Welcome to the North American Subaru Impreza Owners Club Saturday July 12, 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 2.0L 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 05-29-2002, 06:28 PM   #1
pehavens
Scooby Newbie
 
Member#: 11821
Join Date: Oct 2001
Question question on stock WRX turbo guage

Can someone give me an explanation ...

I have the optional turbo guage installed by the dealer and I am not sure how to read it. Often I have seen posts describing the boost level in number between 12 to 16 or more (I am assuming this is PSI). The guage I have ranges from -.1 to .15. The highest I have seen it is about .9. Everything else is stock on my WRX. Can someone tell me how to convert this? And why is it negative at times?

Another question I have. I am not sure why the turbo only spools up for a second when the throttle is pressed and the transmission is not engaged. Does this mean that the turbo fan only spins if the car is in gear. What exactly is being messured by the guage? Is it the pressue inside the cylinder?

If you know of a good place me to learn about all this I would greatly appreciate it. Thanks.

-Pete
* Registered users of the site do not see these ads.
pehavens is offline   Reply With Quote
Old 05-29-2002, 06:52 PM   #2
MAD REX
Scooby Specialist
 
Member#: 18163
Join Date: Apr 2002
Location: Denver
Vehicle:
2002 2.5 WRX
MBP

Default

Do a search before you post




MPa Bar psi
0.01 0.1 1.45
0.02 0.2 2.9
0.03 0.3 4.35
0.04 0.4 5.8
0.05 0.5 7.25
0.06 0.6 8.7
0.07 0.7 10.15
0.08 0.8 11.6
0.09 0.9 13.05
0.10 1.0 14.5
0.11 1.1 15.95
0.12 1.2 17.4
0.13 1.3 18.85
0.14 1.4 20.3
0.15 1.5 21.75
MAD REX is offline   Reply With Quote
Old 05-29-2002, 07:13 PM   #3
pehavens
Scooby Newbie
 
Member#: 11821
Join Date: Oct 2001
Default thanks

Thanks for the numbers MAD REX. I did search several times but came up empty.

Anybody able to explain the spool up blip when out of gear or the negative numbers on the guage.

Thanks,

-Pete
pehavens is offline   Reply With Quote
Old 05-29-2002, 10:01 PM   #4
peczenij
Scooby Newbie
 
Member#: 16791
Join Date: Mar 2002
Location: Pennsylvania
Vehicle:
2004 WRX STi
WRBlue

Default

A boost gauge is actually a dual gauge.
The negative numbers are vacuum (suction) and the positive numbers are turbo boost (pressure).
A vacuum condition is caused by the throttle only being partially open, making the engine “suck” for air.
A normally aspirated engine (no turbo) will go from negative to zero vacuum at wide open throttle.
A turbo actually pressurizes the incoming air creating boost.
Most cars use the vacuum provided from the engine to provide power to accessories such as power brakes.
Enjoy…


.080=11.6 PSI
.085=12.3
.090=13.1
.095=13.8
.100=14.5
.105=15.2
.110=16.0
.115=16.7
.120=17.4
.125=18.1
.130=18.9
.135=19.6
.140=20.3
.145=21.0
.150=21.8
peczenij 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
question on driving WRX/ turbo cars Cata Vancouver Impreza Club Forum -- VIC 13 01-02-2005 04:26 AM
Max WHP on stock WRX turbo wRxbeater11 Proven Power Bragging 35 02-28-2004 01:48 AM
Max Boost & HP on Stock WRX Turbo noob Newbies & FAQs 4 12-21-2002 06:19 PM
Fastest Spool-Up on Stock WRX Turbo? WRacerX Factory 2.0L Turbo Powertrain 33 07-05-2002 06:38 PM
Question for those running stock WRX turbos on RS's STiTuner Normally Aspirated with bolt-on Forced Induction Powertrain 13 04-26-2002 08:43 PM


All times are GMT -4. The time now is 03:04 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.