Welcome to the North American Subaru Impreza Owners Club Friday April 18, 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 01-13-2004, 11:38 AM   #1
STI-ITS
Scooby Newbie
 
Member#: 40805
Join Date: Jul 2003
Vehicle:
04 WRX STI
JAVA BLACK

Default What is the best product for my STi

I am thinking bout getting and uppipe, downpipe, and exhaust....i was just wondering what brand i should buy and which would be most effetcive with my o4 STi...I also am trying to ahve no cats and sumthing with a low grummble but still loud enough that people will notice me when i drive by... if you could please tell me what you think would be the best....thank you
* Registered users of the site do not see these ads.
STI-ITS is offline   Reply With Quote
Old 01-13-2004, 11:57 AM   #2
T3RMIN4L
Scooby Specialist
 
Member#: 37434
Join Date: May 2003
Chapter/Region: Tri-State
Location: South Jersey
Default

I wouldnt change the uppipe unless you get a header as the stock STi uppipe is already without cat.
T3RMIN4L is offline   Reply With Quote
Old 01-13-2004, 12:03 PM   #3
pierceman
Scooby Newbie
 
Member#: 44903
Join Date: Oct 2003
Vehicle:
2002 NSXsupercharged
silverstone/black/black

Default

aps down pipe and twin tip exhaust get my vote, very well built, Perrin also makes a great setup. both are $$ but if you have the $$ get it.
pierceman is offline   Reply With Quote
Old 01-13-2004, 12:08 PM   #4
STFUTuning
Scooby Newbie
 
Member#: 40729
Join Date: Jul 2003
Location: Valencia, CA
Vehicle:
2004 STi, EVO
AEM Factory Trained Tuner

Default

Race school
STFUTuning is offline   Reply With Quote
Old 01-13-2004, 12:26 PM   #5
elucas730
Scooby Specialist
 
Member#: 42714
Join Date: Sep 2003
Chapter/Region: Tri-State
Location: Apalachin, NY
Vehicle:
'07 BMW 335i E90

Default

Your question is a bit general. What are your goals? What are you willing to trade off? Do you want cheaper, or do you want the best performance? My suggestion is you do research yourself rather than ask people what is "the best". Here's some starting places:

First, as stated earlier, there is no cat in the uppipe, so you shouldn't have to change the uppipe first thing.
As for exhaust, there are many options for you. APS, Perrin, TurboXS, AVO, Greddy EVO, Invidia, Zerosports. I think I will be going with a catless downpipe from Godspeed and a Blitz Nur-Spec Racing cat-back exhaust as StaticX shows here:

http://www.imprezawrxsti.com/postnuk...ewtopic&t=5484

Be aware that a full turbo-back exhaust will cause boost creep unless you port the wastegate on the stock turbo. Because of this, some people are waiting for UTEC engine management to come out.
elucas730 is offline   Reply With Quote
Old 01-13-2004, 02:47 PM   #6
RichQY
Scooby Specialist
 
Member#: 31948
Join Date: Jan 2003
Location: SoCal
Vehicle:
2004 STi
Aspen White

Default

Quote:
Originally posted by STFUTuning
Race school
i second that
RichQY is offline   Reply With Quote
Old 01-13-2004, 02:55 PM   #7
silverstipa
Scooby Specialist
 
Member#: 42271
Join Date: Aug 2003
Location: Columbia, MD
Vehicle:
2004 STI - FPgreen
Enjoyed by a new owner

Default

Ultra go-fast stickers....gotta be worth at least 100whp!!!
silverstipa is offline   Reply With Quote
Old 01-13-2004, 04:11 PM   #8
silverscooby
Scooby Specialist
 
Member#: 15060
Join Date: Feb 2002
Location: NC
Default

I'd say intake (Blitz SUS, etc) , downpipe (Godspeed, etc), and a boost controller (MBC or EBC) along with a good set of gauges (Boost, EGT, Oil Temp, etc)

Don't have to worry about boost creep with the stock turbo as long as you're using the stock axleback. Stock looking/sounding car with a substantial increase in power.
silverscooby is offline   Reply With Quote
Old 01-13-2004, 04:28 PM   #9
DISCOPOPE
Scooby Specialist
 
Member#: 43339
Join Date: Sep 2003
Location: mpls, mn
Vehicle:
2oo4 STi
URgt35r w/t3hM3finj3cki0n

Default

Quote:
Originally posted by silverscooby
I'd say intake (Blitz SUS, etc) , downpipe (Godspeed, etc), and a boost controller (MBC or EBC) along with a good set of gauges (Boost, EGT, Oil Temp, etc)

Don't have to worry about boost creep with the stock turbo as long as you're using the stock axleback. Stock looking/sounding car with a substantial increase in power.
DISCOPOPE is offline   Reply With Quote
Old 01-13-2004, 09:02 PM   #10
Golfa
Scooby Guru
 
Member#: 21394
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Rye, NH
Vehicle:
Sold 2004 STi
08 WW Evo X

