Welcome to the North American Subaru Impreza Owners Club Saturday February 6, 2016
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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. 
Reply
 
Thread Tools Display Modes
Old 09-27-2003, 06:23 PM   #1
DRNWAGN
Scooby Specialist
 
Member#: 44255
Join Date: Sep 2003
Chapter/Region: MAIC
Location: G.Burg / NIH, MD
Vehicle:
10 Scion TC

Default STi Turbo size vs WRX-XT

I have heard that the WRX and XT have the same turbo. Is the turbo on the STI larger? If an upgrade is done, one would have to have some sort of ecu tuning done correct? Sorry, not new to the import tuning game but just to the turbo side of it!
Thanks
* Registered users of the site do not see these ads.
DRNWAGN is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-27-2003, 10:52 PM   #2
DRNWAGN
Scooby Specialist
 
Member#: 44255
Join Date: Sep 2003
Chapter/Region: MAIC
Location: G.Burg / NIH, MD
Vehicle:
10 Scion TC

Default

Where are the technical geeks on here? I would think that you guys could answer these basic questions but I can not seem to find them through the search. I know you guys know this stuff.
DRNWAGN is offline   Reply With Quote
Old 09-27-2003, 11:11 PM   #3
Wombat North
Scooby Specialist
 
Member#: 21267
Join Date: Jul 2002
Location: Eats, roots and then leaves
Vehicle:
STI, EWG 8cm Green
UTEC/ECUtek/WI & SD tune

Default

Yes TD04
Yes VF39
Depends how far you want to go. 250hp or 370hp using VF39.
Wombat North is offline   Reply With Quote
Old 09-27-2003, 11:19 PM   #4
DRNWAGN
Scooby Specialist
 
Member#: 44255
Join Date: Sep 2003
Chapter/Region: MAIC
Location: G.Burg / NIH, MD
Vehicle:
10 Scion TC

Default

eventually as far as I can since it would be such a sleeper. The trick will be finding someone that will do the ecu tuning since I have not found anything as of yet. But I am excited to say the least.
DRNWAGN is offline   Reply With Quote
Old 09-28-2003, 06:14 PM   #5
totoherbs
Scooby Guru
 
Member#: 7321
Join Date: Jun 2001
Chapter/Region: NESIC
Location: waltham, ma
Vehicle:
.... 122 IggPoints
Work... ahhh... so tired.

Default

hell... get a sti tubo, intercooler and ecu parts. Try to swap them and tell us how it works. The block is the same as the sti so you shouldnt have to many problems.
totoherbs is offline   Reply With Quote
Old 09-29-2003, 01:12 AM   #6
z
Scooby Specialist
 
Member#: 41762
Join Date: Aug 2003
Chapter/Region: International
Location: House of Pancakes
Vehicle:
04 STi
CT-DE-FL rinse+repeat

Default

Quote:
Originally posted by DRNWAGN
eventually as far as I can since it would be such a sleeper. The trick will be finding someone that will do the ecu tuning since I have not found anything as of yet. But I am excited to say the least.
try turboXS...they're in MD
http://turboxs.com/

they may be able to steer you in the right direction.
They don't have anything for the Forester XT right now, but maybe they can use your wagon as a "guinia pig" if the market is there for upgrades.
just a thought
z is offline   Reply With Quote
Old 09-29-2003, 08:57 AM   #7
DRNWAGN
Scooby Specialist
 
Member#: 44255
Join Date: Sep 2003
Chapter/Region: MAIC
Location: G.Burg / NIH, MD
Vehicle:
10 Scion TC

Default

I plan on getting by there in the near future. They are only about 10 miles from my house. I know exactly where they are. If they are willing to work with me I would be more than happy to have them use my car as a prototype. I need to check with them about BOV's anyway. Is anyone running a BOV on their XT's out there? Let me know what you guys have and how they are working out.
DRNWAGN is offline   Reply With Quote
Old 09-29-2003, 12:56 PM   #8
TypeC
Scooby Guru
 
