Welcome to the North American Subaru Impreza Owners Club Wednesday August 23, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
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. 
Thread Tools Display Modes
Old 06-13-2004, 10:28 AM   #1
Scooby Newbie
Member#: 58211
Join Date: Mar 2004
Location: CT
2002 Impreza

Default ideas, thoughts about turboing an RS

hey iam posting this to help me and other people have a place where peolpe can answer some questions and post links on where to get some things.

to turbo charge am RS is it cheaper to biuld your own kit? or buy a kit from one of these companies

Forced air tech turbo kit
or the
AVO / SPO 2.5 RS Turbo Kit
or the
LudeSPEED Turbo Kit
or the
ASR Turbo Kit

those are the four that i have seen that make a turbo kit for my 02 RS. not sure if theres more out there but those seem to be the ones i find. if its better to buy the kit which one would you go with maybe give me some pros and cons of each of them. if to go with making my own kit. could some one give me a list of
everything i need. would i need any type of engine managment for the kit or a homemade kit and what would you recommend? i have also heard you can run 6-8 psi on stock internals is that true? i have also heard people say go with a top mount IC rather then a front mount any know why? i have more questions but cant remember them all
* Registered users of the site do not see these ads.
2002ImprezaRS is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 06-13-2004, 01:19 PM   #2
Scooby Newbie
Member#: 43617
Join Date: Sep 2003
Location: Florham Park, NJ
1976 Ford Bronco
R.I.P. Mark Vos, 96 ob


Ok. Before you get flamed as all hell, please use the search button as there are so many newbie repeat posts on "Turbo my RS"..."Turbo on the 2.5", etc.

But since I'm a nice guy I'll answer your questions. I am a cheap ass so I can't tell you much about those premade kits other than they are damn expensive.

What I can tell you is that all of them are good and basically come with everything you need, but I'm doing the custom kit setup. There is a thread about a week back that I started with EVERYTHING you could possibly need for a custom setup....look back or search under my name.

You will either need stand alone engine management or at least a RRFPR and SAFC (Search if u dont know what they mean)...I am using the E-Manage which does fuel control, and ignition timing for boost. With a late model 2.5 engine, I would not run over 5 psi because the internals are *****ty for turbo applications above that. Also, your transmission is probably a piece of crap (no offense) and your clutch might be crappy too. Just letting you know ahead of time if you didn't already know about the shortcomings of the old ass Subaru transmissions. Pieces of dog crap. If you have the RS with the scoop, just think about it this way...what would be cheaper...trying to custom make pipes that run all the way to the front or a 6 inch pipe that will run from the turbo outlet to the intercooler in. So a TMIC will definitely be a lot easier and ideal for your application.

What advice I can give you is READ READ READ. Spend days upon days searching for information and THEN once you get a good knowledge base, only then can you ask questions without getting flamed for being a newbie, since most of us have been here a while and don't really care for newb questions.


good luck

crk4 is offline   Reply With Quote
Old 06-13-2004, 01:26 PM   #3
*** Banned ***
Member#: 41300
Join Date: Aug 2003
Chapter/Region: Tri-State
Location: Midtown West (Lincoln Center)
2000 New York


Don't do it, but that is just my opinion, too much money in the long run. Save your cash and trade in for a stock FI Subaru or get a swap. Just my two cents and not trying to discourage so to speak
benjaminetanyahoo is offline   Reply With Quote
Old 06-13-2004, 04:38 PM   #4
Scooby Specialist
Member#: 40413
Join Date: Jul 2003
2001 BRP RS-T EJ257
Link'd - 252WHP 274WTQ


Dunno about 2002s, but I did mine 3 weeks ago, and Im loving the car every minute. The difference is huge, but it is a PITA. I went through alot of crap putting this thing together, finding engine management, and little parts here and there.

The clutch won't take more than 5 psi... that I can tell you from experience. I just changed my clutch....

I would buy a kit that includes everything, and go to a shop and have it installed. Pay the money, and you'll save yourself a lot of painful and stressful hours....

RSTs rule!
maxiav is offline   Reply With Quote
Old 06-13-2004, 04:51 PM   #5
Scooby Newbie
Member#: 60195
Join Date: Apr 2004
Chapter/Region: SCIC
Location: Glendale CA
2002 WRX
World Rally Blue


Heh another person with a 2002 like me looking to go turbo. well there are a few things you should know.

1. the 2.5L used in the RS had its pistons redesigned in 2002. IIRC they have a deeper V cut in their center and dont respond to boost as well as the older pistons.

2. SAFC produced by Apexi is not compatible with the 2002 IIRC.

3. You will need stand alone engine management no one reflashes the 2002 2.5RS ECU yet. Altho there is talk on the COBB forums that they have made some progress.

4. Please be aware of how much money this is goin to run you if you want to do it successfully and reliably.

Just a few suggestions.

have at least $4500.oo for a good turbo kit running somewhere between 4.5-6psi. with stand alone engine management.

have about 1-2K for upgraded clutch. and assorted transmission goodies.

remember your gonna wanna have a profesional install this thing so have another 1K for the install. + an extra 5-8hundred for tuning and dyno time.

Most of my estimates are a bit on the high side but you get the idea on average your probly looking at around 7-8K to do it right and be able to run it every day. oh dont forge the misclaneous goodies like down/up pipe
custom exaust work to have the them mated to your current exhaust systsem. stuff like that pluss a few K extra just in case you have to fix thingss somethign that always seems to come up in every build i have read abou on these forums.

Last edited by Akarui; 06-13-2004 at 04:59 PM.
Akarui is offline   Reply With Quote

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
Scond thoughts about buying an 06 STI after seeing SoA not stand behind their cars Jag32 Warranty Issues & SOA Problems 30 06-01-2006 06:55 PM
With the high cost of gas are you having second thoughts about turbos? rsholland General Community 77 08-15-2005 04:34 PM
need more info about turboing '02 RS MeshmeZ Normally Aspirated with bolt-on Forced Induction Powertrain 1 04-09-2004 04:33 PM
turbo an rs? what are my options ace2777 Normally Aspirated with bolt-on Forced Induction Powertrain 2 10-07-2001 06:39 PM
turboing an RS??? snipes Normally Aspirated with bolt-on Forced Induction Powertrain 8 07-16-2001 10:16 PM

All times are GMT -4. The time now is 06:39 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.