E90Post
 


Extreme Powerhouse
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > (NEED ADVICE) New Exhaust set-up UPDATED



Reply
 
Thread Tools Search this Thread
      08-24-2014, 12:51 PM   #23
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
Quote:
Originally Posted by TheAxiom View Post
You're just better off buying AFE headers or Euro headers. The stock manifolds are crap, the primaries are too short, the merge is terrible, etc etc. Essentially anything is better than those boat anchors.
True but some guy did it with stock manifolds and I saw pretty good gains, I wouldn't spend over $1000 for something that doesn't give too much power. Gotta balance the money-to-gains ratio lol
Appreciate 0
      08-25-2014, 10:33 PM   #24
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
UPDATED.
Appreciate 0
      08-27-2014, 02:31 PM   #25
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
Should I replace the current glasspack with the stock resonator?
Appreciate 0
      08-27-2014, 02:34 PM   #26
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
Would the stock resonator work better than the current glasspack for more backpressure?
Appreciate 0
      08-27-2014, 06:50 PM   #27
Taskmaster
Banned
Japan
2465
Rep
9,004
Posts

Drives: M235i 6MT / E92 328 Msport 6MT
Join Date: Nov 2013
Location: Florida

iTrader: (6)

Back pressure is bad, period. Single 3 inch back with an inline resonator and a good muffler. You should be fine.
Appreciate 0
      08-27-2014, 07:11 PM   #28
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
I think I decided on an Vibrant Ultra Quiet Resonator, I may or may not remove the glasspack.

Quote:
Originally Posted by TheAxiom View Post
Back pressure is bad, period. Single 3 inch back with an inline resonator and a good muffler. You should be fine.
You need it for low end torque on NA cars
Appreciate 0
      08-27-2014, 07:30 PM   #29
b-man
Major
b-man's Avatar
United_States
604
Rep
1,090
Posts

Drives: 328xi
Join Date: Jan 2013
Location: maine

iTrader: (2)

lol. Can you please explain why you need back pressure
Appreciate 0
      08-27-2014, 08:30 PM   #30
Route 16
I got lei'd
Route 16's Avatar
Philippines
844
Rep
7,593
Posts

Drives: '10 E90 M3
Join Date: Sep 2011
Location: Dark Side of the Moon

iTrader: (62)

Quote:
Originally Posted by hot330i View Post
if you don't like it too loud, then I suggest putting back the OEM muffler
this is what I have before, super sprint headers and mid pipes, resonator delete into PE exhaust, like you said it is way too raspy and loud; putting back the OEM muffler reduced the sound 10X, you will hear just a little hum
sell your SS headers
Appreciate 0
      08-27-2014, 09:48 PM   #31
Taskmaster
Banned
Japan
2465
Rep
9,004
Posts

Drives: M235i 6MT / E92 328 Msport 6MT
Join Date: Nov 2013
Location: Florida

iTrader: (6)

Quote:
Originally Posted by b-man View Post
lol. Can you please explain why you need back pressure
I don't know how many different ways I can politely say he doesn't know wtf he's talking about.
Appreciate 0
      08-27-2014, 09:53 PM   #32
b-man
Major
b-man's Avatar
United_States
604
Rep
1,090
Posts

Drives: 328xi
Join Date: Jan 2013
Location: maine

iTrader: (2)

Quote:
Originally Posted by TheAxiom View Post
I don't know how many different ways I can politely say he doesn't know wtf he's talking about.
I tend to agree but I'd like to know why he said that. Cause I don't agree with him.
Appreciate 0
      08-28-2014, 01:02 AM   #33
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
Quote:
Originally Posted by TheAxiom View Post
I don't know how many different ways I can politely say he doesn't know wtf he's talking about.
I do see your responses but you don't know what you're talking about so I don't bother replying.


Backpressure is bad and I do have my terms wrong. When you're pipes are too small, there's too much backpressure and you lose power. When they're too large, you lose VELOCITY, which if you don't have enough of you lose power. Having a 3inch pipe is probably too large for our NA engines. Sure for high end its great but wtf about low end? You're torqueless for days low end and you're not going anywhere in a high gear at 2000rpm. If you had a drag car, sure go for it but this is my daily. I need a compromise. Having JUST enough backpressure helps pick up low end. Adding these things doesn't necessarily help make your tq or hp peak higher or lower but it shifts the peak around. In my case I don't want my torque too high which sacrifices my low end.

Appreciate 0
      08-28-2014, 01:04 AM   #34
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
Anyways I already decided, I got a Vibrant Ultra Quiet resonator. I may replace the current glasspack I have with it or just add it somewhere along the piping.
Appreciate 0
      08-28-2014, 08:13 AM   #35
Taskmaster
Banned
Japan
2465
Rep
9,004
Posts

Drives: M235i 6MT / E92 328 Msport 6MT
Join Date: Nov 2013
Location: Florida

iTrader: (6)

Quote:
Originally Posted by Amini77 View Post
I do see your responses but you don't know what you're talking about so I don't bother replying.


Backpressure is bad and I do have my terms wrong. When you're pipes are too small, there's too much backpressure and you lose power. When they're too large, you lose VELOCITY, which if you don't have enough of you lose power. Having a 3inch pipe is probably too large for our NA engines. Sure for high end its great but wtf about low end? You're torqueless for days low end and you're not going anywhere in a high gear at 2000rpm. If you had a drag car, sure go for it but this is my daily. I need a compromise. Having JUST enough backpressure helps pick up low end. Adding these things doesn't necessarily help make your tq or hp peak higher or lower but it shifts the peak around. In my case I don't want my torque too high which sacrifices my low end.

