Welcome to the North American Subaru Impreza Owners Club Thursday August 28, 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 with bolt-on Forced Induction 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 08-13-2010, 07:17 PM   #1
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default 97-98 EJ22 n/a with EJ22T pistons/cams

has anyone ever succesfully fit EJ22T factory pistons or cams to a 97-98 EJ22 n/a engine?
Does the newer piston pin and diameter changes cause problems? Also will turbo cams work with the roller rockers?
* Registered users of the site do not see these ads.
drumzzzzz is offline   Reply With Quote
Old 08-13-2010, 08:43 PM   #2
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

That's a lot of labor to drop the compression ratio. Are you still using the stock 2.2l heads?

If so, that's your real problem. Get some DOHC Ej25 heads and both your problems go away at once. You get 8.6:1 compression and heads that flow like the wind. It's a much better approach with much better results.
Matt Monson is offline   Reply With Quote
Old 08-13-2010, 09:00 PM   #3
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default

I was reading about the DOHC head swap, however some said that things don't line up quite right (gaskets, combustion chamber ect ..) Would it be easier to just swap an EJ20 before that?

It seems the N/A EJ22 boosters like the later SOHC heads for the larger valves and roller rockers, and the engine would be getting a full teardown/rebuild anyways for a piston swap.
drumzzzzz is offline   Reply With Quote
Old 08-13-2010, 09:16 PM   #4
turbo01gc8
Scooby Newbie
 
Member#: 217973
Join Date: Jul 2009
Location: northern tier, PA
Vehicle:
2001 turbo impreza L
acadia green

Default

trying to find out same with 01 2.2L. do they fit? also heard that sohc is the way to go
turbo01gc8 is offline   Reply With Quote
Old 08-13-2010, 09:47 PM   #5
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

There's theoretical and then there's practical. Those talking theory go on about quench area and coolant passages in the head gasket, etc. etc. Practical people build the engine and sees if it overheats or has detonation issues from those theoretical ideas.

What I am getting at is I am not someone who just passes on things I don't know to work from firsthand experience and exposure. I've built this engine and run it. A local friend built this engine on his '01 OBS and ran it around close to 1 bar of boost from a turbo the size of an 18G for close to 50k mile before he blew it up on purpose. He wanted to see the limit, so he took it to the drag strip and kept turning the boost up in 1psi increments until he broke something.

If you want to use SOHC Ej25 heads, go for it. They flow great as well. The DOHC heads are so nice because they can so easily be converted to cool and oil the turbo. It's a bit more work on the SOHC but they will work well too. It's up to you, but for someone with a Phase I engine and electronics I would suggest the DOHC and for someone with the Phase II engine and electronics I would go SOHC. It's easier to set up and run with a piggyback on the stock ECU that way.
Matt Monson is offline   Reply With Quote
Old 08-13-2010, 11:27 PM   #6
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default

Which gasket do you use for the swap? It does sound like a far easier way to reduce compression, and still run N/A cams, not to mention a 97/98 DOHC ecu is basically plug in play.

Last edited by drumzzzzz; 08-13-2010 at 11:46 PM.
drumzzzzz is offline   Reply With Quote
Old 08-14-2010, 09:09 AM   #7
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

I use the gasket for the block. So phase I Ej22, thick phase I ej22 gasket. For phase II ej22, use thin phase II ej22 gasket.
Matt Monson is offline   Reply With Quote
Old 08-16-2010, 12:41 AM   #8
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default

appreciate all the info, it's helping narrow down the turbo build options.
drumzzzzz is offline   Reply With Quote
Old 08-16-2010, 12:07 PM   #9
turbo01gc8
Scooby Newbie
 
Member#: 217973
Join Date: Jul 2009
Location: northern tier, PA
Vehicle:
2001 turbo impreza L
acadia green

Default

so if we use 2.2 block with 2.5sohc, which timing belt do we need? which years are phase1 and 2?
turbo01gc8 is offline   Reply With Quote
Old 08-16-2010, 03:51 PM   #10
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

Timing belt always matches the heads.
Matt Monson is offline   Reply With Quote
Old 08-16-2010, 05:30 PM   #11
rsfc3s
Scooby Newbie
 
Member#: 253967
Join Date: Aug 2010
Vehicle:
99 impreza
silver

Default

i have the ej22t pistons, rods, and cams if you need them! I have the complete motor and wiring if you need any extra stuff. Good luck with the build.

