Welcome to the North American Subaru Impreza Owners Club Thursday October 2, 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 10-04-2012, 11:42 PM   #1
rolzrex
Scooby Specialist
 
Member#: 85790
Join Date: Apr 2005
Chapter/Region: RMIC
Location: Fairfield, Pa.
Vehicle:
11 STi
pbp

Default 05 STi compression test numbers, should I bother with a leakdown?

Hey guys,
So ive been having a strange issue where my 05 sti doesnt always engine brake while decellerating. IAG said that among other possibilities, it could be a low compression problem, which prompted me to get a comp. tester and find out. Here were my numbers:
(cold engine, about 500ft elevation, all plugs removed, WOT, ingition fuse pulled)
124,125,125,124
Im very happy with the consistency, however these numbers seem a bit on the low side. I know with the engine warmed up the #'s might be higher, but my question is should I be concerned? And do you think its worth performing a leakdown test?
thanks,
Nate
* Registered users of the site do not see these ads.

Last edited by rolzrex; 10-05-2012 at 12:30 PM.
rolzrex is offline   Reply With Quote
Old 10-05-2012, 12:01 AM   #2
wayoutwest
Scooby Specialist
 
Member#: 14379
Join Date: Jan 2002
Chapter/Region: SCIC
Location: www.greenroom.net
Vehicle:
2007 Acura
gray

Default

If these were cold numbers i wouldn't be alarmed. The consistency is more important. What say everyone else?

cheers,
dave
wayoutwest is offline   Reply With Quote
Old 10-05-2012, 12:42 AM   #3
STIBungy
Scooby Specialist
 
Member#: 51684
Join Date: Jan 2004
Location: CO
Default

You're at 4330 ft alt. Your compression numbers will be lower than someone who's at sea level. When I did a comp test on mine, I was at 115 across the board. I'm about 1000 higher in elevation than you.
STIBungy is offline   Reply With Quote
Old 10-05-2012, 09:22 AM   #4
rolzrex
Scooby Specialist
 
Member#: 85790
Join Date: Apr 2005
Chapter/Region: RMIC
Location: Fairfield, Pa.
Vehicle:
11 STi
pbp

Default

oh sorry stibungy I guess I need to update my info haha. I dont live in utah anymore im in pennsylvania now, near gettysburg.
rolzrex 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 01:17 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.