Welcome to the North American Subaru Impreza Owners Club Thursday July 10, 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 > Subaru Conversions

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 01-20-2011, 01:08 AM   #1
IGotMeThis
Scooby Newbie
 
Member#: 240098
Join Date: Mar 2010
Chapter/Region: Tri-State
Vehicle:
1999 Boosted Legacy
Silver

Default Ej20K/G into 1999 subaru legacy gt help

I have a 99 subaru legacy that i will be installing a ej20k/g short block into with the stock ecu from the legacy ran on a emanage ultimate. the question i have is if the TDC sensor on the ej20k/g is the same as the ej25d previously in the car. Or if i can switch sensors from the ej25d to the ej20 to make it work. The motor setup will be ej20 shortblock with basicly ej25d surrounding

The reason for this is im saving up for a built ej257 but untill then i was thinking about just throwing this shortblock in with phase one NA dohc heads and with a little boost since it would cost me change compared to the motor i am saving up for and it will be a quick way to get it onto the road. I know if the computer doesnt see any changes itll run fine maybe a little rich due to the smaller displacment but im okay with this.
* Registered users of the site do not see these ads.
IGotMeThis is offline   Reply With Quote
Old 01-20-2011, 02:41 AM   #2
kcpaz
Scooby Newbie
 
Member#: 194611
Join Date: Nov 2008
Location: Gilbert Arizona
Vehicle:
1998 Legacy GT
Mexico Blue (not red)

Default

Huh? Why?
kcpaz is offline   Reply With Quote
Old 01-20-2011, 03:11 AM   #3
IGotMeThis
Scooby Newbie
 
Member#: 240098
Join Date: Mar 2010
Chapter/Region: Tri-State
Vehicle:
1999 Boosted Legacy
Silver

Default

Quote:
Originally Posted by kcpaz
Huh? Why?
Because I can get a ej20k/g motor for 500 vs the 6k I'm saving for my ej257 build
IGotMeThis is offline   Reply With Quote
Old 01-20-2011, 10:03 AM   #4
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 Imp W/EJ20K
flat black

Default

tdc? you mean crank sensor?

big question is not the crank sensor but the cam sensor

this project is a bad idea ...
Jaxx is offline   Reply With Quote
Old 01-20-2011, 12:15 PM   #5
IGotMeThis
Scooby Newbie
 
Member#: 240098
Join Date: Mar 2010
Chapter/Region: Tri-State
Vehicle:
1999 Boosted Legacy
Silver

Default

Quote:
Originally Posted by Jaxx View Post
tdc? you mean crank sensor?

big question is not the crank sensor but the cam sensor

this project is a bad idea ...
Well the cam sensor is on the ej25d head which is stock for the motor ... the crank sensor is probably the same due to the ej engine class but if the crank sensor is the same then the ecu wont notice the change and run the motor like it was a stock motor and my e manage will pick up the wot and control boost .. what i need to know is if i bolt the motor up will number 1 cycle fire
IGotMeThis is offline   Reply With Quote
Old 01-20-2011, 03:55 PM   #6
69subaru360
Scooby Guru
 
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

If your legacy is a sohc phase 2 2.2 it won't work, if it's a dohc phase 1 2.5 it will work.
69subaru360 is online now   Reply With Quote
Old 01-21-2011, 04:05 AM   #7
IGotMeThis
Scooby Newbie
 
Member#: 240098
Join Date: Mar 2010
Chapter/Region: Tri-State
Vehicle:
1999 Boosted Legacy
Silver

Default

Quote:
Originally Posted by 69subaru360 View Post
If your legacy is a sohc phase 2 2.2 it won't work, if it's a dohc phase 1 2.5 it will work.
OKay ill try it ill get back ... i dont know if ej25d heads will fit onto the ej20 their is a 6 mm difference and i do not know if ill be in the combustion champer with that

Edit: quick question why wont phase 2 ej25d heads run on the ej20?

Actually with me reading it looks like the ej25d heads r phase 1 since it isnt sohc?

Last edited by IGotMeThis; 01-21-2011 at 05:10 AM. Reason: question
IGotMeThis is offline   Reply With Quote
Old 01-22-2011, 03:20 PM   #8
kheff46
Scooby Specialist
 
Member#: 66739
Join Date: Jul 2004
Chapter/Region: MWSOC
Location: Medina, Ohio
Vehicle:
2002 WRX wagon
silver

Default

your c/r will be low enough to run boost with a stock HG thickness since your adding volume with a 2.5 head on 2.0 block. a thicker gasket will lower c/r even more(for fun since its cheap build before your BUILD!) for boost.

edit: im not sure your HG will seal properly with that big a difference in bore sizes! i gotta go outside and check now if the 2.5 heads match the 2.0's. it's 0* outside too. poop.

sensors should be same. a K is most similar to a phase 1 2.5 electronically, and physically, and would be easiest. im building the a phase 1 2.5 cheaply and running it off a V4 JDM STi harness in a 95L sedan. it recognizes what you need. 180* crank sensor=180* crank sensor. im going backwards from your point of view, but found the info mechanically whilst swapping the K into the L chassis originally.

hope this helps!

