Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-08-2009, 12:11 AM   #1
BigEag205
Scooby Newbie
 
Member#: 199537
Join Date: Jan 2009
Location: West Virginia
Vehicle:
2004 STI
Aspen White

Default 2002 WRX to 2005 STI motor swap. NEED HELP

Ok, i previously owned a ford mustang so i know relatively nothing about these cars. I bought a 2002 wrx with a blown motor for $3700, which i couldnt pass it up because i had driven a modded wrx b4 and had a blast, and bought a 2005 sti motor swap with all wires, ecu, ignition imobilizer, turbo, intercooler, the works. I dont really feel like swapping EVERY wire so was hoping someone could tell me what all 2002 wrx wire could stay and which ones need replaced. Would it be possible to plug in the STI ECU and ignition immobilizer and be done? Please go into detail with me. I have the EJ20 pulled and the new EJ257 sitting in the garage waiting for the car to be wired and ready for the motor. Anyone in the West Virginia area that could stop by and offer help would be greatly appreciated also, I live between Charleston and Huntington. Basically i need to know what all needs done in order to get this motor in and running right.
* Registered users of the site do not see these ads.
BigEag205 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-08-2009, 07:55 AM   #2
yebokmj
Scooby Specialist
 
Member#: 2213
Join Date: Aug 2000
Chapter/Region: NESIC
Location: Salem, NH USA
Vehicle:
1995 Impreza w/EJ257
Brilliant Red

Default

The easiest route is going to be swap the wiring harness, especially if you got the STi trans as well. The differance besides the immobilizer is the STi also has drive by wire and AVCS. Your best bet is going to be getting the wiring diagrams for both vehicles and going from there. No matter what route you go wiring wise it will not be plug and play you will need the wiring diagrams.
yebokmj is offline   Reply With Quote
Old 01-08-2009, 09:01 AM   #3
Zephyr
Scooby Specialist
 
Member#: 3362
Join Date: Dec 2000
Location: Central NJ
Vehicle:
2001 I've wired a
Few cars in my day

Default

Speaking from experience, pull the dash, pull the front fender liners, remove the WRX Front and Bulkhead harnesses, replace with same harnesses from STi. You may run into some issues with the automatic climate control feature. No reason to cut into your harness.

Z
Zephyr is offline   Reply With Quote
Old 01-08-2009, 11:09 PM   #4
BigEag205
Scooby Newbie
 
Member#: 199537
Join Date: Jan 2009
Location: West Virginia
Vehicle:
2004 STI
Aspen White

Default

What is AVCS and will i need it for the car to start and drive?
BigEag205 is offline   Reply With Quote
Old 01-10-2009, 06:42 PM   #5
BigEag205
Scooby Newbie
 
Member#: 199537
Join Date: Jan 2009
Location: West Virginia
Vehicle:
2004 STI
Aspen White

Default

ok...that was a dumb question, lol...
BigEag205 is offline   Reply With Quote
Old 01-13-2009, 12:46 AM   #6
Oni04project
Scooby Newbie
 
Member#: 193543
Join Date: Nov 2008
Chapter/Region: MWSOC
Location: Appleton
Vehicle:
2004 sold

Default

gut it and everything sti! hahaha

therefore you can have the awesome fire waving sti cluster!
Oni04project is offline   Reply With Quote
Old 07-02-2010, 01:38 PM   #7
BigEag205
Scooby Newbie
 
Member#: 199537
Join Date: Jan 2009
Location: West Virginia
Vehicle:
2004 STI
Aspen White

Default

sorry for the WAY overdue responce to this thread...and i mean WAY overdue lol. I completed the car and sold it in august of 09 i believe. I recieved a PM by someone in california stating they could convert the wrx and sti harnesses together for me so i sent them to him, and as promised, he returned them plug and play. Im sure i could have taken the time and mated them myself, but i wasnt willing to try that for the first time on this kind of project. You can run the sweeping STI cluster in a WRX as well, idk if you were aware of that or not, you just have to clip one of the wires leading to the cluster or youll blow your sterio fuse i believe. anyways, Car ran rediculously strong. It was a tuned 05 sti motor with fmic, short ram intake, and turbo back exhaust (invidia dp and hkp Hi-Po catback). Sounded great, highly recommended exhaust. To anyone looking into this swap i strongly recommend keeping the 5 spd, it will impress anybody who rides in it (big dif in boost build than the 6 spd). the 02-03 wrx tranny's do prove to be weak so you'll want to build them eventually. I had a stage 3 clutch and lightened flywheel in mine which proved to be too much for the tranny and would thump when taking off from a stop (new owner said the throw-out bearing and clutch were too strong for the tranny?)
BigEag205 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
2002 wrx with 05 sti motor...WHAT SUSPENSION IS NEEDED. BigEag205 Subaru Conversions 4 04-09-2009 11:34 PM
2002 WRX to 2000 2.5rs swap, will it work? Cyclops Transmission (AT/MT) & Driveline 4 02-04-2009 03:19 AM
Rear top hat bolt pattern 2002 wrx vs 2005 sti dcheyne55 Brakes, Steering & Suspension 4 06-11-2008 03:58 PM
2002 WRX Wagon w/STi motor/tranny 4sale-Aspen White mantra1 Private Vehicle 'For Sale' Classifieds 34 02-23-2006 11:30 AM
2002 WRX to 2005 STi. Pics within (of course) twotacosfor99cents Member's Car Gallery 15 09-09-2004 02:29 PM

All times are GMT -4. The time now is 10:20 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.