an electric exhaust cut out?
So it run through the whole system on the street but hit a switch and it comes straight out the dump pipe.
I've seen it done on Supras etc. Anyone done it on a BMW?
Appreciate 0
      05-25-2012, 05:03 AM   #9
Zuzu
Major General
Australia
93

 
Zuzu's Avatar
 
Drives: VO 1M Beast
Join Date: Mar 2008
Location: SyDnEy Oz


Posts: 7,581
iTrader: (0)

Quote:
Originally Posted by firechicken99 View Post
So after my HPDE I was thinking about how much I would love to get an exhaust on my 1'er even at least for just track days. The glorious $2500+ systems out there which I would love to purchase frankly aren't in my budget at the moment. I was considering getting an N55 midpipe and having it setup with the two pipes collecting into a 3" bullet and dumping under the car or out the side. Would provide some better flow (and noise ) for race days and I could easily swap back in the stock mid for regular driving.

Take into consideration this was a 1:30AM middle of working overtime before a couple of days off thought so im just throwing it out there

So... What do you think?
Was at a track day in Sydney, where a 135i vert had that set up..

Catless DP's, with catless mids, running a 3" straight pipe with no muffler..

Sounded awesome for the track, but dont know if you could live with it as a DD..
__________________
ZUZETTE Build..http://www.1addicts.com/forums/showthread.php?t=606023
COBB tune . ETS FMIC . aFe CAI . Remus Race exhaust . SSK . Custom Midpipes . CDV . BM OCC . H&R springs :
Appreciate 0
      05-25-2012, 09:56 AM   #10
flzrider
Captain
9

 
Drives: AW 1M
Join Date: Oct 2005
Location: Miami, FL


Posts: 663
iTrader: (1)

Quote:
Originally Posted by Nugget View Post
What about an electric exhaust cut out?
So it run through the whole system on the street but hit a switch and it comes straight out the dump pipe.
I've seen it done on Supras etc. Anyone done it on a BMW?
I'd be interested in something like this. Mid-pipes are cheap enough that you can comfortably hack one up without much concern.
__________________
Appreciate 0
      05-25-2012, 09:57 AM   #11
flzrider
Captain
9

 
Drives: AW 1M
Join Date: Oct 2005
Location: Miami, FL


Posts: 663
iTrader: (1)

Quote:
Originally Posted by Franklin Joseph View Post
dont have a thread anywhere....but "minicorsa" bought my exhaust setup.

It was a berk prototype exhaust...they cut the exhaust right before the rear muffler section (there is about 12" of straight pipes) and welded a 3" vband.

I then got a local shop to weld a 3" turn down pipe (with vband).

So whenever i wanted to run a dump pipe, i'd just undo the rear muffler portion and bolt in the turn down pipe.
Have any vids of the sound?
__________________
Appreciate 0
      05-25-2012, 11:50 AM   #12
Franklin Joseph
Captain
11

 
Drives: X5 - MCS - M3
Join Date: Aug 2007
Location: Houston, TX


Posts: 758
iTrader: (1)

Quote:
Originally Posted by flzrider View Post
Have any vids of the sound?
dont have any clips. i had catless dp and berk midpipe. It was relatively tame at low rpms...but scream at WOT (with a higher pitch)
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 11:09 AM.




1addicts
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST