Welcome to the North American Subaru Impreza Owners Club Saturday August 30, 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 > Engine Management & Tuning

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 12-15-2005, 03:55 PM   #1
Sti"izzle"
Scooby Newbie
 
Member#: 77879
Join Date: Dec 2004
Chapter/Region: BAIC
Location: Chico, Ca
Vehicle:
2005 Saab 9-2x
Artic Silver

Default 05 Sti Custom tuned- Help with header tuning

I have an 05 Sti with a Turbo back exhaust, injen intake and recently got it dyno tuned by a local shop with cobb protuner. After the tune, I got borla headers. The car seems to have a little more top end, but low and mid range seem to be more than a little sluggish. My question is: Is it possible that my car has lees hp with the headers on there, since it isn't tuned for headers? Will getting it tuned with the headers make a "very noticable difference?"

Please help.
* Registered users of the site do not see these ads.
Sti"izzle" is offline   Reply With Quote
Old 12-15-2005, 04:35 PM   #2
hondaeater69
Scooby Guru
 
Member#: 60324
Join Date: Apr 2004
Location: a pillow.
Default

yes it's possible you are making less overall power with headers 'untuned'. THis is a mod that is not within the learning specs of the ECU and should be retuned for.
hondaeater69 is offline   Reply With Quote
Old 12-15-2005, 08:34 PM   #3
jmussetter
Scooby Newbie
 
Member#: 15350
Join Date: Feb 2002
Location: Bay Area, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Default

Keep in mind however, that Even with different tuning, MOST(maybe ALL) aftermarket headers will be more laggy in the low and mid-range.

I have Megan Racing headers now and they cracked, so I just finished the Port 'n' Polish on stock manifolds earlier this week. I almost looking forward to seeing the better low end again...

My .02

-jason
jmussetter is offline   Reply With Quote
Old 12-15-2005, 09:19 PM   #4
2fas4u
Scooby Specialist
 
Member#: 90691
Join Date: Jul 2005
Chapter/Region: MAIC
Location: Manchester, Maryland
Vehicle:
2005 STI / 2009 STI
Blue

Default

With headers and not being tuned you will give up low end tourqe. It can be tuned though. On my stock turbo setup I had about 269 Ft lbs of torque at 2600 rpm, that was monsterous!
2fas4u is offline   Reply With Quote
Old 12-15-2005, 09:56 PM   #5
2phless
Scooby Specialist
 
Member#: 69343
Join Date: Aug 2004
Chapter/Region: South East
Location: 'tween Lewisville&Clemmons NC
Vehicle:
1998 TransAm cnvrtbl
Black

Default

Potential for more taper at the top end too. I had to add to the boost map up high. But that'll depend a lot on the turbo as well. Mine's a little Kong II, which is about like stock.
2phless 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
Will Cobb tuning help with TBE? clbd39 AccessPort 37 02-28-2006 01:11 PM
Tuning help with CAI hrmax Engine Management & Tuning 4 11-03-2004 08:43 PM
Help with Motec Tuning aaird Engine Management & Tuning 2 10-28-2004 12:44 AM
Need Local Help with UTEC Tuning SubawuWRX New England Impreza Club Forum -- NESIC 8 08-30-2003 06:37 PM
Need help with final tuning of Turbo yebokmj New England Impreza Club Forum -- NESIC 5 03-02-2001 02:53 PM


All times are GMT -4. The time now is 11:43 PM.


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.