ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   ZPOST > BMW Z4 Technical Talk > Engine, Exhaust, Drivetrain Modifications
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
Post Reply
 
Thread Tools Search this Thread
      06-22-2013, 07:40 PM   #1
intoflatlines
Lieutenant
intoflatlines's Avatar
United_States
67
Rep
501
Posts

Drives: Z4MR, E34, E30
Join Date: Mar 2013
Location: Chicago

iTrader: (0)

DKF hangers - looking for first hand experience with drone/vibration reduction

My exhaust has an intense drone around 2-3K RPM. I'm not sure if it's from simply volume or if it is so loud in the cabin due to vibration being transferred by contact into the body somehow.

Does anyone have first hand experience with DKF exhaust hangers and aftermarket/loud exhaust/drone? Were there any noticeable affects on interior drone or audible vibration?
Appreciate 0
      06-22-2013, 07:43 PM   #2
Finnegan
Dog Listener
Finnegan's Avatar
United_States
701
Rep
7,850
Posts

Drives: Z4M/. Z3M, E36/46 M3
Join Date: Oct 2008
Location: Teaching the dog to slalom

iTrader: (22)

Had Diablos. Small reduction in drone, but not a major reduction. Great and well made product and über adjustable.
Appreciate 0
      06-23-2013, 03:32 PM   #3
gferil
Captain
gferil's Avatar
30
Rep
740
Posts

Drives: 06 Z4MC
Join Date: Dec 2010
Location: San Francisco, CA

iTrader: (6)

Reduction in drone is very minimal, almost not noticeable. Reduction in vibration is there if you torque everything right, but again, nothing earth shattering. Biggest positive for these are the adujustability for sure.
Appreciate 0
      06-23-2013, 04:07 PM   #4
Nate4641
Major
Nate4641's Avatar
United_States
150
Rep
1,134
Posts

Drives: '07 M Roadster
Join Date: Dec 2011
Location: Warner Robins, GA

iTrader: (0)

Garage List
I agree with gferil completely. Especially in a roadster you aren't going to have much luck getting rid of the drone. I just put these on my M roadster and they did help a little with vibration, but not drone. I'm also using RPI mufflers so they're pretty damn loud to begin with.
__________________
Appreciate 0
      11-26-2014, 07:03 PM   #5
ANILE8
Captain
ANILE8's Avatar
No_Country
179
Rep
698
Posts

Drives: Z4 M Coupé - Carbon Black
Join Date: Mar 2008
Location: The Dark Web

iTrader: (0)

Strange comments here.

TNZ4MC swears by them that they cut 95% of the drone.

http://www.zpost.com/forums/showthread.php?t=884579

What is the real deal on them. Do they work for eliminating drone or not?

Very confused.

I love the sound of my Diablo's but the drone when in low rpm 2-3K is distracting.

All aftermarket exhausts have some drone from what I have read so there must be a fix or some mods to reduce it that works.
__________________
Nitron NTR R3 | StopTech Trophy Sport STR-60 380x32mm / StopTech Trophy Sport STR-40 355x32mm | Bridgestone RE-71RS | ADV.1 | CDV Delete | TMS Rear Camber Arms | RE Diablo's | 4.10 Gears | Euro Headers | RTD REVO1 Short Shifter
Appreciate 0
      11-26-2014, 10:45 PM   #6
inTgr8r
Lieutenant General
inTgr8r's Avatar
Canada
2422
Rep
11,665
Posts

Drives: M2 Comp
Join Date: Mar 2006
Location: Toronto

iTrader: (10)

Quote:
Originally Posted by ANILE8 View Post
.............


What is the real deal on them. Do they work for eliminating drone or not?


All aftermarket exhausts have some drone from what I have read so there must be a fix or some mods to reduce it that works.
DKF hangars are not designed to stop drone.
Some induced vibration; yes.
Adjustability; absolutely.

You can't cure drone by isolating the system, it has to be tuned out.
Google exhaust drone, for tons of info.
__________________
'21 M2C Hockenheim Silver
'18 718 Cayman S Lava Orange (sold)
'13 E92 M3 Santorini Blue (sold)
'07 Z4 M Coupe Alpine White (sold)
Appreciate 0
      11-29-2014, 07:26 AM   #7
Beedub
Major General
United Kingdom
423
Rep
5,327
Posts

Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

they are good very good, the only thing that concerns me is how stressed the isolators appear to be even when Tq'd very lightly.
__________________
Z4MR VT2 - Clubsport build.
Multi award winning Detailing | Wrap | PPF specialists UK based - www.topwrapz.com
Appreciate 0
      11-29-2014, 09:48 AM   #8
sabbanick
Lieutenant
13
Rep
505
Posts

Drives: 08 SBM M coupe
Join Date: Sep 2010
Location: NY

iTrader: (1)

i have a new unused set if anyone is interested PM me.
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



All times are GMT -5. The time now is 01:16 PM.




zpost
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