Last edited by rsfc3s; 08-16-2010 at 07:49 PM.
rsfc3s is offline   Reply With Quote
Old 08-16-2010, 07:20 PM   #12
thorne
Scooby Newbie
 
Member#: 130063
Join Date: Oct 2006
Location: Ohio
Vehicle:
2003 WRX
Silb

Default

I'm thinking about doing STi Rods + EJ22t Pistons in my next build.
thorne is offline   Reply With Quote
Old 08-21-2010, 01:58 AM   #13
cgannon
Scooby Newbie
 
Member#: 255486
Join Date: Aug 2010
Chapter/Region: MWSOC
Location: Devils Lake, North Dakota
Vehicle:
2002 WRX
Silver

Default

k, so i dont have enough posts in order to start a thread to ask this, but i have a 97 impreza, 2.2. and i'd like to turbo it, but dont have the slightest idea where to start. i know u need to lower the compression, but the engine has 228k ... soo where do i start guys? 16 yrs old, not making a lot of money, 2-3 grand tops. goal is 220+ hp. please, anything is better than the nothing that i have now.
cgannon is offline   Reply With Quote
Old 08-21-2010, 10:58 PM   #14
ballitch
Scooby Specialist
 
Member#: 74907
Join Date: Nov 2004
Chapter/Region: NWIC
Location: salem, OR
Vehicle:
98 cam'd EJ251
Wrx Tranny,slowr than ish

Default

Re-read post #2. If you dont want to spend alot of money, buy a set of either DOHC or SOHC EJ25 heads. They usually fetch about $250-$350 a pair, depending on condition. I would replace the valve stem seals, cam seals, and maybe lap the valves if you feel like it.

Grab a set of EJ22E headgaskets, a rear main seal and front crank seal along with a Haynes manual for your car, follow the directions to bolt the heads onto your block. Install motor and be happy, look for stock turbo parts from wrx's upgrading. Your going to need engine management, injectors, turbo engine crossmember(or cut yours and reinforce it). This is not everything you will need, just stuff off the top of my head.

Do alot of searching on the subject to get a feel if you really want to do this or not.



~Josh~
ballitch is offline   Reply With Quote
Old 08-22-2010, 11:32 PM   #15
cgannon
Scooby Newbie
 
Member#: 255486
Join Date: Aug 2010
Chapter/Region: MWSOC
Location: Devils Lake, North Dakota
Vehicle:
2002 WRX
Silver

Default

Thanks so much! next noobie question.. where can i get these parts? and if any1 else can think of anything else i'll need to do this, please let me know. its an "open deck" apparently, some say this is a bad idea, others say it doesnt matter open or closed.. i think i'm gonna go for it and see what happens, moneys made for spending right? haha
cgannon is offline   Reply With Quote
Old 08-23-2010, 12:15 AM   #16
ballitch
Scooby Specialist
 
Member#: 74907
Join Date: Nov 2004
Chapter/Region: NWIC
Location: salem, OR
Vehicle:
98 cam'd EJ251
Wrx Tranny,slowr than ish

Default

The for sale forum is a good place to start, also Ebay.

As far as the open deck issue, it's fine to boost it. As long as the tune is good, it should take a decent amount of power before it pops. If it does take a crap on you, buy another one out of a junkyard for $100 and rebuild it.



~Josh~
ballitch is offline   Reply With Quote
Old 08-24-2010, 07:20 PM   #17
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

Get to know the locals by hanging out in your regional forum and checking the classifieds there.

And when you hit the junkyards look for 91-94 Legacy turbos. They are a great source for conversion take off parts. You might even score an Ej22T closed deck block that the junkyard doesn't know is special. I paid $100 for my first Ej22T longblock. I was so excited when I found it in that car and asked what they wanted for it. Their system made no distinction between turbo and non-turbo longblocks and since all the turbo stuff was gone they didn't even know it was a turbo. I got the engine for $100 and the crossmember for another $25.
Matt Monson is offline   Reply With Quote
Old 06-04-2012, 02:08 PM   #18
Joshsmiley55
Scooby Newbie
 
Member#: 297223
Join Date: Oct 2011
Location: Copperopolis ca
Vehicle:
95 Impreza Coupe
Green

Default

would the compression from an 97 ej22 with ej22t pistons work with a set of sohc 2.5 99 rs heads? i canr figure out the compression for the ej22 with ej22t pistons.
so i can only do one thing. either the ej22t pistons or either the 2.5rs heads.
im doing a turbo setup with just a td04.
i really want the ej22t pistons and rods because they are forged, but if i go with the 2.5rs heads i can push more psi because better flow.
also i port and polish all of my own heads so im pretty sure that effects compression as well.
if anyone can pm me and point me in the right direction that would be amazing!
Joshsmiley55 is offline   Reply With Quote
Old 06-04-2012, 07:54 PM   #19
69subaru360
Scooby Guru
 
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

Quote:
Originally Posted by Joshsmiley55 View Post
would the compression from an 97 ej22 with ej22t pistons work with a set of sohc 2.5 99 rs heads? i canr figure out the compression for the ej22 with ej22t pistons.
so i can only do one thing. either the ej22t pistons or either the 2.5rs heads.
im doing a turbo setup with just a td04.
i really want the ej22t pistons and rods because they are forged, but if i go with the 2.5rs heads i can push more psi because better flow.
also i port and polish all of my own heads so im pretty sure that effects compression as well.
if anyone can pm me and point me in the right direction that would be amazing!