--keith
kheff46 is offline   Reply With Quote
Old 01-23-2011, 04:43 AM   #9
RallyColtTurbo
Scooby Specialist
 
Member#: 16819
Join Date: Mar 2002
Chapter/Region: SCIC
Location: Lake Elsinore, CA
Vehicle:
2002 MBP WRX,'06 LR3
Three Gen 1 Legacy Turbos

Default

Your '99 EJ25D heads are the same basic castings as the non-STI EJ20Ks.

The sensors are the same. Right down to the part numbers and cam gears.

The chambers and valves *should* be very close to the same. I *can* say that the '98 Impreza 2.5RS EJ25D chambers and valves are the same as '97/'98 non-STI EJ20K WRX heads. The '99 Legacy EJ25D heads are the same as the '98 Impreza as far as I have read.

The ports are slightly smaller on the EJ25D vs. the EJ20K.

EJ25D heads have the casting marks/spots for the turbo oil and water but left in an unmachined state. They need to be drilled and tapped and the proper fittings added.
RallyColtTurbo is offline   Reply With Quote
Old 01-24-2011, 11:19 PM   #10
IGotMeThis
Scooby Newbie
 
Member#: 240098
Join Date: Mar 2010
Chapter/Region: Tri-State
Vehicle:
1999 Boosted Legacy
Silver

Default

Quote:
Originally Posted by RallyColtTurbo View Post
Your '99 EJ25D heads are the same basic castings as the non-STI EJ20Ks.

The sensors are the same. Right down to the part numbers and cam gears.

The chambers and valves *should* be very close to the same. I *can* say that the '98 Impreza 2.5RS EJ25D chambers and valves are the same as '97/'98 non-STI EJ20K WRX heads. The '99 Legacy EJ25D heads are the same as the '98 Impreza as far as I have read.

The ports are slightly smaller on the EJ25D vs. the EJ20K.

EJ25D heads have the casting marks/spots for the turbo oil and water but left in an unmachined state. They need to be drilled and tapped and the proper fittings added.
Your a God ... thank you ill post up how this build goes
IGotMeThis is offline   Reply With Quote
Old 01-25-2011, 12:03 PM   #11
kheff46
Scooby Specialist
 
Member#: 66739
Join Date: Jul 2004
Chapter/Region: MWSOC
Location: Medina, Ohio
Vehicle:
2002 WRX wagon
silver

Default

this info is out there, and has been. it's just knowing how to search effectively thru the garbage bins of threads that have the keyword in it once!

rallycoltturbo is dead on. identical castings, STi's just got more love from the factory! parts are 100% interchangeable between the DOHC LGT/RS/forester/etc.

--keith
kheff46 is offline   Reply With Quote
Old 01-27-2011, 06:58 AM   #12
IGotMeThis
Scooby Newbie
 
Member#: 240098
Join Date: Mar 2010
Chapter/Region: Tri-State
Vehicle:
1999 Boosted Legacy
Silver

Default

Thank you like I don't want to be that Guy posting about some thing already discussed but I have seriously looked for about 2 weeks and pictures forums and heard from word of mouth and I've got more yes then no but this one Guy told me it wouldn't fit and the build wouldn't work and that was stuck in my head so I.posted a forum asking and thank you guys for your help
IGotMeThis 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
FS: 1999 Subaru Legacy GT-WRX LTD WRBWRXWAG Canada Region Private Classifieds 6 04-02-2008 04:29 PM
1999 Subaru Legacy GT 2.5 Limited snwonaes99 Private Vehicle 'For Sale' Classifieds 16 04-19-2007 11:15 PM
1999 Subaru Legacy GT Wagon nolanslv Private Vehicle 'For Sale' Classifieds 0 12-10-2004 02:12 AM
FS: 1999 Subaru Legacy GT Turbo (/w EJ25) method New England Impreza Club Forum -- NESIC 9 08-03-2004 09:18 PM
1999 Subaru Legacy GT for Sale cnair Private Vehicle 'For Sale' Classifieds 3 04-26-2004 04:30 PM


All times are GMT -4. The time now is 07:24 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.