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
      02-04-2013, 04:32 PM   #23
Drace1
Private First Class
Drace1's Avatar
6
Rep
197
Posts

 
Drives: 2011 AW 1M
Join Date: Oct 2007
Location: LOS ANGELES

iTrader: (0)

Quote:
Originally Posted by SpeedballTrix View Post
is awesome.

/thread

Im with Speedball, most people look for this sound! Sit back relax and enjoy letting off the throttle and hearing that backfire noise.

I'm actually looking forward to having some more backfire in the future. Kind of jealous of EinserM's sound, I got the craziest sound clip from it yesterday and haven't stopped watching/listening to it.
Appreciate 0
      02-04-2013, 05:11 PM   #24
Freon
Captain
United_States
16
Rep
911
Posts

 
Drives: 2009 135i
Join Date: Nov 2007
Location: Indianapolis

iTrader: (2)

I tend to think this is caused not necessarily "lean" or "rich" but both in quick succession due to lag in sensors. Your MAP or MAF sensor isn't instantaneous, so when you suddenly go from 100% to 0% throttle there can be spikes. I would tend to think you're rich at high throttle, and a sudden throttle reduction to 0% can cause the injectors to turn off, pump some of the leftover air in the intake manifold (pure air, ~21% oxygen) into the exhaust where there is still some rich mixture, and the super hot turbine wheel or other hotspot in the exhaust will trigger combustion.

I wouldn't sweat it. Your car always did this, you just didn't really notice due to the factory catalysts, mufflers, and resonators.
__________________
2009 BMW 135i 6MT Sport, AFE intake, Cobb AP, Apex 18x8.5+9.5, 255/275 PSS
Appreciate 0
      02-05-2013, 12:48 AM   #25
NickyC
Captain
17
Rep
707
Posts

 
Drives: Something German.
Join Date: Nov 2010
Location: Somewhere I don't want to be

iTrader: (6)

Popping/gurgling on my car is pretty wild under deceleration. I have a straight through exhaust, Cobb Stage 2+ car and I adore the sound. I've had quite a few excited teenagers or whatever pull up to me after a spirited launch and tell me the car spit pretty nice flames out the back. I've never seen it in person however, so I'll have to take their word for it.
Appreciate 0
      02-05-2013, 01:56 AM   #26
SteveAZ
Captain
8
Rep
621
Posts

 
Drives: 135i Cab
Join Date: Jul 2012
Location: Phoenix, AZ

iTrader: (5)

Negative....you do not go rich during shifts....

__________________
2008 AW E88 Auto running on 100% E85
Current--AA FMIC--BMS CP, DCIs, & OCC--ER OC--Fuel-It! Stage 2 LPFP--RB PCV--M3 FSB, RCAs, & FCAs--Whiteline RSFBs, and DBs--Rogue TA's--ER SS brakelines--Stoptech slotted rotors w/Ferodo pads--Apex Arc 8s w/Nitto NT05's--Wavetrac LSD & Ohlins R & T Waiting on install: Nothing...give it a few
Appreciate 0
      02-05-2013, 04:24 AM   #27
Cozy
Major
Cozy's Avatar
United Kingdom
25
Rep
1,491
Posts

 
Drives: E82 135i
Join Date: Mar 2011
Location: Surrey, England

iTrader: (0)

Rip out the mid-cats, resonator and install a new axle-back and the gurgling and pops get pretty insane. I out-gurgled a McLaren 12C on the weekend but sadly in all other departments he would have destroyed me .

NickyC, I cannot imagine how wild your car sounds
Appreciate 0
      02-10-2013, 05:31 AM   #28
pkimM3r
Banned
pkimM3r's Avatar
96
Rep
7,321
Posts

 
Drives: m3 saloon in granny mode.
Join Date: Dec 2009
Location: lost angeles

iTrader: (0)

This is an old post but gurgling is nothing. And my stock n55 had a huge backfire tonight going hard up "the snake". When i got to the area where ppl park and hang out, they were going shits and giggles nuts over it. I was surprised and thought i hit a branch on the undercarriage at first but apparently it echoed all the way up to the spectators. Nice.
Appreciate 0
      04-07-2013, 09:05 PM   #29
jose325i
New Member
0
Rep
16
Posts

 
Drives: 2008 135i
Join Date: Sep 2011
Location: Houston

iTrader: (0)

Once, I accelerated WOT and shifted from 1-2 in Manual mode (step tranny) around 3-3.5k...Heard a LOUD "bang" from the exhaust, and got a service engine soon light.

I think the car turned off 2-3 cylinders afterwards. When I tried to accelerate, the RPM gauge would just wobble up and down, almost no power. After driving relaxed for a minute, the light went away and the car went back to normal. Anyone had this happen? I'm 100% stock...
__________________
Appreciate 0
      04-19-2013, 06:39 PM   #30
335chi
New Member
0
Rep
5
Posts

 
Drives: 2009 335xi
Join Date: Apr 2013
Location: Chicago

iTrader: (0)

Quote:
Originally Posted by jose325i View Post
Once, I accelerated WOT and shifted from 1-2 in Manual mode (step tranny) around 3-3.5k...Heard a LOUD "bang" from the exhaust, and got a service engine soon light.

I think the car turned off 2-3 cylinders afterwards. When I tried to accelerate, the RPM gauge would just wobble up and down, almost no power. After driving relaxed for a minute, the light went away and the car went back to normal. Anyone had this happen? I'm 100% stock...
Sounds like misfire which is common N54 code - do you have access to an OBD scanner to check for stored codes?
Appreciate 0
      04-19-2013, 06:48 PM   #31
themellly
Alice in Wonderland
United_States
2
Rep
109
Posts

 
Drives: 2012 135i e88
Join Date: Apr 2013
Location: Glendale,CA

iTrader: (0)

Garage List
Quote:
Originally Posted by RealityDesign View Post

To get REAL backfire (flames out the exhaust tips), you'd need to be completely catless.

Very true. Such a huge difference. If I get it in the right moment sometimes its like gunshots. If your loving the sound now, remove all the cats and then you'll be really excited!
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 05:25 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