Welcome to the North American Subaru Impreza Owners Club Sunday April 20, 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 11-20-2012, 11:28 AM   #26
BrendanTheGreat408
Scooby Specialist
 
Member#: 271207
Join Date: Jan 2011
Chapter/Region: BAIC
Location: Morgan Hill, CA
Vehicle:
2011 WRX
SWP

Default

Quote:
Originally Posted by NoGraffix View Post
It was a simple over-boost. It sounds like you attempted to go WOT in too high of a gear (5th?) where you had a high load situation. Since you didn't mention you had an EWG I'm assuming you dont and your IWG was unable to compensate for the amount of air the car was flowing. This caused the turbo to pressurize an excess amount of air. The MAP sensors saw you reached a certain defined limit and cut the fuel in order to stop the over boosting.

You learned a lesson; don't go WOT in high gears, always down shift. You can also inform eric of this happening and he can likely adjust the WGDC and TD tables to help prevent this (possibly even raise the limit since 21 psi isn't all that high). It's likely he wuill tell you to stay off WOT when in a high gear situation.
It actually happened in 4th around those exact RPMs however I dont think i was WOT when it happened since I was still in between getting the tune finalized.

Quote:
Originally Posted by NoGraffix View Post
An EWG is the only fix for a true boost creep/spike. If its poor tuning or the stock bcs issue those can be fixed with well proper tuning and a 3-port solenoid. Porting the IWG can help, but often you will still experience creep if your running an excess of 21 psi (as me how I know). Sounds to me like the OP has a case of unfinished tune. He put a new top mount on, the tuner turned up the boost a bit (since he can now, no more crappy plastic end tanks) and hasn't fully adjusted the WGDC or TD tables to properly achieve targeted boost.
I plan to add my EWG via protune soon
* Registered users of the site do not see these ads.
BrendanTheGreat408 is offline   Reply With Quote
Old 11-20-2012, 01:33 PM   #27
Tripintaz
Scooby Specialist
 
Member#: 245218
Join Date: Apr 2010
Chapter/Region: South East
Location: FL
Vehicle:
2013 STI Limited

Default

Quote:
Originally Posted by NoGraffix View Post
An EWG is the only fix for a true boost creep/spike. If its poor tuning or the stock bcs issue those can be fixed with well proper tuning and a 3-port solenoid. Porting the IWG can help, but often you will still experience creep if your running an excess of 21 psi (as me how I know). Sounds to me like the OP has a case of unfinished tune. He put a new top mount on, the tuner turned up the boost a bit (since he can now, no more crappy plastic end tanks) and hasn't fully adjusted the WGDC or TD tables to properly achieve targeted boost.

09+ cars boost creep easily when an aftermarket intake is used along with a catless turboback exhaust. You might be able to tune some of it out, but I would bet the OP's WGDC's are at 0% when he saw overboost in 4th gear. A 3 port EBCS can help as well, but you cant tune the WGDC below 0%. The best advice for the OP is either EWG or throw the stock intake back on and adjust the tune. The EWG will solve the boost creep. The stock intake and re-tune may not completely eliminate the problem but it would make it less of an issue.
Tripintaz 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 03:20 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.