What mods can I do to improve my 1998 2.5 RS? - Page 2 - Subaru Impreza GC8 & RS Forum & Community: RS25.com
Private Support i-Trader Ratings Become a Vendor Rules for VendorsModsUsers Contact
Subaru Impreza GC8 & RS Forum & Community: RS25.com
gc8 RSS GC8 Facebook Subaru GC8 Twitter Subaru YouTube Channel Subaru Sticker
Login below or Register Now
Register Mark Forums Read FAQ Advertise
Go Back   Subaru Impreza GC8 & RS Forum & Community: RS25.com > >
What mods can I do to improve my 1998 2.5 RS?
Thread Tools Display Modes
Old 04-07-2018, 12:51 PM   #11
Touge Monster
Join Date: Oct 2016
Trader Rating: (0)
Posts: 3

I also have a '98 RS that I've turned into a weekend track car. It's still naturally aspirated and you could say it has been more reliable than the turbo models. Every part on the car, down to the nuts and washers are all OEM, besides any parts I added onto the car.

The only thing I've done is welded the rear differential and the car is gutted, still working on some PITA sound deadening material. This is, I plan on stiffening the chassis.
Touge Monster is offline   Reply With Quote
Sponsored Links
Old 04-10-2018, 05:13 PM   #12
Join Date: Nov 2007
Location: N. ID
Trader Rating: (1)
Posts: 79

Originally Posted by BABO8480 View Post
Has NA 2.5L, Any suggestions?
This is the infamous EJ25D - Internal Head Gasket blowing machine.

Do keep your coolant fresh and oil changes frequent.

Do Watch the temp gauge if it EVER goes above that "just below half-way" point, the HG is likely about to give it up.

Do STOP driving if it even looks like it's overheating, tow it home and fix it immediately. Rod bearings hate overheating and coolant...rods get 'ejected'.

Do Keep your valves adjusted (nasty shims) or you'll end up w/a burnt valve, and @ 100K your timing belt is due.

Do clean your MAF - w/the proper spray.

Do Not get a K&N - oily filter isn't good for the MAF - and you already have a CAI, so as stated above - no intake needed- unless you're into the noise.

@ $100 x 4 for the cams, Delta has options....

Do not let anyone else drive your car, either.
wtdash is offline   Reply With Quote
Old 07-23-2018, 01:50 AM   #13
Join Date: Jul 2018
Trader Rating: (0)
Posts: 12

I noticed a big difference when I went from 2.2 to 2.5. Felt a difference in torque when I changed the header, exhaust, and intake manifold. I installed all the parts together so I don’t know which three made the biggest difference
GuardsRed25rs is offline   Reply With Quote
Old 07-23-2018, 07:55 AM   #14
Car: 2001 gm6
Fav Mod: Sound system
Join Date: Feb 2017
Location: SoCal
Trader Rating: (1)
Posts: 101

Best bang for buck would be maintenance, suspension, braking, good tires. I recently did rear sway bar and that made a huge difference. Before that I was used to the so disappointing understeer. Rsb made the car fun to turn. Kyb ag with eibachs were also a good model for me.
Gc8fanboi is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
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

All times are GMT -7. The time now is 07:48 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright © 2019 VerticalScope Inc.
Designed & Powered by Domain Architect