Welcome to the North American Subaru Impreza Owners Club Monday December 29, 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 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 12-28-2008, 12:56 AM   #1
Kountersteer
Scooby Newbie
 
Member#: 198529
Join Date: Dec 2008
Chapter/Region: E. Canada
Location: Canada
Vehicle:
'07 2.5i
Garnet Red Pearl

Default Subie Virgin: '07 2.5i... Where do I start?

Two weeks ago I came home with my very first subie; 2.5i, 5 speed base wagon in Sonoma Red. We've had 3 snowfalls since for a total of about 40 cm (roughly 16"-18") and I can't get over how much I love winter now! Will post pics as soon as we get some sun! ...and I can figure out how!!!

The reason for my post is to get some advice on how much power gain I can get out my engine without going "Forced Air", and without doing all the internals. And wether it's worth it or not.

My goals are to keep it a daily driver, reliable but faster and more fun would be nice! Here's what I'm thinking:
-sway bars front and rear (20's I guess)
-17"-18" mags and tires (225/45)
-Pulley kit (ecu issues if I swap all 3?)
-Exhaust (axle back for staters or more if proven power gain)
-ECU upgrade (this is my biggest concern, cost vs gain)

Any advice would be greatly apreciated!

Thanks
* Registered users of the site do not see these ads.
Kountersteer is offline   Reply With Quote
Old 12-28-2008, 01:01 AM   #2
mert34
Scooby Newbie
 
Member#: 183598
Join Date: Jul 2008
Chapter/Region: NWIC
Location: IF
Vehicle:
2013 Evolution GSR
Phantom Black

Default

from what i have read on here, its not worth it, suspension is where it counts i guess on our cars.
mert34 is offline   Reply With Quote
Old 12-28-2008, 01:01 AM   #3
cmiovino
Scooby Guru
 
Member#: 134005
Join Date: Dec 2006
Chapter/Region: MAIC
Location: Pittsburgh, PA
Vehicle:
2004 WRX Premium
PSM

Default

20mm rear sway. Keep the stock 19mm front.

17" wheels look good, 18" are getting too big.

Pulley kit would free up form HP.

Exhaust, axleback is good for sound (it's all I had and enjoyed it). Getting a midpipe with it to make a catback isn't going to net you any more power really. If you get headers or a high flow cat, you will make some more HP.

ECU upgrades are costly and I'd like to see you get other things to make the ECU upgrade worthwhile. If you plan on doing all this NA power work, I'd get it lowered at some point too.
cmiovino is offline   Reply With Quote
Old 12-28-2008, 01:02 AM   #4
cmiovino
Scooby Guru
 
Member#: 134005
Join Date: Dec 2006
Chapter/Region: MAIC
Location: Pittsburgh, PA
Vehicle:
2004 WRX Premium
PSM

Default

Quote:
Originally Posted by mert34 View Post
from what i have read on here, its not worth it, suspension is where it counts i guess on our cars.
I think NA cars are fun with an exhaust (axleback only if you're going cheap) and suspension work. Maybe a hybrid intake too for cheap. Wheel and tires too.
cmiovino is offline   Reply With Quote
Old 12-28-2008, 01:04 AM   #5
mert34
Scooby Newbie
 
Member#: 183598
Join Date: Jul 2008
Chapter/Region: NWIC
Location: IF
Vehicle:
2013 Evolution GSR
Phantom Black

Default

^ i agree, working on that myself with a UEL header and exhaust in progress. well soon to be.
mert34 is offline   Reply With Quote
Old 12-28-2008, 01:36 AM   #6
chazly413
Scooby Specialist
 
Member#: 151079
Join Date: Jun 2007
Chapter/Region: MAIC
Location: College Park, MD
Vehicle:
2005 2.5RS RBP
motec system exhaust-RIP

Default

Quote:
Originally Posted by cmiovino View Post
20mm rear sway. Keep the stock 19mm front.

17" wheels look good, 18" are getting too big.

Pulley kit would free up form HP.

Exhaust, axleback is good for sound (it's all I had and enjoyed it). Getting a midpipe with it to make a catback isn't going to net you any more power really. If you get headers or a high flow cat, you will make some more HP.

