Welcome to the North American Subaru Impreza Owners Club Sunday April 20, 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 > Normally Aspirated 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 01-01-2003, 06:55 PM   #1
Hawk296
Scooby Specialist
 
Member#: 14555
Join Date: Jan 2002
Chapter/Region: MWSOC
Location: Troy, MI
Vehicle:
1995 Impreza L
Baja

Default EJ25D vs. EJ253??

What are the differences in all of the EJ25 engine codes? also, Does anyone know if there is a difference in the ring around the crankshaft timing gear sprocket that the crank position sensor reads between a 2.5L and a 1.8L?? I am trying to run a 2.5 off a 1.8 ECU for awhile and need to know if I have to retain the 1.8 ring. I know the 2.5 has one with 15 teeth followed by a flat spot followed by 12 teeth then 2 more flat spots. I dont remember the 1.8 being like this but i cant remember too well. If someone has access to this info it would be a big help. thanks a ton for your help.
* Registered users of the site do not see these ads.
Hawk296 is offline   Reply With Quote
Old 01-01-2003, 07:04 PM   #2
outback2.5HO
Scooby Specialist
 
Member#: 15135
Join Date: Feb 2002
Chapter/Region: NWIC
Location: Bend, Or. USA
Vehicle:
95 GF WRX
Black

Default

Is your 1.8 ECU OBD II (96 and newer) or later? Curious to see how that would work.

Not sure on the tooth count, but I think the cam/crank angle sensors and plugs are different between the two.
outback2.5HO is offline   Reply With Quote
Old 01-01-2003, 07:13 PM   #3
Hawk296
Scooby Specialist
 
Member#: 14555
Join Date: Jan 2002
Chapter/Region: MWSOC
Location: Troy, MI
Vehicle:
1995 Impreza L
Baja

Default

my 1.8 is OBD I. I know the swap has been done on OBDII cars. It is a 95'. I have a few spare 2.5L wiring harnesses that are donating their electrical connectors for injectors ect. and ill probably just use my 1.8s temp sensor. I just dont know about the tooth count between the two. anyone know??
Hawk296 is offline   Reply With Quote
Old 01-01-2003, 07:21 PM   #4
outback2.5HO
Scooby Specialist
 
Member#: 15135
Join Date: Feb 2002
Chapter/Region: NWIC
Location: Bend, Or. USA
Vehicle:
95 GF WRX
Black

Default

The tooth count shouldn't matter, if the crank and cam angle sensors/connectors are from the 2.5. Is that a DOHC or SOHC that you are swapping in?
outback2.5HO is offline   Reply With Quote
Old 01-01-2003, 08:59 PM   #5
Hawk296
Scooby Specialist
 
Member#: 14555
Join Date: Jan 2002
Chapter/Region: MWSOC
Location: Troy, MI
Vehicle:
1995 Impreza L
Baja

Default

It is a SOHC engine. My thinking was that ide use the 2.5 crank and cam sensors with whatever electrical connectors are needed. I thought that if the tooth count was different, even though the proper sensor is reading it, the ECU would not unterperet it properly.
Hawk296 is offline   Reply With Quote
Old 01-01-2003, 09:01 PM   #6
rhdude
Scooby Guru
 
Member#: 6637
Join Date: May 2001
Chapter/Region: MAIC
Location: Manassas
Vehicle:
2009 Acura MDX Sport

Default

what engine management are you running to handle the Fuel delievery?
rhdude is offline   Reply With Quote
Old 01-02-2003, 03:58 AM   #7
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

the 2.5 crank trigger has 6 teeth, at least on phase 2 blocks, i think phase 1's had 6 teeth as well but i am not certain. You can not change the crank sensor without some type of ecu. You need to retain the factory trigger wheels.

Jeremy
HndaTch627 is offline   Reply With Quote
Old 01-02-2003, 11:46 PM   #8
Hawk296
Scooby Specialist
 
Member#: 14555
Join Date: Jan 2002
Chapter/Region: MWSOC
Location: Troy, MI
Vehicle:
1995 Impreza L
Baja

Default

ok thanks for all of the help. EJ18 EJ22 Ej25 through 98 have same crank trigger. 99 has a differnt part number which supercedes all the others. I found out my engine was intended for a 2000 legacy manual trans. meaning it has the sprocket i described above which will NOT work on the older ECUs. The 2000 automatics have yet a different one which has 6 teeth. This is for the different ECUs/timing between the automatic engines and manual. I ordered the one for a 99 which I will put on and will be read by my 1.8L crank sensor and ECU just fine. hopefully that is the only problem besides switching other sensors/connectors.
Hawk296 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
EJ25D vs EJ252 vs EJ253 Chi_San Normally Aspirated Powertrain 35 11-27-2012 07:15 PM
Visteon Radiator-Throttle Bodies (EJ20G/EJ25D/etc.)-EJ20G+EJ25D Intake Manifold-ETC! Audioexcels Engine/Power/Exhaust 24 07-22-2010 09:23 AM
Visteon Radiator-Throttle Bodies (EJ20G/EJ25D/etc.)-EJ20G+EJ25D Intake Manifold-ETC! Audioexcels NWIC Private Classifieds 23 07-22-2010 09:22 AM
EJ251 vs EJ253 qtr_wrx Normally Aspirated Powertrain 10 11-24-2008 11:00 AM
ej25d or ej253 block? illegal2.2 Normally Aspirated with bolt-on Forced Induction Powertrain 0 03-30-2007 01:08 AM


All times are GMT -4. The time now is 04:14 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.