Welcome to the North American Subaru Impreza Owners Club Wednesday September 3, 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 Technical > Factory 2.5L Turbo Powertrain

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 10-03-2013, 05:53 PM   #1
Boostedbob
Scooby Newbie
 
Member#: 336241
Join Date: Oct 2012
Chapter/Region: MWSOC
Location: Colorado, New Mexico
Vehicle:
08 Sti
OPB

Default Blown baffles invidia q300

It's curious if anyone has any issues with there baffles on there q300(hatch).

I'm running a built motor on a 60-1 full bolt on's with a cattless dp, tomei el header and I got a nasty rasp at 2800-3000rpm's had a smoke test done on the car only leaks I had where from the muffler itself around the crimped edges. All gaskets looked good from the header all the way to the muffler. I dropped the car off to the mechanic and he heard the same thing.

Could this be due to me running the el header or are my baffles blown?

I was running a Perrin cartted dp and had no issues. I do know running catless will increase the volume but this rasp sounds like ass.

Is it time to upgrade my cat back? Any suggestions?
* Registered users of the site do not see these ads.
Boostedbob is offline   Reply With Quote
Old 10-03-2013, 09:25 PM   #2
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

Why would a header have an effect on a smoke test showing your muffler?

Honestly, if you have a busted ass muffler, replace it and go from there. "Raspy" is relative and there isn't much else to tell you.
HinshawWRX is offline   Reply With Quote
Old 10-03-2013, 09:43 PM   #3
Boostedbob
Scooby Newbie
 
Member#: 336241
Join Date: Oct 2012
Chapter/Region: MWSOC
Location: Colorado, New Mexico
Vehicle:
08 Sti
OPB

Default

My thoughts weren't exactly organized, but felt it was relevant information as the exhaust tone is a bit higher pitch compared to the normal uel header sound.

As for the smoke test was just saying there was no smoke coming from any of the usual suspect areas.

I'm more concerned about the muffler. Not sure if the baffles are blown or if I'm hitting a certain resonance where I sound like a honda with a nasty exhaust leak from 2800rpms to 3000rpms.

Make more sense?
Boostedbob is offline   Reply With Quote
Old 10-03-2013, 09:53 PM   #4
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

Still stands, replace muffler if you're that worried about it.
HinshawWRX is offline   Reply With Quote
Old 10-03-2013, 10:47 PM   #5
20wrx09
Scooby Specialist
 
Member#: 207417
Join Date: Apr 2009
Chapter/Region: Tri-State
Location: Rensselaer, NY
Vehicle:
2009 WRX
td06sl2-20gtx 413/423

Default

It's a combination of your cat less downpipe and the equal length header. Add a resonator or put a different muffler on the car to get rid of the rasp.
20wrx09 is offline   Reply With Quote
Old 10-03-2013, 10:50 PM   #6
Boostedbob
Scooby Newbie
 
Member#: 336241
Join Date: Oct 2012
Chapter/Region: MWSOC
Location: Colorado, New Mexico
Vehicle:
08 Sti
OPB

Default

Thanks hinshaw and 20g I'm going to be giving nameless a call tomorrow. Hate sounding like ass.
Boostedbob is offline   Reply With Quote
Old 10-03-2013, 11:36 PM   #7
trev762
Scooby Specialist
 
Member#: 280572
Join Date: Apr 2011
Chapter/Region: E. Canada
Location: southern ontario canada
Vehicle:
2011 sti sedan
plasma blue pearl

Default

Quote:
Originally Posted by Boostedbob View Post
Thanks hinshaw and 20g I'm going to be giving nameless a call tomorrow. Hate sounding like ass.
R u using a BOV or BPV, and or a hybrid setup cuz with using a bov or hybrid setup it wont matter what muffler u use as u will blow the baffles out eventually anyways from "after fire" in between shifts.
trev762 is offline   Reply With Quote
Old 10-04-2013, 01:04 AM   #8
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

junk muffla....my stromung is well over 200k miles since 2003 and still sounds great
Uncle Scotty is offline   Reply With Quote
Old 10-04-2013, 02:20 PM   #9
Boostedbob
Scooby Newbie
 
Member#: 336241
Join Date: Oct 2012
Chapter/Region: MWSOC
Location: Colorado, New Mexico
Vehicle:
08 Sti
OPB

Default

Lol Scotty yeah I'm getting that feeling.

@Trev I was on the stock bpv with the Tmic when the issue first started happening , when I went Fmic I am running a greddy bov set to full recirc. I do get some after fires but not a lot.
Boostedbob is offline   Reply With Quote
Old 10-04-2013, 03:00 PM   #10
Never Summer
Scooby Newbie
 
Member#: 349361
Join Date: Mar 2013
Chapter/Region: Tri-State
Location: Long Island, NY
Vehicle:
2013 STi
SWP

Default

Quote:
Originally Posted by Uncle Scotty View Post
junk muffla....my stromung is well over 200k miles since 2003 and still sounds great
Junk is correct. Nameless all the way!!!!!!!!!!!!
Never Summer is offline   Reply With Quote
Old 10-05-2013, 04:52 AM   #11
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

Quote:
Originally Posted by Boostedbob View Post
Lol Scotty yeah I'm getting that feeling.

@Trev I was on the stock bpv with the Tmic when the issue first started happening , when I went Fmic I am running a greddy bov set to full recirc. I do get some after fires but not a lot.

if you are full recirc....you shouldnt have any afterfires unless ya got a leak

find it
Uncle Scotty is offline   Reply With Quote
Old 10-05-2013, 12:42 PM   #12
Boostedbob
Scooby Newbie
 
Member#: 336241
Join Date: Oct 2012
Chapter/Region: MWSOC
Location: Colorado, New Mexico
Vehicle:
08 Sti
OPB

Default

^
Yep, just went going through everything all couplers where loose(tbolt clamps) Vac hose going to the greddy was incredibly loose. the adapters running to a few of my other vacuum hoses where not the right size(to loose for comfort).

Got that taken care of and wgdc are where they should be now. Talked to the guy who did my setup and he apologized and went out of his way to fix everything else I could not get too.

As for the muffler ill be getting a Nameless Cat back exhaust and hope this takes care of some of my issues sounding like ass
Boostedbob 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 02:38 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.