Welcome to the North American Subaru Impreza Owners Club Wednesday November 22, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

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 03-11-2011, 01:34 PM   #1
Scooby Newbie
Member#: 181009
Join Date: May 2008
Chapter/Region: NWIC
Location: Gig Harbor, WA
`12 MZ3 Skyactiv
'12 C300 4matic Sport

Default Ringland failures with ELH?

I've read on a few forums that a possible cause for ringland failures on cyl's 2 and 4 is due to higher EGT's with the stock unequal length manifold.

If this is true, has anyone running an equal length header had ringlands crack?
* Registered users of the site do not see these ads.
TRSCobra is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 03-11-2011, 02:16 PM   #2
the suicidal eggroll
Scooby Guru
Member#: 51961
Join Date: Jan 2004
Chapter/Region: RMIC
Location: Broomfield, CO
2005 STi
2012 WRX


Originally Posted by TRSCobra View Post
has anyone running an equal length header had ringlands crack?
#3 is a common one to crack too.

People have tried to blame the excessive #4 failures on everything imaginable. What comes to mind is:
#4 has longer exhaust manifold runners which leads to higher EGTs
#4 receives fuel later in the path (fuel gets to other cylinders first so the pressure has dropped by the time it gets to #4)
The intake manifold flows more air to #4 so it runs consistently leaner
The factory ECU runs more timing on #4 than the others so it will be the first to knock and trigger the ECU to pull timing (the ECU can hear knock better on #4 than the others because that's where the knock sensor is)

Last edited by the suicidal eggroll; 03-11-2011 at 02:28 PM.
the suicidal eggroll is offline   Reply With Quote
Old 03-11-2011, 03:07 PM   #3
Scooby Specialist
Member#: 271525
Join Date: Jan 2011
Location: BagEnd
7/2 STi/WRX wagon


Well-tuned cars live longer no matter what the mods.
A-man07 is offline   Reply With Quote
Old 03-11-2011, 03:10 PM   #4
Scooby Guru
Member#: 170602
Join Date: Jan 2008
Location: j-ville fl
06 Wrx RWD Auto


^true so true.
stretchedk7 is offline   Reply With Quote
Old 03-11-2011, 06:32 PM   #5
Scooby Specialist
Member#: 75129
Join Date: Nov 2004
Chapter/Region: MWSOC
Location: Marquette,mi area
09 WRX stg 2+
Lost the boxer rumble


I think EL header is a step in the right direction, Nothing other then a good tune can prevent that.
boost4life 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
And I Thought Ringland Failures were for the 2.5 motors... dux10 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 4 02-18-2011 04:32 PM
Ringland discussion with SUBARU UK on facebook motec 88 General Community 3 09-02-2010 04:56 AM
School me on ringland failure...preventive measures? JDMFLCL Newbies & FAQs 12 06-18-2009 10:33 PM
MAF failure with JC intake.......... Mprezive Normally Aspirated Powertrain 19 03-08-2001 12:02 AM

All times are GMT -4. The time now is 12:52 AM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.