Member#: 9794
Join Date: Aug 2001
Chapter/Region: TXIC
Location: Texas
Vehicle:
02 2.5LWRX-Retired
335i w/twins

Default

Quote:
Originally posted by totoherbs
The block is the same as the sti so you shouldnt have to many problems.
No it isn't. There was a thread that showed all the part numbers to be different. It's a EJ25, but not a EJ257.
TypeC is offline   Reply With Quote
Old 09-29-2003, 01:21 PM   #9
metoo
Scooby Guru
 
Member#: 4764
Join Date: Mar 2001
Chapter/Region: TXIC
Location: Houston
Vehicle:
2004 STi sold :(
forizzle

Default

Ever since they moved to Utah and stopped dealing APS stuff, you rarel hear their name any more, but Cobbtuning already has some stuff for the XT. I'm sure they will have Access for it soon too.
metoo is offline   Reply With Quote
Old 09-29-2003, 01:30 PM   #10
DRNWAGN
Scooby Specialist
 
Member#: 44255
Join Date: Sep 2003
Chapter/Region: MAIC
Location: G.Burg / NIH, MD
Vehicle:
10 Scion TC

Default

I will be going by Turbo XS this afternoon to have a bov installed since the wife is not familiar with the sounds just yet. In any case, I spoke with them on the phone and was told to bring the car by because they will need to make sure they have everything to fit the bov to the car. They also mentioned that they would be doing a Forester XT as a project car next and it would save them money if they did not have to buy one. So, I gave him my name and number and have to go by their this afternoon. He wants to check out a few things and see what works and does not. He will then check with his boss to see if he has set anything but is 98% sure that he has not. He has the authority to make the decision but does not want to stop on anyone's toes. If they use my car I will have to leave it with them a couple of days at a time but will get a tremendous discount on all the parts and not pay the labor for install or tuning of it. Keep your fingers crossed. Project sleeper might just get off the ground before we thought.
DRNWAGN is offline   Reply With Quote
Old 09-29-2003, 01:57 PM   #11
totoherbs
Scooby Guru
 
Member#: 7321
Join Date: Jun 2001
Chapter/Region: NESIC
Location: waltham, ma
Vehicle:
.... 122 IggPoints
Work... ahhh... so tired.

Default

Quote:
Originally posted by TypeC


No it isn't. There was a thread that showed all the part numbers to be different. It's a EJ25, but not a EJ257.
Realy.... I cant find it all I could find is...

Quote:
Originally posted by gvmelbrty

According to this "Forester XT technical description supplement" PDF posted on the Subaru Australia web site, the XT heads do have the sodium exhaust valves:

XT Cylinder Head Features
  • Four valves per cylinder in cross flow format with straight tumble airflow being achieved by manifold and intake port design.
  • Tumble Generator Valves (TGV) for good combustion efficiency and low emissions during cold start. After starting, the TGV immediately opens to maintain good airflow and performance.
  • Twin camshaft per cylinder head, with direct valve actuation and Active Valve Control System (AVCS) variable valve timing.
  • Camshaft weight has been reduced 1700g by using a hollow shaft and an assembly of sintered cam lobes.
  • Sodium filled exhaust valve stems for low inertia and improved heat dissipation.
  • Single timing belt with self-adjusting tensioner. (100,000 km replacement interval)
Lots of other interesting XT info in that doc as well.

-tom
http://forums.nasioc.com/forums/show...forester+block
They may have different part numbers, hell even the motor is called something else ej255 vs ej257, but its the same dam thing... the cams may be different tho. The sti cams are the same as deration as the wrx but they have higher lift and avcs gear, so the forester may have the same cams.