Default

Quote:
Originally posted by elucas730
Your question is a bit general. What are your goals? What are you willing to trade off? Do you want cheaper, or do you want the best performance? My suggestion is you do research yourself rather than ask people what is "the best". Here's some starting places:

First, as stated earlier, there is no cat in the uppipe, so you shouldn't have to change the uppipe first thing.
As for exhaust, there are many options for you. APS, Perrin, TurboXS, AVO, Greddy EVO, Invidia, Zerosports. I think I will be going with a catless downpipe from Godspeed and a Blitz Nur-Spec Racing cat-back exhaust as StaticX shows here:

http://www.imprezawrxsti.com/postnuk...ewtopic&t=5484

Be aware that a full turbo-back exhaust will cause boost creep unless you port the wastegate on the stock turbo. Because of this, some people are waiting for UTEC engine management to come out.

nice post, good advice
Golfa is offline   Reply With Quote
Old 01-13-2004, 09:36 PM   #11
qbbraveheart
Scooby Newbie
 
Member#: 49043
Join Date: Nov 2003
Location: Mt. Pocono, PA/Queens, NY
Default

engine management WILL NOT cure boost creep...the boost creep is a result of a bad design errrr small wastegate on the turbo....get it ported by sending it to DeadBolt

engine management wont hurt either if you start getting some serious mods or just want to enhance the performance of the mods you have on your car now
qbbraveheart is offline   Reply With Quote
Old 01-13-2004, 09:37 PM   #12
qbbraveheart
Scooby Newbie
 
Member#: 49043
Join Date: Nov 2003
Location: Mt. Pocono, PA/Queens, NY
Default

Quote:
Originally posted by silverscooby
I'd say intake (Blitz SUS, etc) , downpipe (Godspeed, etc), and a boost controller (MBC or EBC) along with a good set of gauges (Boost, EGT, Oil Temp, etc)

Don't have to worry about boost creep with the stock turbo as long as you're using the stock axleback. Stock looking/sounding car with a substantial increase in power.
and i agree with this 100%
i plan on going this route when i get mine and until i can get some engine management
but just starting out im sticking with the simple stuff
qbbraveheart is offline   Reply With Quote
Old 01-14-2004, 10:55 AM   #13
wrxman02
Scooby Specialist
 
Member#: 24162
Join Date: Sep 2002
Chapter/Region: Tri-State
Location: Pennsylvania
Vehicle:
2014 Legacy 2.5i
2012 Impreza 2.0i

Default

lots of track days. then once that is achieved , many more track days.
oh yeah f/r STi strut tower bars
and my favorite. STi pink sport springs. and a great alighnment. and a STi air cleaner . and your ready for some more track days and autox events. then yopu can buy some r compounds. . oh yeah more track days.
later
andy
wrxman02 is offline   Reply With Quote
Old 01-14-2004, 11:36 AM   #14
RoninSTI
Scooby Specialist
 
Member#: 49278
Join Date: Nov 2003
Chapter/Region: NESIC
Location: New England
Vehicle:
11 STI
SWP

Default

Quote:
Originally posted by qbbraveheart
engine management WILL NOT cure boost creep...the boost creep is a result of a bad design errrr small wastegate on the turbo....get it ported by sending it to DeadBolt

engine management wont hurt either if you start getting some serious mods or just want to enhance the performance of the mods you have on your car now
Engine management can cure boost creep by altering the maps that control the wastegate actuator.
Porting is also a solution.
RoninSTI is offline   Reply With Quote
Old 01-14-2004, 01:18 PM   #15
Rated R1
Scooby Newbie
 
Member#: 27697
Join Date: Oct 2002
Chapter/Region: South East
Location: Lexington, SC
Vehicle:
'93 RX-7 R1
'04 STi Silver\Silver

Default

Boost creep cannot be solved by altering the maps. True boost creep is when the wastegate is fully open and the boost continues to increase. Changing the maps will not help this. The only solution is porting the wastegate or restricting exhaust flow. Trust me we have dealt with this for years with the 3rd gen RX-7s.
Rated R1 is offline   Reply With Quote
Old 01-14-2004, 02:22 PM   #16
qbbraveheart
Scooby Newbie
 
Member#: 49043
Join Date: Nov 2003
Location: Mt. Pocono, PA/Queens, NY
Default

Quote:
Originally posted by RoninSTI
Engine management can cure boost creep by altering the maps that control the wastegate actuator.
Porting is also a solution.
nope sorry...boost creep on an internal wastegate is a physical/mechanical design flaw...not a electrical design flaw


Quote:
Originally posted by Rated R1
Boost creep cannot be solved by altering the maps. True boost creep is when the wastegate is fully open and the boost continues to increase. Changing the maps will not help this. The only solution is porting the wastegate or restricting exhaust flow. Trust me we have dealt with this for years with the 3rd gen RX-7s.

