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
      08-27-2012, 12:18 PM   #23
mexicobmw
First Lieutenant
Mexico
6
Rep
301
Posts

Drives: car
Join Date: Sep 2008
Location: mexico city

iTrader: (0)

smellyborrelli how does the rpi compare to the diablos. drone 1-2.5k sound, etc??
regards
diego
Appreciate 0
      08-27-2012, 02:17 PM   #24
smellyborrelli
Lieutenant
11
Rep
529
Posts

Drives: 2008 135i
Join Date: Sep 2011
Location: south jersey

iTrader: (3)

its hard to compare , the RPis are a helluva lot louder. but in a very good way. The Diablos are perfect if you just want a little rumble on top of the stock sound. Both have some low RPM drone. It doesn't bother me though, I think some people on here are just sensitive haha.
Appreciate 0
      08-27-2012, 04:07 PM   #25
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)

update.....

obviously had some drone with the rpi's. here is something you guys may want to try since it worked for me. go buy roxul acoutic batts and line your trunk with 1" of batting. i removed all my carpeting and plastic panels and put acoutic batt under everything. replaced all the panels and carpet (was much harder putting them back since it was tight with the batting) and the drone from 1-2nd is almost gone. only drone now is in high gears under load at low rpm. i say this reduced drone by 30%

im also putting in a trunk mat to flatten out the carpet closest to the seats since its a bit soft now which should also contribute some sound insulation as well. went for a drive and its noticably quiter in the cabin.
__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
Appreciate 0
      08-27-2012, 04:14 PM   #26
mexicobmw
First Lieutenant
Mexico
6
Rep
301
Posts

Drives: car
Join Date: Sep 2008
Location: mexico city

iTrader: (0)

thanks for the advise dubseed, I was planing on dynamat any pros-cpns vs the accoustic batts.
regards
diego
Appreciate 0
      08-27-2012, 04:15 PM   #27
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)

dynomat wont take away drone. it will only prevent any panels from vibrating. the roxul will kill the sound.
__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
Appreciate 0
      08-27-2012, 04:31 PM   #28
inTgr8r
Major General
inTgr8r's Avatar
Canada
132
Rep
8,469
Posts

Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

check out B-Quiet for various sound deadening/absorbing products.
http://www.b-quiet.com/vcomp.html

"Vcomp is a noise barrier composite consisting of a dense 1/8" vinyl based polymer barrier with a 1/4" thick foam decoupler. It has a total thickness of 3/8", weighs approximately 1 lb/sq. ft. "



I've used their dampeners before, they're great quality.
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R fr ARB•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•

Last edited by inTgr8r; 08-27-2012 at 08:10 PM.
Appreciate 0
      08-27-2012, 06:20 PM   #29
mexicobmw
First Lieutenant
Mexico
6
Rep
301
Posts

Drives: car
Join Date: Sep 2008
Location: mexico city

iTrader: (0)

dubseed could you please direct me to which roxul to buy to try and source it in mexico.
regards
diego
Appreciate 0
      08-27-2012, 08:08 PM   #30
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)

roxul safe and sound, roxul noise and fire, or just regualr roxul R16-22. they are all pretty much the same thing

Properties:
Non-combustible stone wool insulation with melting point of approx. 1177°C (2150°F)
Easily cut
Excellent sound absorbency
Fire resistant due to its high melting temperature
Water and moisture resistant; does not absorb moisture to maintain insulating value
Chemically inert
Does not rot, promote mildew, fungi, or bacteria, or sustain vermin
CFC- and HCFC- free product and process
Made from Natural and Recycled materials
__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
Appreciate 0
      08-27-2012, 09:18 PM   #31
seank
enthusiast
seank's Avatar
26
Rep
1,622
Posts

Drives: e30 m3,e90 wagon,sprinter,z4m
Join Date: Dec 2011
Location: sacramento, ca

iTrader: (3)

http://origin.kaboodle.com/hi/img/c/...=1326586833000

You could buy some ear muffs that are good to 105 db? Nothing like installing exhausts that are too loud to hear, but good for everyone else around you to hear.
Appreciate 0
      08-27-2012, 10:11 PM   #32
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)

its not that loud. the mufflers sit directly under the cabin of the coupe, so you will hear resonance throughout. i personally think the stock exhaust is boring for this car. you obviously think otherwise. good thing they make more than one kind of exhaust to suit different wants. im sure the car in your avatar has a louder exhaust...
__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
Appreciate 0
      08-27-2012, 10:24 PM   #33
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)





