Welcome to the North American Subaru Impreza Owners Club Sunday August 30, 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 > Open Source Reflashes

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 02-03-2015, 03:47 PM   #1
rocklizzard91
Scooby Newbie
 
Member#: 226287
Join Date: Oct 2009
Location: Fairfield CA
Vehicle:
2002 WRX
WRB

Default Ej205 egt concerns

Hey all, I've had my egt gauge for a while, it's probe is installed in the driver side manifold on the "button" that is regularly suggested. I'm not sure if my egt's are safe. My IAM is usually at 16 when I check. But I wanted to see what you guys think.

I've got a 2002 WRX with the stock td04 and an external wastegate, Perrin inlet, 3port ebcs, catless 3" downpipe, iirc 2.5" exhaust to a Prodrive axleback, XPT tune that I have modified the ignition table from a friend's protune map, STi tmic, 6speed swap and the car runs ~19psi
Live in CA with 91oct

The egt's are as follows
70mph ~2800rpm egt1435 ignition advance ~39
55mph ~2200rpm egt1330 ignition advance ~36
Idling I get 730rpm 970 ignition advance ~12

Does this seem normal? When I get on it they can get as high as mid 1700's and low 1800's if it's in 5th or 6th gear. Afr doesn't go above 11.2 while boosting, it's a little on the lean side, but the IAM has stayed at 16 suggesting no knock.

Just looking for input. I'll be swapping to a Blouch 16g next week and I'm not sure where I should be.

Sent from my HTC6435LVW using NASIOC mobile app
* Registered users of the site do not see these ads.
rocklizzard91 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-05-2015, 02:30 AM   #2
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Default

11.2 at high RPM on an EJ205 on CA91 is on the lean side. EGTs are up there. CA91 needs to retard some timing, which increases EGTs. Richer fueling will calm that down. I usually aim for 10.8-10.9 on local tunes.

Knock isn't the concern here, it's longevity of the turbo and exhaust valves. Turbos sometimes have turbine inlet specifications, which I assume is why the stock EGT is located right next to the turbine inlet. Generally this spec is 1650-1700, which is where the "rule of thumb" of <1650 is good comes from. I think you'll find quite a few CA91 tunes where EGTs are over 1650. It doesn't result in immediate failure, or even immediate damage like knock can, but it's more a margin thing.

Personally, I would richen the WOT fueling tables and drop the EGTs some. The only concern is WOT. Cruising EGTs at 1400 ish... whatever, nothing really matters there.
Concillian is offline   Reply With Quote
Old 02-05-2015, 06:22 AM   #3
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

^^^what he said
ride5000 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 06:22 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.