Welcome to the North American Subaru Impreza Owners Club Sunday April 20, 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 11-06-2005, 10:50 AM   #1
Stealth_RS
Scooby Specialist
 
Member#: 95677
Join Date: Sep 2005
Chapter/Region: South East
Location: FL
Vehicle:
2004 WRX
WRB

Question Budget Turbo on 98RS

Hi

I am new on Subaru's and would like to know if I can budget boost my RS all I want is 5lbs. of boost

my car is mostly a autoX and show car so the woosh would come in real handy to turn heads

what would i need can I use stock WRX parts??? or something like that!!
* Registered users of the site do not see these ads.
Stealth_RS is offline   Reply With Quote
Old 11-06-2005, 12:28 PM   #2
Master2192
RIP 10/12/83 to 02/10/08
Scooby Specialist
 
Member#: 83254
Join Date: Mar 2005
Chapter/Region: NWIC
Location: Roy, Washington
Vehicle:
98 2.5 RS
04 WRX

Default

You have to modify the wrx turbo because it will not go below 7-9 psi of boost (Wastegate pressure). The absolute cheapest route would be to use turbo legacy parts. This will spool even faster than the WRX turbo. The usual parts list for peicing together parts from a turbo subaru is like this

-Crossmember
-Up Pipe
-Downpipe
-Turbo
-Intake and intercooler (i suggest getting a new intercooler as turbo legacys came with water-to-air intercoolers)
-Oil and Water lines for turbo

The 98RS has tiny injectors compared the the 99+ so you are going to need a RRFPR. At 5 psi of boost i'd doubt you'd need timing control, but it couldn't hurt to get something like a J&S Safeguard.
Master2192 is offline   Reply With Quote
Old 11-06-2005, 12:50 PM   #3
Sko
Scooby Specialist
 
Member#: 90396
Join Date: Jul 2005
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2005 Legacy 2.5i
Brilliant Silver Metallic

Default

There are used turbo kits for sale... for the "budget" part. They should get you what you need.
Sko is offline   Reply With Quote
Old 11-06-2005, 01:47 PM   #4
import111
Scooby Specialist
 
Member#: 24447
Join Date: Sep 2002
Chapter/Region: SWIC
Location: Tucson, Arizona
Vehicle:
2010 Evo GSR
GG

Default

Sell the 2.5RS and buy a WRX.
import111 is offline   Reply With Quote
Old 11-06-2005, 04:09 PM   #5
dingy
Scooby Newbie
 
Member#: 95843
Join Date: Sep 2005
Location: SCRANTON,PA
Vehicle:
2002 WRX & 98GT
SILVER / GREY

Default

i built my 98 legacy gt turbo setup for $220 inc the following.... junk yard saab t3 turbo, ebay wrx intercooler, a&a auto parts misc exhaust pipe for up & down pipe,
ebay used vortech 8:1 fmu, stole the tx's bov from my brother's 92 legacy turbo
the car runs like a dream at 4psi .... see the link below for a pic

http://pg.photos.yahoo.com/ph/racin2...66.jpg&.src=ph
dingy is offline   Reply With Quote
Old 11-06-2005, 05:13 PM   #6
Stealth_RS
Scooby Specialist
 
Member#: 95677
Join Date: Sep 2005
Chapter/Region: South East
Location: FL
Vehicle:
2004 WRX
WRB

Default

I already have modded WRX fuel injectors
Stealth_RS is offline   Reply With Quote
Old 11-06-2005, 05:45 PM   #7
ExecNav
Scooby Specialist
 
Member#: 30554
Join Date: Nov 2002
Chapter/Region: South East
Location: Ellijay, GA
Vehicle:
08 LGT Spec.B
01 Impreza RS-T

Default

Quote:
Originally Posted by Master2192
You have to modify the wrx turbo because it will not go below 7-9 psi of boost (Wastegate pressure). The absolute cheapest route would be to use turbo legacy parts. This will spool even faster than the WRX turbo. The usual parts list for peicing together parts from a turbo subaru is like this

-Crossmember
-Up Pipe
-Downpipe
-Turbo
-Intake and intercooler (i suggest getting a new intercooler as turbo legacys came with water-to-air intercoolers)
-Oil and Water lines for turbo

The 98RS has tiny injectors compared the the 99+ so you are going to need a RRFPR. At 5 psi of boost i'd doubt you'd need timing control, but it couldn't hurt to get something like a J&S Safeguard.
Actually, when I had my catted WRX downpipe, I was getting 5psi out of my TD04L. Also, many of the required turbo Legacy and WRX parts are the same. The deciding factor on price is how well he plays his cards. The only major difference between the Legacy and WRX is the turbo and intercooler. The WRX turbo is tiny enough and spools fast as crap on the EJ25. I have a catless HKS downpipe and I get full boost at a touch over 3k rpms. I also only spent $120 on my turbo.

