Welcome to the North American Subaru Impreza Owners Club Sunday July 13, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC General > General Community

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 04-09-2013, 01:22 AM   #1
Alistairh
Scooby Newbie
 
Member#: 268286
Join Date: Dec 2010
Chapter/Region: W. Canada
Location: Edmonton
Vehicle:
2011 STi
Dark Grey

Default Heavily modded STi is too loud.

I've got a heavily modded 2011 STi, 3" Catless downpipe, Invidia Q300 catback, Invidia equal length headers

I don't mind a bit of noise, but this thing is like, full on race car loud, and I'm sick of it. It being so loud is one of the reasons I don't drive it much anymore.

I was looking at a maddad whisper exhaust. It has the quad tips which I like, and getting a cat welded into my DP at the end.

About cat placement, I think closer to the turbo is better for cat efficiency but I'm mostly concerned with it killing noise. Will there still be enough heat in the exhaust at that point for the cat to do something and not die in a few thousand kms?

My tune is quite nice, and not overly rich.
* Registered users of the site do not see these ads.
Alistairh is offline   Reply With Quote
Old 04-09-2013, 01:47 AM   #2
sc00by4life
Scooby Guru
 
Member#: 97135
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Bothell
Default

lol. exhaust doesn't equate "heavily modified".

You could swap back to a stock catback, which would greatly help reduce noise.

if you want a cat in the downpipe, buy a catted downpipe.
sc00by4life is offline   Reply With Quote
Old 04-09-2013, 01:55 AM   #3
p951951951t
Scooby Newbie
 
Member#: 276541
Join Date: Mar 2011
Chapter/Region: South East
Location: North Georgia
Vehicle:
1972 Alfa Romeo GTV
Alfa Rosso

Default

Find a quieter exhaust. Whisper is quiet, Blitz Nur-Spec R is quiet. I know those from personal experience. The ARK exhaust is also pretty good but seemed a bit louder.

With the right exhaust you won't need to weld in a cat. That wouldn't do much for the sound and it would be a waste of time and money, plus at that point you are adding additional restrictions into the system.
p951951951t is offline   Reply With Quote
Old 04-09-2013, 01:56 AM   #4
storm_trooperSTi
Scooby Newbie
 
Member#: 243358
Join Date: Apr 2010
Chapter/Region: TXIC
Location: San Marcos, TX.
Vehicle:
0405 02 STi STi WRX
Jbp, Aw, Srp

Default

Lol "heavily modified" I bet your car is quiet... You don't even have the loudest invidia exhaust haha! I guess you could find a more quiet exhaust, but if you ever wanna make real power, it will probably be loud.
storm_trooperSTi is offline   Reply With Quote
Old 04-09-2013, 01:57 AM   #5
blueninja85
Scooby Newbie
 
Member#: 324091
Join Date: Jun 2012
Default

Obviously when you start opening up the exhaust, it's going to get louder. On my srt-4 I used to run open downpipe. Some may classify that as loud, but not to me. It just sounded a lot like an 18 wheeler. But you can do several things. You can go back to stock exhaust, you can change your exhaust to something more quieter, or maybe you can try to add a larger resonator? One thing I liked about a cutout on my srt-4 was that I could be quiet when I want, although the SRT-4 stock was pretty loud on its own, and I can have it loud with the full gain of power from a tbe at the flip of a switch. However cutouts seem to easily short circuit, so it's a PITA if it short circuits when it's fully open and you want to close it.
blueninja85 is offline   Reply With Quote
Old 04-09-2013, 01:58 AM   #6
Horuku
Scooby Newbie
 
Member#: 309930
Join Date: Feb 2012
Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2013 STI Sedan
Plasma Blue Pearl

Default

The Q300 is pretty quiet. It isn't even close to the Invidia N1 level. If you really care about sound then throw the stock exhaust or SPT back on there. Catback won't affect your power levels with your "heavy" mods.
Horuku is offline   Reply With Quote
Old 04-09-2013, 02:21 AM   #7
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

im s00000ooooo happy i have a stromung exhaust on my car.....id buy it again in a heartbeat even if it cost double what i paid
Uncle Scotty is offline   Reply With Quote
Old 04-09-2013, 02:25 AM   #8
Fat Black Pig Sac
Scooby Specialist
 
Member#: 247911
Join Date: May 2010
Chapter/Region: BAIC
Location: Sacramento , CALI
Vehicle:
2005 obp WRX
color: HUMMER H2 WHITE

Default

let me get it straight... your car is not heavily modified if your only mod is an exhaust
Fat Black Pig Sac is offline   Reply With Quote
Old 04-09-2013, 02:32 AM   #9
Alistairh
Scooby Newbie
 
Member#: 268286
Join Date: Dec 2010
Chapter/Region: W. Canada
Location: Edmonton
Vehicle:
2011 STi
Dark Grey

Default

Quote:
Originally Posted by sc00by4life View Post
lol. exhaust doesn't equate "heavily modified".