EJ22T pistons are cast not forged and EJ22T rods are the same as any other EJ engine except the newer STI.

You'd be wasting your time with them.
69subaru360 is offline   Reply With Quote
Old 06-04-2012, 11:31 PM   #20
Joshsmiley55
Scooby Newbie
 
Member#: 297223
Join Date: Oct 2011
Location: Copperopolis ca
Vehicle:
95 Impreza Coupe
Green

Default

ok thats why you post stuff on forums! thank you! i hate false information =/

dont the ej22t pistons put out a lower compression ratio?
Joshsmiley55 is offline   Reply With Quote
Old 06-05-2012, 08:35 AM   #21
69subaru360
Scooby Guru
 
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

Quote:
Originally Posted by Joshsmiley55 View Post
ok thats why you post stuff on forums! thank you! i hate false information =/

dont the ej22t pistons put out a lower compression ratio?
Yeah too low, like 7.5:1
69subaru360 is offline   Reply With Quote
Old 06-07-2012, 12:26 AM   #22
ballitch
Scooby Specialist
 
Member#: 74907
Join Date: Nov 2004
Chapter/Region: NWIC
Location: salem, OR
Vehicle:
98 cam'd EJ251
Wrx Tranny,slowr than ish

Default

Stock EJ22T CR is 8.0:1 Which is exactly what you would get if you swapped EJ22T pistons into your block, since the heads have the same chamber volume, and the crank and rods are the same.

AFAIK, no Subaru has ever came from the factory with forged pistons...AFAIK, all Subaru cranks are forged.

If I were you, I would do what Monson said, "if phase 1, use DOHC EJ25 heads, if phase II, use SOHC EJ25 heads."

You have a phase 1, BTW.


~Josh~
ballitch is offline   Reply With Quote
Old 06-07-2012, 01:57 AM   #23
69subaru360
Scooby Guru
 
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

Quote:
Originally Posted by ballitch View Post
AFAIK, no Subaru has ever came from the factory with forged pistons
A few of the older jdm stis did. V7 and a select few GC ones like some of the RAs.
69subaru360 is offline   Reply With Quote
Old 06-08-2012, 12:03 AM   #24
ballitch
Scooby Specialist
 
Member#: 74907
Join Date: Nov 2004
Chapter/Region: NWIC
Location: salem, OR
Vehicle:
98 cam'd EJ251
Wrx Tranny,slowr than ish

Default

Good to know, thanks.


~Josh~
ballitch is offline   Reply With Quote
Old 10-31-2012, 09:21 AM   #25
97ej22e
Scooby Newbie
 
Member#: 327710
Join Date: Jul 2012
Chapter/Region: NESIC
Location: Sanford, Maine
Vehicle:
1999 Impreza OBS
Green

Default

I've been in the process of building what some of you are talking about. I have an ej22e short block and I am putting on ej25d heads and ej22t pistons. Best part about the dohc heads (as mentioned above) is that they have an oil feed for the turbo, and you can drill into them for the coolant (either the return or supply I am not sure) and the oil return. I talked to a master mechanic about the compression ratio and he said if I am near 7.5:1 compression ratio it will be safe to run a good amount of boost. I could care less about off the line power. I don't plan on launching my car or trying to race from a dead stop, don't feel like replacing my transmission.
97ej22e 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
Stock cam specs and interchangability- 97 2.5 heads with 04 STi cams? boostedballs Built Motor Discussion 5 05-11-2010 12:10 PM
Mechkiller31st's 98 EJ22 getting swapped with 94 Ej22T Mechkiller31st Subaru Conversions 3 04-25-2010 05:55 PM
help with timing specs for 97 impreza ej22 paul power Newbies & FAQs 2 04-17-2009 03:13 AM
97-98 impreza 2.5 pistons in a 2004 block? upjeeper Built Motor Discussion 4 11-17-2007 03:47 PM
Wanted: Dyno sheets for a STOCK 97-98 and 99-01 EJ22 Harmonix Proven Power Bragging 0 12-14-2005 06:42 PM


All times are GMT -4. The time now is 09:04 AM.


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.