Welcome to the North American Subaru Impreza Owners Club Monday December 22, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
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.
Thread Tools Display Modes
Old 09-19-2014, 11:50 AM   #1
Scooby Newbie
Member#: 378926
Join Date: Jan 2014
Chapter/Region: SWIC
Location: Gilbert, AZ
2004 Baja Turbo

Default Help me understand cars stock tunes

I'm trying to understand why cars are tuned the way they are from the factory.

Boost- Why does an FXT tune have .77 for boost everywhere unless it's building boost in the high rpms. This in comparison to an STI tune which is -6 and -13 in places

WGDC- FXT is generally higher everywhere. I assume this is because of the smaller turbo.

Timing- FXT is generally higher everywhere. Again assume because the STI has higher boost

Really just trying to understand the boost/wgdc relationship and why the sti is so negative....

* Registered users of the site do not see these ads.
Speedme3 is offline   Reply With Quote
Old 09-20-2014, 02:31 AM   #2
Scooby Newbie
Member#: 341649
Join Date: Dec 2012


One of those is a volume knobb, the others are like equalizers.
Subaru wanted a turbo that gives good low-midrange kick so daily driving can be impressive, they also know that if they stretch that turbo to perform low, mid and high, the high end would stress the turbo.

So, they jumped to ignition timing and used that to make up for power up top. While upping the timing they lowered the boost and made fuel richer for safety.
JMlegacy is offline   Reply With Quote

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 04:15 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.