Welcome to the North American Subaru Impreza Owners Club Monday December 18, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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 12-13-2008, 12:25 PM   #1
potsy
Scooby Newbie
 
Member#: 139431
Join Date: Feb 2007
Default Stripped the motor down.

I have a 97 impreza, i bought a 98 2.5 dohc from a forester, the engine needs a crank and rods. Can i swap sti pistons, rods and crank and use my stock heads. The plan is to turbo it, and i would like to make it stronger. Anything i need to know?? Thanks
* Registered users of the site do not see these ads.
potsy is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 12-13-2008, 02:30 PM   #2
VIsubi
Scooby Specialist
 
Member#: 187834
Join Date: Aug 2008
Vehicle:
06 2.5i impreza
Red

Default

yeah from what they say on here its possible to do only thing is you have to either tap or weld a turbo return line int one of the heads I think whats wrong with the crank you sure its not just bearings and everything else upwards...this is also my plan I think I'm gona go ahead and by the turb okit for the 2.5i run the 67 pounds of boost then when the engine needs rebuilding replace it with sti pistons and rods..and bearings that way it'll be an easy break down and put back up rather than the 06 wrx swap...the heads flow better than the DOHC anyways and you need boost for the DOHC heads to flow good. Anyone like to continue on this subject that has already done it already.
VIsubi is offline   Reply With Quote
Old 12-13-2008, 04:55 PM   #3
GrundleJuice
NASIOC Supporter
 
Member#: 165749
Join Date: Dec 2007
Chapter/Region: South East
Location: Central Floriderp
Default

67 pounds of boost! wow, you are going to be super fast!

Anyway, OP, I can't explain how much better the answers you get will be over in the aftermarket forced induction forum. I have seen a lot of bad info about turbo-ing the n/a EJ in this forum. good luck.
GrundleJuice is offline   Reply With Quote
Old 12-13-2008, 06:09 PM   #4
zavier
Scooby Specialist
 
Member#: 141189
Join Date: Feb 2007
Chapter/Region: Tri-State
Location: Philadelphia
Vehicle:
2007 2.5i (NBP)
2018 STI Limited (ISM)

Default

Quote:
Originally Posted by RaceFaceXC View Post
67 pounds of boost! wow, you are going to be super fast!
i can open hope he meant 6-7psi...67psi is just crazy retarded lol
zavier is offline   Reply With Quote
Old 12-13-2008, 07:10 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

potsy,
Even though this is the wrong forum, I am happy to help you. You are going the right direction with this. You can put STi rods and pistons into your engine, along with the crank. The catch is that your block is phase I and had the thrust bearing in the wrong location. But that can be moved over with the installation of a phase II crank like one from an STi.

The heads from a DOHC Ej25 already have the proper allowances for adding the coolant and oiling for supplying a turbo. They are pretty easy to open up and use.

My best suggestion is that you head over to the AFI forum and start reading reddevil's threads. He will give you the best idea of what exactly you are going to need to do to make things work. You might get some interesting new ideas while you are at it.
Matt Monson is offline   Reply With Quote
Old 12-13-2008, 07:54 PM   #6
GrundleJuice
NASIOC Supporter
 
Member#: 165749
Join Date: Dec 2007
Chapter/Region: South East
Location: Central Floriderp
Default

Quote:
Originally Posted by zavier View Post
i can open hope he meant 6-7psi...67psi is just crazy retarded lol
Yes, I also hope. My was an attempt to show friendly sarcasm. Emoticons never works on forums.
GrundleJuice is offline   Reply With Quote
Old 12-15-2008, 09:15 AM   #7
potsy
Scooby Newbie
 
Member#: 139431
Join Date: Feb 2007
Default

Thanks man, I'll do that. Any good places for used parts? Any specific years of sti cranks rods, etc. Are the sti pistons cast or forged?
potsy is offline   Reply With Quote
Old 12-15-2008, 03:59 PM   #8
yarrgh
Scooby Specialist
 
Member#: 80465
Join Date: Jan 2005
Chapter/Region: RMIC
Location: Bailey, CO
Vehicle:
2001 2.5RS
Black Diamond Pearl

Default

search, search, and more search. read until you're sick of it and then read some more. the answers are out there.
yarrgh 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
Darn it... Just stripped the threads on the bolt that holds the knock sensor in. Surestick Normally Aspirated Powertrain 3 04-21-2010 06:28 PM
Tore Down The Motor And This Is What I Found 04psmgt35sti Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 23 04-18-2009 07:36 PM
Tearing my motor down...A few ?'s sts2689 Newbies & FAQs 0 06-16-2008 02:39 PM
Stripped the tranny on Tuesday...car back on the road Thursday...Thanks Subetek!! wrxnate Rocky Mountains Impreza Club Forum -- RMIC 2 01-18-2003 05:12 AM
Got Responce!! :D, Who was I motoring down 287 south with today?? STM RS(00-01 seden) munkis Tri-State Area Forum 0 09-23-2001 07:53 PM

All times are GMT -4. The time now is 07:15 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.