Who told you that? Are you just making things up now?
Appreciate 0
      08-28-2014, 10:28 AM   #36
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
Quote:
Originally Posted by TheAxiom View Post
Who told you that? Are you just making things up now?
Who told you that 3 inch is good? For turbod cars it's good not for NA. You are honestly clueless. Slap yourself.
Appreciate 0
      08-28-2014, 11:04 AM   #37
Taskmaster
Banned
Japan
2465
Rep
9,004
Posts

Drives: M235i 6MT / E92 328 Msport 6MT
Join Date: Nov 2013
Location: Florida

iTrader: (6)

Quote:
Originally Posted by Amini77 View Post
Who told you that 3 inch is good? For turbod cars it's good not for NA. You are honestly clueless. Slap yourself.

So you admit you don't know what you're talking about? I'm ok with that.

I think you're making a stupid move, and if you're happy with it, so am I. But you do know sections of the stock exhaust are 3 inches in diameter, right? And that all N series race cars use a single 3 inch exhaust as well.

But you're right, We are ALL clueless. Have fun with adding back pressure on the small exhaust of yours.
Appreciate 0
      08-28-2014, 12:00 PM   #38
b-man
Major
b-man's Avatar
United_States
604
Rep
1,090
Posts

Drives: 328xi
Join Date: Jan 2013
Location: maine

iTrader: (2)

Quote:
Originally Posted by Amini77 View Post
Anyways I already decided, I got a Vibrant Ultra Quiet resonator. I may replace the current glasspack I have with it or just add it somewhere along the piping.
I think 3" is too much unless you're over 325hp. I'd go with 2.75

Good luck with whatever you decide! Let us know how it comes out
Appreciate 0
      08-28-2014, 02:26 PM   #39
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
Quote:
Originally Posted by TheAxiom View Post
So you admit you don't know what you're talking about? I'm ok with that.

I think you're making a stupid move, and if you're happy with it, so am I. But you do know sections of the stock exhaust are 3 inches in diameter, right? And that all N series race cars use a single 3 inch exhaust as well.

But you're right, We are ALL clueless. Have fun with adding back pressure on the small exhaust of yours.
I never admitted I don't know what I'm talking about. It seems like you're so full of yourself you're just making shit up. Do you have a link to share? Do you have supported facts? Dynos? Anything? So far you've been talking out of your ass. I never said ALL of you, I said you specifically don't know what you're talking about.

You say a race car...okay am I a race car? I need a compromise for like the 3rd time I've said. I'm not going to be in a higher rev range while I'm driving like a race car, I need some power in the lower section of my power band. I'm not sure about you...you seem like a dimwit kinda guy so that's what you probably do

Last edited by Amini77; 08-28-2014 at 02:31 PM..
Appreciate 0
      08-28-2014, 02:31 PM   #40
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
Quote:
Originally Posted by b-man View Post
I think 3" is too much unless you're over 325hp. I'd go with 2.75

Good luck with whatever you decide! Let us know how it comes out
You're right, that's why I didn't go with 3". I went with 2.5" which is still an upgrade from stock, I'll still make power, but I didn't take too big of a risk going larger and I'm completely okay with that. I sure will, today I'm putting a resonator on, I think its still wayyyy too raspy for my taste.
Appreciate 0
      08-28-2014, 05:16 PM   #41
Taskmaster
Banned
Japan
2465
Rep
9,004
Posts

Drives: M235i 6MT / E92 328 Msport 6MT
Join Date: Nov 2013
Location: Florida

iTrader: (6)

Because the area of the pipes is JUST under the surface area of a 3" pipe, with the exclusion of the section after the merge (resonator) is 3"

But tell me more about how you don't know how to measure, or the dynos YOU have found showing a loss of power with a single exhaust.
Appreciate 0
      08-28-2014, 09:43 PM   #42
MarkkyyMan
Captain
MarkkyyMan's Avatar
United_States
38
Rep
701
Posts

Drives: 2010 BMW 128i
Join Date: Dec 2009
Location: Indiana, U.S.

iTrader: (0)

Performance Exhaust - More Horsepower:
Appreciate 0
      08-28-2014, 10:31 PM   #43
Taskmaster
Banned
Japan
2465
Rep
9,004
Posts

Drives: M235i 6MT / E92 328 Msport 6MT
Join Date: Nov 2013
Location: Florida

iTrader: (6)

AA 3inch race exhaust on a E36 M3. SO MUCH LOW END POWER LOSS.
Attached Images
 
Appreciate 0
      08-29-2014, 03:32 AM   #44
Amini77
Brigadier General
United_States
186
Rep
4,732
Posts

Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

iTrader: (1)

Garage List
2013 BMW 550i  [0.00]
Quote:
Originally Posted by TheAxiom View Post
AA 3inch race exhaust on a E36 M3. SO MUCH LOW END POWER LOSS.
Showing me a dyno won't prove your point. Show me the link, I want to see his mods.
Appreciate 0
Reply

Bookmarks


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



All times are GMT -5. The time now is 10:49 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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