Welcome to the North American Subaru Impreza Owners Club Tuesday September 23, 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 > AccessPort

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 02-21-2007, 05:46 PM   #1
d40winker
Scooby Newbie
 
Member#: 128010
Join Date: Oct 2006
Chapter/Region: Tri-State
Location: NJ
Vehicle:
2002 Impreza WRX
white

Default Accuracy of AP live boost read

Hey everyone,

Since the AP is reading the bost from the ecu, is it as accurate as the oem boost gage? Im upping my wastegate actuator and the readings are quite different from the gauge to the AP live boost. Any ideas?
* Registered users of the site do not see these ads.
d40winker is offline   Reply With Quote
Old 02-21-2007, 06:14 PM   #2
Airboy
Scooby Specialist
 
Member#: 72829
Join Date: Oct 2004
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2006 WRX
EFR6758

Default

How different is "quite different"?
Airboy is offline   Reply With Quote
Old 02-21-2007, 10:53 PM   #3
d40winker
Scooby Newbie
 
Member#: 128010
Join Date: Oct 2006
Chapter/Region: Tri-State
Location: NJ
Vehicle:
2002 Impreza WRX
white

Default

I push .1 bar on stock gauge which is I think 14.7 psi, and the AP is reading 16.4.
d40winker is offline   Reply With Quote
Old 02-22-2007, 01:01 PM   #4
parker/slc/gc8fan
Scooby Specialist
 
Member#: 46241
Join Date: Oct 2003
Chapter/Region: RMIC
Location: Tinsel Towers. Apt. 29
Vehicle:
- RIP
SDF-1

Default

I would consider the AP more accurate.

It's simply interperating the what the stock ECU thinks your boost is.
parker/slc/gc8fan is online now   Reply With Quote
Old 02-23-2007, 09:36 AM   #5
d40winker
Scooby Newbie
 
Member#: 128010
Join Date: Oct 2006
Chapter/Region: Tri-State
Location: NJ
Vehicle:
2002 Impreza WRX
white

Default

That's strange I would think the boost gauge would be more accurate because of the fact that it's tapped in, not just electronically reading it. Any other input?
d40winker is offline   Reply With Quote
Old 02-23-2007, 10:26 PM   #6
Force
Scooby Specialist
 
Member#: 123515
Join Date: Aug 2006
Location: park ridge, Illinois
Vehicle:
2005 vette c6 z51
LeMans Blue

Default

I think that the ECU is the most accurate, especially if you have a mechanical boost gauge....I mean it's like doing math by hand vs. using a calculator...the calculator will always be a step faster and a step more accurate 99% of the time. The sensors in the engine are more accurate than the spring in a mechanical boost gauge IMO. However, both my AP and Mech. boost gauge read about the same and at most are maybe .5 PSI different sometimes.
Force is offline   Reply With Quote
Old 02-23-2007, 10:42 PM   #7
El Capitan
Scooby Specialist
 
Member#: 121261
Join Date: Jul 2006
Chapter/Region: TXIC
Location: New Bern, NC
Vehicle:
06 STG 2+ STi
CGM

Default

If you are talking about the colum mounted boost gauge, it isn't reading bars. The stock gauge reads in MPa & .1MPa is 14.5psi.

16.5psi is .113MPa. I'd say that based on how small that gauge is that the AP and the gauge are real close. I have the same set up and it's pretty much the same based on trying to look down and drive at the same time.

Convertion tool link.
http://www.chapelsteel.com/psi-mpai.html

Last edited by El Capitan; 02-23-2007 at 10:50 PM.
El Capitan is offline   Reply With Quote
Old 02-25-2007, 07:15 PM   #8
Silver_Bell_WRX
Scooby Specialist
 
Member#: 7677
Join Date: Jun 2001
Location: Burlington, VT
Vehicle:
2005 WRX
Blue

Default

My ap and autometer boost guages both read the same up to the limits of what the ap will read. Max boost ap reads is 18.4 were a regular boost gauge can read higher if it has the range.
Mike
Silver_Bell_WRX is offline   Reply With Quote
Old 03-02-2007, 10:15 AM   #9
jruben4
Scooby Newbie
 
Member#: 50784
Join Date: Dec 2003
Chapter/Region: MWSOC
Location: Milwaukee, WI
Vehicle:
2005 STi
WRB

Default

Quote:
Originally Posted by d40winker View Post
That's strange I would think the boost gauge would be more accurate because of the fact that it's tapped in, not just electronically reading it. Any other input?
I thought the stock boost gauge reads the ECU boost data, not a true vacuum line - doesn't it install with just an electrical connection?
jruben4 is offline   Reply With Quote
Old 03-02-2007, 04:23 PM   #10
VWGrk1
Scooby Specialist
 
Member#: 57882
Join Date: Mar 2004
Chapter/Region: MWSOC
Location: Chicago
Vehicle:
2004 WRX
WRB

Default

No, the boost line is T'd off from the BPV line.
VWGrk1 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
V1 Live boost reading kooklie AccessPort 2 06-30-2009 04:55 PM
Boosting 17.1 on AP Live boost on Stage 2 06WRXTR AccessPort 14 02-15-2007 11:36 AM
live boost readings? -=EJ20T=- AccessPort 4 07-31-2006 04:52 PM
Something wrong with AP Live Boost Reading? sandwi54 Engine Management & Tuning 6 02-04-2006 06:21 PM
Accuracy of the factory boost gauge. Boosted Factory 2.0L Turbo Powertrain 3 02-24-2002 05:14 PM


All times are GMT -4. The time now is 08:47 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.