You could swap back to a stock catback, which would greatly help reduce noise.

if you want a cat in the downpipe, buy a catted downpipe.
Okay, how about the full cosworth EJ257 longblock, ID1000cc injectors, KW Variant 3 coilovers, Aquamist HFS6 meth injection, Rotated GT30 and GT28 series turbo ( 442/470 and 343/420 respectively) and a bunch of other crap.

I've got a unknown/rocket rally brand up pipe with my rotated turbo, and an EWG, so 1) I'd need to plumb my ewg back into another downpipe at an added expense 2) I'm not sure if it will physically fit 3) my current turbo hotside is a 3" V-Band, not the 5 bolt.

Quote:
Originally Posted by storm_trooperSTi View Post
Lol "heavily modified" I bet your car is quiet... You don't even have the loudest invidia exhaust haha! I guess you could find a more quiet exhaust, but if you ever wanna make real power, it will probably be loud.
No, It isn't quiet. I have a number of other cars, all heavily modified, and I can have a conversation next to them at idle. I have a 813 AWHP r35 GT-R for when I want 'real power' STi only exists to drive around in the winter.

Quote:
Originally Posted by Horuku View Post
The Q300 is pretty quiet. It isn't even close to the Invidia N1 level. If you really care about sound then throw the stock exhaust or SPT back on there. Catback won't affect your power levels with your "heavy" mods.
Stock exhaust doesn't exist anymore.
Alistairh is offline   Reply With Quote
Old 04-09-2013, 02:41 AM   #10
storm_trooperSTi
Scooby Newbie
 
Member#: 243358
Join Date: Apr 2010
Chapter/Region: TXIC
Location: San Marcos, TX.
Vehicle:
0405 02 STi STi WRX
Jbp, Aw, Srp

Default

Maybe you should be more specific in your post then... The only mod you listed was exhaust. If you have a built motor/ rotated turbo setup, why are you wanting less noise/ why are you asking us while providing no information?
storm_trooperSTi is offline   Reply With Quote
Old 04-09-2013, 02:46 AM   #11
Alistairh
Scooby Newbie
 
Member#: 268286
Join Date: Dec 2010
Chapter/Region: W. Canada
Location: Edmonton
Vehicle:
2011 STi
Dark Grey

Default

Quote:
Originally Posted by storm_trooperSTi View Post
Maybe you should be more specific in your post then... The only mod you listed was exhaust. If you have a built motor/ rotated turbo setup, why are you wanting less noise/ why are you asking us while providing no information?
I want less noise because noise is annoying?

I provided the information of, I want to quiet my setup. I don't see how having a built motor makes any difference.

Heavily modified doesn't imply head/engine work, and a rotated turbo? Aren't those normal steps along the path to becoming heavily modified?
Alistairh is offline   Reply With Quote
Old 04-09-2013, 02:46 AM   #12
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default



honey....i built a race car and now i dont like driving it

and people dont like it when I laugh at them for doing dumb things????

well...anyway....more at 11:00, folks
Uncle Scotty is offline   Reply With Quote
Old 04-09-2013, 02:48 AM   #13
silvercookie
NASIOC Supporter
 
Member#: 180033
Join Date: May 2008
Chapter/Region: Tri-State
Location: Queens, NY, 11385
Vehicle:
2005 WRX
PSM

Default

Do a Recirculated exhaust. Plumb it back into your intake.
silvercookie is offline   Reply With Quote
Old 04-09-2013, 02:53 AM   #14
Alistairh
Scooby Newbie
 
Member#: 268286
Join Date: Dec 2010
Chapter/Region: W. Canada
Location: Edmonton
Vehicle:
2011 STi
Dark Grey

Default

Quote:
Originally Posted by Uncle Scotty View Post


honey....i built a race car and now i dont like driving it

and people dont like it when I laugh at them for doing dumb things????

well...anyway....more at 11:00, folks
http://forums.roadbikereview.com/att...2670970-15.jpg

Have anything useful to add? If not please leave my thread.
Alistairh is offline   Reply With Quote
Old 04-09-2013, 02:55 AM   #15
Alistairh
Scooby Newbie
 
Member#: 268286
Join Date: Dec 2010
Chapter/Region: W. Canada
Location: Edmonton
Vehicle:
2011 STi
Dark Grey

Default

Quote:
Originally Posted by silvercookie View Post
Do a Recirculated exhaust. Plumb it back into your intake.
Not a diesel.
Alistairh is offline   Reply With Quote
Old 04-09-2013, 02:59 AM   #16
p951951951t
Scooby Newbie
 
Member#: 276541
Join Date: Mar 2011
Chapter/Region: South East
Location: North Georgia
Vehicle:
1972 Alfa Romeo GTV
Alfa Rosso

Default

Here are links to the exhausts I recommend (apart from the whisper)

Blitz:

http://www.rallysportdirect.com/Blit...-2010-WRX-2011


ARK:
http://www.arkperformance.com/Produc...e=SM1301-0110G

I'm not sure the ARK is any more quiet than what you have but the tone inside the car isn't bad since it's properly resonated. The only problem with the Blitz is that it annoyingly steps down to smaller diameter at the downpipe and also it's way overpriced for the quality. The sound is louder than the whisper but not bad.