On only 5psi, I suggest going the RRFPR route. Anything above that and you're better off getting an AFC or E-Manage with upgraded injectors and fuel pump. Since you have a MY99, WRX injectors will drop right in and with a WRX fuel pump, you can run 6-7 psi just fine with good tuning on an E-Manage or AFC. I have an E-Manage and RC440cc injectors/WRX fuel pump and I've been running 6-7 psi for 25k miles so far with not even a hint of detonation, ever. Compression on all 4 cylinders at 80k miles came back perfect.

BTW, with all the WRX exhaust parts, turbo, injectors, clutch, management, fuel pump, gauges and EVERYTHING, I spent less than 2,200 on my initial setup before the FMIC and a few other fun parts. It's all in the planning and frugality.

Pics, Mods, Prices, etc:

http://www.cardomain.com/ride/413413

-Brett
ExecNav is offline   Reply With Quote
Old 11-06-2005, 05:46 PM   #8
ExecNav
Scooby Specialist
 
Member#: 30554
Join Date: Nov 2002
Chapter/Region: South East
Location: Ellijay, GA
Vehicle:
08 LGT Spec.B
01 Impreza RS-T

Default

Quote:
Originally Posted by Stealth_RS
I already have modded WRX fuel injectors
Modded WRX injectors? On 5 psi?

-Brett
ExecNav is offline   Reply With Quote
Old 11-06-2005, 10:30 PM   #9
Sko
Scooby Specialist
 
Member#: 90396
Join Date: Jul 2005
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2005 Legacy 2.5i
Brilliant Silver Metallic

Default

Quote:
Originally Posted by import111
Sell the 2.5RS and buy a WRX.
He's got a 98 RS... the price differance is kinda big, might as well turbo it. And he said budget.
Sko is offline   Reply With Quote
Old 11-07-2005, 01:53 AM   #10
Master2192
RIP 10/12/83 to 02/10/08
Scooby Specialist
 
Member#: 83254
Join Date: Mar 2005
Chapter/Region: NWIC
Location: Roy, Washington
Vehicle:
98 2.5 RS
04 WRX

Default

Yeah, some people don't understand the budget thing.. Plus the RS has torque, its a lighter chassis, it has better looks, and maybe he just loves his car?
Master2192 is offline   Reply With Quote
Old 11-07-2005, 02:18 AM   #11
Kaymin
Scooby Specialist
 
Member#: 96076
Join Date: Sep 2005
Chapter/Region: NWIC
Location: 253
Vehicle:
RIP 96 SBM GC8
05 Burnt Orange Evo

Default

Quote:
Originally Posted by Master2192
Yeah, some people don't understand the budget thing.. Plus the RS has torque, its a lighter chassis, it has better looks, and maybe he just loves his car?
werd, I could get a wrx but ya know, the 2.5s just have me for some reason. I just gotta buy one, then turbo
Kaymin is offline   Reply With Quote
Old 11-07-2005, 03:13 AM   #12
ai42
Scooby Specialist
 
Member#: 71348
Join Date: Sep 2004
Chapter/Region: TXIC
Location: Frisco, TX
Vehicle:
1999 EJ207 RS.TI
VW Golf TDI 40mpg baby!

Default

Remote turbo setup is alot easier for DIY and you wont really need an intercooler.
ai42 is offline   Reply With Quote
Old 11-07-2005, 03:17 AM   #13
buhrietoe
Scooby Newbie
 
Member#: 39280
Join Date: Jul 2003
Chapter/Region: TXIC
Location: Justin, TX
Vehicle:
2001 Impreza 3.0RSR
86 Shelby Turbo GLHS #219

Default

Quote:
Originally Posted by ai42
Remote turbo setup is alot easier for DIY and you wont really need an intercooler.
Oops, posted that under my buddies name.
buhrietoe is offline   Reply With Quote
Old 11-07-2005, 07:23 AM   #14
Stealth_RS
Scooby Specialist
 
Member#: 95677
Join Date: Sep 2005
Chapter/Region: South East
Location: FL
Vehicle:
2004 WRX
WRB

Default

Quote:
Originally Posted by Master2192
Yeah, some people don't understand the budget thing.. Plus the RS has torque, its a lighter chassis, it has better looks, and maybe he just loves his car?
true with what i spent in this car i coulda bought me a WRX i just dont like the 02 so went with my GC8

I just love my car

ima buy me a 04 sti soon

for now chek my car outits all dirty and stuff)

pic:





Last edited by Stealth_RS; 11-07-2005 at 07:43 AM.
Stealth_RS is offline   Reply With Quote
Old 11-07-2005, 07:28 AM   #15
Tats
Scooby Specialist
 
Member#: 5692
Join Date: Apr 2001
Chapter/Region: Tri-State
Location: Lovely Florida, NY
Vehicle:
WTF? YES! I am
better than you!

