Welcome to the North American Subaru Impreza Owners Club Sunday August 2, 2015
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 > Other Engine Management

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 11-11-2009, 11:39 AM   #1
PirateSanchez
Scooby Newbie
 
Member#: 106020
Join Date: Jan 2006
Default Calibrating wideband, changing WEGO GRAD CAL question...

As some of you know, I have been trying to get to the bottom of my poor fuel economy issues with my gt35r STi. Conservative driving yields less than 10mpg combined.

After a lot of detective work, I have become suspicious of my wideband sensor. The tune is great (by Scott Siegel), and after emailing Phil (who is a very nice, professional guy), he suggested that I check the calibration of my wideband sensor, so I followed the instructions.

Anyway, the second part of the wideband calibration process is to modify the WEGO GRAD CAL value to ensure that the sensor reads between 20.7-20.8 in free air. Mine read 19.6 prior to adjusting this value. Following the instructions, I adjusted this value to 230, which yielded the required reading of 20.7.

Now my question is this, is this a setting that is saved in the hydra itself or is it simply a software setting in the nemesis tuning program? Basically, I am curious if changing the wego grad cal value will solve my fuel economy problems.

Thoughts? I just re-read my post and I hope that I am making sense.

Thanks everyone!
* Registered users of the site do not see these ads.
PirateSanchez is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 11-11-2009, 12:13 PM   #2
Element Tuning
Former Vendor
 
Member#: 54918
Join Date: Feb 2004
Chapter/Region: MAIC
Location: Gaithersburg, MD
Vehicle:
673 WHP Element
Tuning Pro Comp Engine

Default

The Zero Grad Cal and the Wego Grad Cal are part of your map. So if you load a new map you need to enter those calibrated values.

Hydra 2.5 and older is calibrated free air to 20.7

Hydra 2.6 is calibrated free air to 21.5

If your car was tuned with an incorrectly calibrated sensor or you were running "closed" loop fuel control with the wrong settings then yes your fuel economy would suffer.

My 08 WRX gets about 16 mpg mostly city driving and having fun. On the highway we were getting over 400 miles to the tank which worked out to about 29 mpg. For you to only be getting 10 mpg you are either driving in boost more than you think or your tune is WAAAAAAYYYYYY off.
Element Tuning 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
Post grad school question. DEY tooK DEr JERB!! Keith Off-Topic 53 10-27-2008 09:10 PM
Wideband o2 and Apexi NEO questions???? Rallly2000 Newbies & FAQs 10 10-09-2006 01:09 AM
Normal to have to calibrate wideband after 3 weeks? JDM 3SGTE Engine Management & Tuning 12 12-29-2005 08:30 AM
Changing height and alignment question ebeck Brakes, Steering & Suspension 8 06-24-2005 02:39 PM
Changed coolant - post-op questions! TimStevens Service & Maintenance 6 08-20-2003 07:25 AM


All times are GMT -4. The time now is 01:45 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.