Last edited by totoherbs; 09-29-2003 at 02:08 PM.
totoherbs is offline   Reply With Quote
Old 09-29-2003, 02:04 PM   #12
gforced
Scooby Newbie
 
Member#: 38898
Join Date: Jun 2003
Chapter/Region: TXIC
Location: North Dallas
Default

The STi block is a semi-closed deck design which makes it stronger. The XT's block is an open deck design I believe.
gforced is offline   Reply With Quote
Old 09-29-2003, 02:09 PM   #13
totoherbs
Scooby Guru
 
Member#: 7321
Join Date: Jun 2001
Chapter/Region: NESIC
Location: waltham, ma
Vehicle:
.... 122 IggPoints
Work... ahhh... so tired.

Default

Quote:
Originally posted by gforced
The STi block is a semi-closed deck design which makes it stronger. The XT's block is an open deck design I believe.
read the subaru pdf link page 8
totoherbs is offline   Reply With Quote
Old 10-01-2003, 09:02 PM   #14
SuperRuWRX
Scooby Specialist
 
Member#: 4955
Join Date: Mar 2001
Chapter/Region: South East
Location: L5P's (Atlanta,GA)
Vehicle:
2004 FXT
OffRoadSubarus.com

Default ??????????

"The STi block is a semi-closed deck design which makes it stronger. The XT's block is an open deck design I believe."

Are you sure ??????

I think not. Richard
SuperRuWRX is offline   Reply With Quote
Old 10-01-2003, 10:52 PM   #15
blinguskahn
Scooby Specialist
 
Member#: 39301
Join Date: Jul 2003
Chapter/Region: BAIC
Location: The Haystack
Vehicle:
STi 05 8cm FPRed
WRX 06 Blue FP20G

Default

Quote:
Originally posted by TypeC


No it isn't. There was a thread that showed all the part numbers to be different. It's a EJ25, but not a EJ257.
Wrong. EJ255 (as stated in my manual).
blinguskahn is offline   Reply With Quote
Old 10-02-2003, 12:21 PM   #16
TypeC
Scooby Guru
 
Member#: 9794
Join Date: Aug 2001
Chapter/Region: TXIC
Location: Texas
Vehicle:
02 2.5LWRX-Retired
335i w/twins

Default

Quote:
Originally posted by blinguskahn


Wrong. EJ255 (as stated in my manual).
Duh, of course it's an EJ255, the point was it wasn't an EJ257. They are ALL EJ25's.

Noob.
TypeC is offline   Reply With Quote
Old 10-02-2003, 12:26 PM   #17
blinguskahn
Scooby Specialist
 
Member#: 39301
Join Date: Jul 2003
Chapter/Region: BAIC
Location: The Haystack
Vehicle:
STi 05 8cm FPRed
WRX 06 Blue FP20G

Default

Noob? What does that mean? I have never seen that word before on these boards. That an original?

Douchebag.
blinguskahn is offline   Reply With Quote
Old 10-02-2003, 02:33 PM   #18
totoherbs
Scooby Guru
 
Member#: 7321
Join Date: Jun 2001
Chapter/Region: NESIC
Location: waltham, ma
Vehicle:
.... 122 IggPoints
Work... ahhh... so tired.

Default

Quote:
Originally posted by TypeC


Duh, of course it's an EJ255, the point was it wasn't an EJ257. They are ALL EJ25's.

Noob.

But... you were wrong so there is no point in a pissing contest...
totoherbs 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
STi turbo upgrade vs. wrx 06+ turbo upgrade hockeygm General Community 5 03-27-2007 09:55 PM
Turbo RS vs WRX wrx_n_effects Normally Aspirated with bolt-on Forced Induction Powertrain 47 04-19-2002 08:10 PM
Turbo RS vs. WRX imprezive General Forum Archive 26 03-22-2001 07:33 PM

All times are GMT -4. The time now is 04:07 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2016 Axivo Inc.
Copyright ©1999 - 2016, North American Subaru Impreza Owners Club, Inc.