Default

Modded WRX injectors will flow WAY too much for what you want. You'd never get a decent idle. Stock WRX injectors is the way to go for you.
Tats is offline   Reply With Quote
Old 11-07-2005, 07:46 AM   #16
Stealth_RS
Scooby Specialist
 
Member#: 95677
Join Date: Sep 2005
Chapter/Region: South East
Location: FL
Vehicle:
2004 WRX
WRB

Default

Quote:
Originally Posted by Tats
Modded WRX injectors will flow WAY too much for what you want. You'd never get a decent idle. Stock WRX injectors is the way to go for you.
yeah I ment modded to fit my car! sorry
and i still have a weird idle

also with all the mods my car has I could probably tail a stock wrx
thing is decently fast, i dont wanna list but its a lot o sh1et

and yes I have a roll bar
Stealth_RS is offline   Reply With Quote
Old 11-08-2005, 05:14 PM   #17
import111
Scooby Specialist
 
Member#: 24447
Join Date: Sep 2002
Chapter/Region: SWIC
Location: Tucson, Arizona
Vehicle:
2010 Evo GSR
GG

Default

Quote:
Originally Posted by Stealth_RS
true with what i spent in this car i coulda bought me a WRX i just dont like the 02 so went with my GC8

I just love my car

ima buy me a 04 sti soon

If you are planning on buying an STi soon, just do that and don't bother with the turbo kit. Some get lucky and some don't with turboing and N/A. I had a 01 2.5RS and put a turbo kit on it. After 6 months of that trouble I parted it out and sold the 2.5RS and bought an 05 STi. I am a million times happier in the STi and I have zero problems. I am just trying to save someone an expensive mistake, like the 1 I made.

Ryan
import111 is offline   Reply With Quote
Old 11-08-2005, 06:06 PM   #18
JessesTalon
Scooby Specialist
 
Member#: 63925
Join Date: Jun 2004
Chapter/Region: NWIC
Location: Beaverton, Oregon
Vehicle:
95 R33 / 06 WRX
Dark Slvr / Crystal Slvr

Default

i have a 22b STi tmic and a forge bov and a wrx downpipe and wrx mid pipe if you want to buy them off me.... (im selling my car)
JessesTalon is offline   Reply With Quote
Old 11-08-2005, 06:52 PM   #19
ai42
Scooby Specialist
 
Member#: 71348
Join Date: Sep 2004
Chapter/Region: TXIC
Location: Frisco, TX
Vehicle:
1999 EJ207 RS.TI
VW Golf TDI 40mpg baby!

Default

I have a WRX modified intercooler for GC8 use + greddy emanage for sale if your intrested for your turbo setup.
ai42 is offline   Reply With Quote
Old 11-08-2005, 06:59 PM   #20
IllNastyImpreza
Scooby Guru
 
Member#: 36333
Join Date: May 2003
Chapter/Region: NESIC
Location: East Kingston NH
Vehicle:
DIY project: life
I need more TIME!

Default

Quote:
Originally Posted by import111
Sell the 2.5RS and buy a WRX.
how original...
IllNastyImpreza is offline   Reply With Quote
Old 11-08-2005, 07:58 PM   #21
ExecNav
Scooby Specialist
 
Member#: 30554
Join Date: Nov 2002
Chapter/Region: South East
Location: Ellijay, GA
Vehicle:
08 LGT Spec.B
01 Impreza RS-T

Default

I screwed up my RS turbo kit and got an STi so everyone else should do the same...

My RS with under $2200 in bolt on performance parts can pull on a stock STi. I've never had any problems with my car... and it looks better.

-Brett
ExecNav is offline   Reply With Quote
Old 11-08-2005, 08:03 PM   #22
Master2192
RIP 10/12/83 to 02/10/08
Scooby Specialist
 
Member#: 83254
Join Date: Mar 2005
Chapter/Region: NWIC
Location: Roy, Washington
Vehicle:
98 2.5 RS
04 WRX

Default

The RS is all about power to weight, sorry but the WRX and STi are just too damn heavy to perform on the same level as the RS. Spend the money on the RS as there aren't a ton of RS-Ts rolling around
Master2192 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
Budget Turbo Build blkjag Built Motor Discussion 7 04-14-2010 10:09 AM
E-manage on 98RS buraddo Engine Management & Tuning 2 09-08-2005 10:33 PM
Rims, Budget turbo setup, 20mm Rear Sway Bar Sunrise City Rider South East Region Forum 16 02-02-2005 09:12 AM
Vacuum Tube on 98RS Intake.... what to do? hacman Normally Aspirated Powertrain 4 02-05-2001 09:37 PM
My budget turbo plan. Comments, please! Jon Bogert Normally Aspirated Powertrain 39 02-02-2001 05:08 PM


All times are GMT -4. The time now is 08:08 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.