Thank You.
qbbraveheart is offline   Reply With Quote
Old 01-14-2004, 02:30 PM   #17
STI-ITS
Scooby Newbie
 
Member#: 40805
Join Date: Jul 2003
Vehicle:
04 WRX STI
JAVA BLACK

Default

ok i looked on mauro motorsport at some exhaust an di was looking at the cat-back exhaust system......http://mauromotorsports.com/catexsys.html....i want to either get the HKS Carbon Titanium Exhaust , Blitz Nur Spec Cat-Back Exhaust - WRX / STi, Apexi GT Spec Exhaust -WRX / STi , or JIC 505 Stainless Steel Cat Back.....i wanna have my car it has no cats.....I have no ctas in my uppipe ....i wanna get a down pipe and exhaust.....i would liek to stick to one brand and no mix and match.....i plan on later getting a Front mount.....if you guys coud please hook em up with some ideas on what to go with.....also i wanan shoot flames too if possible...i ahve seen it done on sti's.
STI-ITS is offline   Reply With Quote
Old 01-14-2004, 02:51 PM   #18
qbbraveheart
Scooby Newbie
 
Member#: 49043
Join Date: Nov 2003
Location: Mt. Pocono, PA/Queens, NY
Default

haha shooting flames is a result of running a catless setup and running rich

as for exhaust..JIC and HKS make the best hp from what i have seen....i dont know about the rest so im not sure
you really cant have all one name brand company turboback exhaust....only 1 or 2 i believe offer a turbo back

mix and match is better IMO...
im going with Godspeed DP and JIC cat-back
theres nothing wrong with mixing and matching
qbbraveheart is offline   Reply With Quote
Old 01-14-2004, 02:52 PM   #19
silverscooby
Scooby Specialist
 
Member#: 15060
Join Date: Feb 2002
Location: NC
Default

If you do go catless I'd recommend getting the turbo wastegate ported to eliminate boost creep. Look around on the board and you'll see numerous posts about this problem.

You can take the turbo off and send it tohttp://www.deadboltspeed.com/ and have it done.
silverscooby is offline   Reply With Quote
Old 01-14-2004, 04:02 PM   #20
bcblues
Scooby Specialist
 
Member#: 17256
Join Date: Apr 2002
Chapter/Region: MWSOC
Location: America's Outback
Vehicle:
04 STi
Blue w/ custom bug splat

Default

You don't know flames until you have run an RX7 catless with huge turbos and injectors.
bcblues is offline   Reply With Quote
Old 01-14-2004, 04:08 PM   #21
The Donnn
Scooby Specialist
 
Member#: 33178
Join Date: Feb 2003
Location: Li, NY SUCKA
Vehicle:
SQC 106

Default

get a b&b turboback with the cat. then get the little metal restrictor from a td04 wrx turbo. viola, no boost creep.
The Donnn is offline   Reply With Quote
Old 01-14-2004, 04:16 PM   #22
RoninSTI
Scooby Specialist
 
Member#: 49278
Join Date: Nov 2003
Chapter/Region: NESIC
Location: New England
Vehicle:
11 STI
SWP

Default

Not to beat a dead horse qb, but wasnt vishnu able to eliminate the boost creep issue on their stage 1 package by altering the actuator maps? I'm sure we've all read the novel that is the vishnu post...I just want get the info straight.
thanks
RoninSTI is offline   Reply With Quote
Old 01-14-2004, 04:17 PM   #23
STFUTuning
Scooby Newbie
 
Member#: 40729
Join Date: Jul 2003
Location: Valencia, CA
Vehicle:
2004 STi, EVO
AEM Factory Trained Tuner

Default

I know I said race school earlier, but I change my mind. Dual rocket lanchers are the way to go.

Disclaimer: I am in a bad mood today, therefore I feel destrucive.
STFUTuning is offline   Reply With Quote
Old 01-14-2004, 04:31 PM   #24
DISCOPOPE
Scooby Specialist
 
Member#: 43339
Join Date: Sep 2003
Location: mpls, mn
Vehicle:
2oo4 STi
URgt35r w/t3hM3finj3cki0n

Default

Quote:
Originally posted by RoninSTI
Engine management can cure boost creep by altering the maps that control the wastegate actuator.
Porting is also a solution.

not if the actual physical outlet is inefficiant in venting the required volumes....
DISCOPOPE is offline   Reply With Quote
Old 01-14-2004, 06:26 PM   #25
qbbraveheart
Scooby Newbie
 
Member#: 49043
Join Date: Nov 2003
Location: Mt. Pocono, PA/Queens, NY
Default

Quote:
Originally posted by DISCOPOPE
not if the actual physical outlet is inefficiant in venting the required volumes....
or you could of just quoted my reply and said im with stupid

qbbraveheart 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
What is the best look for my XT??? randolph-rs Member's Car Gallery 36 12-24-2007 03:07 PM
What is the best axleback for our STIs sound wise? 1FSTREX Newbies & FAQs 5 11-25-2006 02:02 AM
What is the best turbo for my 02 WRX? 2$SPIFF Factory 2.0L Turbo Powertrain 24 09-20-2006 06:16 PM
what is the best exaust for my impraza?!? mayniak Newbies & FAQs 37 08-23-2006 11:00 PM
What is the best oil for a Sti? B-85 South West Impreza Club Forum -- SWIC 0 09-11-2004 11:06 AM


All times are GMT -4. The time now is 12:23 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.