I have the blitz right now, but I bought it second hand for cheap and welded on a 3" flange. It's almost too quiet for me.
p951951951t is offline   Reply With Quote
Old 04-09-2013, 03:08 AM   #17
Alistairh
Scooby Newbie
 
Member#: 268286
Join Date: Dec 2010
Chapter/Region: W. Canada
Location: Edmonton
Vehicle:
2011 STi
Dark Grey

Default

Quote:
Originally Posted by p951951951t View Post
Here are links to the exhausts I recommend (apart from the whisper)

Blitz:

http://www.rallysportdirect.com/Blit...-2010-WRX-2011


ARK:
http://www.arkperformance.com/Produc...e=SM1301-0110G

I'm not sure the ARK is any more quiet than what you have but the tone inside the car isn't bad since it's properly resonated.
The Blitz is Hatchback only, and I'm a sedan

The ARK looks nice, as it's got those magical resonance tubes. However I remebered this thread

http://goo.gl/fbPPr

And that kinda worries me.
Alistairh is offline   Reply With Quote
Old 04-09-2013, 03:25 AM   #18
p951951951t
Scooby Newbie
 
Member#: 276541
Join Date: Mar 2011
Chapter/Region: South East
Location: North Georgia
Vehicle:
1972 Alfa Romeo GTV
Alfa Rosso

Default

That's interesting. I've never had one on my personal vehicle but the one I heard sounded great and the owner didn't mention any issues.
p951951951t is offline   Reply With Quote
Old 04-09-2013, 06:26 AM   #19
HinshawWRX
Medium Frank
Moderator
 
Member#: 140114
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Common Sense, VA
Vehicle:
2014 Porsche
GT3 (Currently on Fire)

Default

So this is a fancy "help me pick my exhaust because I cannot goto a local meet, search youtube" thread? Weird.

Stock exhaust doesn't exist anymore? By one. Add resonators. Plumb the EWG dump tube into the exhaust. Buy a tiny muffler for the dump tube. Seriously it's all been done and discussed before.
HinshawWRX is offline   Reply With Quote
Old 04-09-2013, 06:34 AM   #20
i_c_the_light
Scooby Guru
 
Member#: 88618
Join Date: Jun 2005
Chapter/Region: SCIC
Location: New Zealand
Vehicle:
1994 Legacy
"The Silver Slug"

Default

This is nothing more than a whinge thread.
i_c_the_light is online now   Reply With Quote
Old 04-09-2013, 06:39 AM   #21
i_c_the_light
Scooby Guru
 
Member#: 88618
Join Date: Jun 2005
Chapter/Region: SCIC
Location: New Zealand
Vehicle:
1994 Legacy
"The Silver Slug"

Default

Quote:
Originally Posted by Uncle Scotty


honey....i built a race car and now i dont like driving it

and people dont like it when I laugh at them for doing dumb things????

well...anyway....more at 11:00, folks
Isn't this the circle of life? Not even a straight pipe, what a Nancy the OP must be.
i_c_the_light is online now   Reply With Quote
Old 04-09-2013, 07:11 AM   #22
Jack
Add Lightness
Moderator
 
Member#: 13699
Join Date: Dec 2001
Chapter/Region: NESIC
Location: Hopkinton, MA
Vehicle:
2007 Lotus Elise
(From General)

Default

Go to a good exhaust shop. One that specializes in non-stock, make it on the fly needs. I don't know who that is in your area, search around. Tell them that you want to quiet your car down. Silencers between the turbo and the muffler will help a lot. You don't have to limit yourself to only one. This is very much not rocket science. Adding a high flow cat is another option (along with silencers) but more expensive. Cats take the "bark" down a level.
Jack is offline   Reply With Quote
Old 04-09-2013, 07:15 AM   #23
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

****.....put a stock exhaust on it and a cut out

done
Uncle Scotty is offline   Reply With Quote
Old 04-09-2013, 07:29 AM   #24
ducktape69
Scooby Newbie
 
Member#: 352166
Join Date: Apr 2013
Location: Sydney, Australia
Vehicle:
2012 STi Spec R
Black

Default

stock sound is best IMHO
ducktape69 is offline   Reply With Quote
Old 04-09-2013, 07:29 AM   #25
Loyale93
Scooby Guru
 
Member#: 91347
Join Date: Jul 2005
Chapter/Region: NESIC
Location: Moscow, Russia
Vehicle:
'13 XV Crosstrek,
1050 Triumph Speed Triple

Default

Quote:
Originally Posted by Jack ffr1846 View Post
Go to a good exhaust shop. One that specializes in non-stock, make it on the fly needs. I don't know who that is in your area, search around. Tell them that you want to quiet your car down. Silencers between the turbo and the muffler will help a lot. You don't have to limit yourself to only one. This is very much not rocket science. Adding a high flow cat is another option (along with silencers) but more expensive. Cats take the "bark" down a level.
But I have 14 turbos on my car and digital fuel injection with an aqua mist 15000 HD lightning system to provide 47 pounds of boost at 500 rpm!!
My car is lightly modified, but I need help because it's too loud.

Do you guys think if I play Kenny G instead of driving to San Francisco that will help out with the exhaust volume while in 3rd gear?
Loyale93 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 02:02 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.