__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting

Last edited by dubsesd; 08-28-2012 at 11:23 PM.
Appreciate 0
      08-27-2012, 10:37 PM   #34
seank
enthusiast
seank's Avatar
26
Rep
1,622
Posts

Drives: e30 m3,e90 wagon,sprinter,z4m
Join Date: Dec 2011
Location: sacramento, ca

iTrader: (3)

Quote:
Originally Posted by dubsesd View Post
its not that loud. the mufflers sit directly under the cabin of the coupe, so you will hear resonance throughout. i personally think the stock exhaust is boring for this car. you obviously think otherwise. good thing they make more than one kind of exhaust to suit different wants. im sure the car in your avatar has a louder exhaust...
Dubsesd. It was a joke. I don't have a stock exhaust either.
Appreciate 0
      08-27-2012, 10:51 PM   #35
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)

What kind of exhaust do you have mounted? I didn't catch the sarcasm in your post. Sorry
__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
Appreciate 0
      08-27-2012, 11:04 PM   #36
mgwatson48
Lieutenant
mgwatson48's Avatar
Canada
5
Rep
501
Posts

Drives: 2008 E86 M
Join Date: May 2011
Location: Canada

iTrader: (2)

thanks for the vids dubs. i want one now haha. If i get one, im finding a welder to change the tips asap though!
__________________
SOLD: 2008 M Coupe
Appreciate 0
      08-27-2012, 11:09 PM   #37
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)

At first I wasn't too sure about the tips myself. But I think they looks amazing in person when they are cleaned up and polished inside. I clean up my car weekly so that isn't a problem for me, especially since I don't drive in rain. My original plan was to buy another large tip from rpi and make them the same size, but I'm now leaning towards the current look
__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
Appreciate 0
      08-27-2012, 11:49 PM   #38
mgwatson48
Lieutenant
mgwatson48's Avatar
Canada
5
Rep
501
Posts

Drives: 2008 E86 M
Join Date: May 2011
Location: Canada

iTrader: (2)

Would it be easy enough to weld on another larger RPi tip? Is the enough room for it without modification?
__________________
SOLD: 2008 M Coupe
Appreciate 0
      08-28-2012, 07:57 AM   #39
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)

There is room. But you would need adjustable dkf hangers. It would be a little tricky separating and welding the tips together again without damaging the finish though.
__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
Appreciate 0
      08-28-2012, 10:24 AM   #40
ongnoi
boon
ongnoi's Avatar
United_States
0
Rep
99
Posts

Drives: Z4MC - 128i - EVO X
Join Date: Apr 2009
Location: Twin Cities, MN

iTrader: (0)

Are there tunnels where you live? That was my fix for the drone issue for this exhaust. One time late at night, the second I punched the throttle as the car entered the tunnel in 3rd gear, brake lights around me lit up instantaneously...
__________________
Appreciate 0
      08-28-2012, 12:29 PM   #41
smellyborrelli
Lieutenant
11
Rep
529
Posts

Drives: 2008 135i
Join Date: Sep 2011
Location: south jersey

iTrader: (3)

hey Dub, how are your black badges holding up
? i cant make mine last more than 2 months without fading.. even with 3 heavy coats of clear. My car is my daily though.
Appreciate 0
      08-28-2012, 01:11 PM   #42
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)

Mine are like new. But it's a weekend car and doesn't see rain. Mine are black chrome though
__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
Appreciate 0
      08-28-2012, 03:46 PM   #43
Finnegan
Major General
Finnegan's Avatar
United_States
96
Rep
6,785
Posts

Drives: Sapphire Black/Black Z4Mc
Join Date: Oct 2008
Location: At the track..or wishing I were at the track

iTrader: (21)

Good info here on reducing resonance. That is the issue, especially with the coupe, since the hatch area just acts like one big speaker/subwoofer enclosure. I suspect the hatch itself also contributes to resonance--a lot. Has anyone tried removing the trim and stuffing some of these deadening materials in there?
Appreciate 0
      08-28-2012, 04:19 PM   #44
dubsesd
Colonel
dubsesd's Avatar
66
Rep
2,890
Posts

Drives: Z4M coupe / X5 35d LCI /F150
Join Date: Jul 2011
Location: Ottawa

iTrader: (1)

i just used the roxul stuff in behind the panels and it made a noticible difference
__________________
2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" HRE FF01 Tarmac/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/carbon sideskirt extentions/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
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 -4. The time now is 04:16 AM.




zpost
zpost
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, 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