ECU upgrades are costly and I'd like to see you get other things to make the ECU upgrade worthwhile. If you plan on doing all this NA power work, I'd get it lowered at some point too.
I thought the RS/I/WRX had a 20mm front and the STI had the 19mm front, at least my 05 has a 20mm front, according to my service manual, and the 05 STI has a 19mm front, according to my service manual.
chazly413 is offline   Reply With Quote
Old 12-28-2008, 04:12 AM   #7
GrundleJuice
NASIOC Supporter
 
Member#: 165749
Join Date: Dec 2007
Chapter/Region: South East
Location: stupid Florida
Vehicle:
2007 No YELLING
on the bus!

Default

Quote:
Originally Posted by cmiovino View Post
20mm rear sway. Keep the stock 19mm front.

17" wheels look good, 18" are getting too big.

Pulley kit would free up form HP.

Exhaust, axleback is good for sound (it's all I had and enjoyed it). Getting a midpipe with it to make a catback isn't going to net you any more power really. If you get headers or a high flow cat, you will make some more HP.

ECU upgrades are costly and I'd like to see you get other things to make the ECU upgrade worthwhile. If you plan on doing all this NA power work, I'd get it lowered at some point too.

there is no reason to upgrade or change/add on to the factory ECU unless you get something for free. using a laptop and tactrix cable w/ RR/ECUFlash will give yo more ECU control than any aftermarket ecu/piggyback add on.

Keep in mind, bolt on mods will make very small differences without a tune, and potentially huge differences w/ a tune. So if you want to make noticeable power gains ECU tuning is a must. there really is no other way going about it.
GrundleJuice is offline   Reply With Quote
Old 12-28-2008, 12:09 PM   #8
kero
Scooby Specialist
 
Member#: 94299
Join Date: Aug 2005
Chapter/Region: Tri-State
Vehicle:
2000 2.5 RS Sedan
SRP

Default

My advice, some new wheels, stromung CBE (maybe UEL and HFC setup after that), tint the windows, paint the insides of the front headlights, put 05 rear tails on or at least 06 for the gray interiors housings, hella super tones, etc. Maybe a front lip, throw some GF210 springs and enjoy the car.

Don't go nuts with the car engine wise, we'll never be wrx's so why try.
kero is offline   Reply With Quote
Old 12-28-2008, 12:20 PM   #9
BigZach88
*** Banned ***
 
Member#: 190548
Join Date: Sep 2008
Chapter/Region: NESIC
Location: 860
Default

dammit i got excited i saw virgin and Subaru in the same line i enjoy both of those things lol
BigZach88 is offline   Reply With Quote
Old 12-28-2008, 01:50 PM   #10
Kountersteer
Scooby Newbie
 
Member#: 198529
Join Date: Dec 2008
Chapter/Region: E. Canada
Location: Canada
Vehicle:
'07 2.5i
Garnet Red Pearl

Default

Thanks for the replies everyone! There's no doubt I'm going to doing some int. & ext. mods for visual effect. But my main curiosity is wether or not there is a semi affordable way to get 30-50 hp the N/A way! I'm not sure I understand how any of this ECU flashing works, and they seem to be focused at WRX, & WRX STi. I haven't been able to find anywhere that states how much power gain I would get out of an ECU flash for N/A engines. Are there any other methods of electronicaly boosting hp on my car??

Oh! And one more thing, can anyone tell me how to post pics!

Thks
Kountersteer is offline   Reply With Quote
Old 12-28-2008, 03:19 PM   #11
GrundleJuice
NASIOC Supporter
 
Member#: 165749
Join Date: Dec 2007
Chapter/Region: South East
Location: stupid Florida
Vehicle:
2007 No YELLING
on the bus!

Default

you cant get power from just an ecu flash. you have to have done something that will allow more timing to be added without knocking (simplified). since the stock ECU image already runs more timing than the stock engine setup can handle, more than just catback and intake need to be done to make any measurable power. EL headers and HFC seem to be the point at which some real timing advance can be added which will equal more power that you can actually feel.

There are things that can be changed in the ECU image on even a stock motor that will change driveability for the better, make your engine more reliable (no knock) and get you a little better gas mileage all while making your car feel faster but not actually gaining any HP. This is all pertaining to the N/A '05+ EJ engines.
GrundleJuice is offline   Reply With Quote
Old 12-28-2008, 03:26 PM   #12
enjoiskater808
Scooby Newbie
 
Member#: 153686
Join Date: Jul 2007
Chapter/Region: SCIC
Location: SoCal
Vehicle:
2006 Impreza 2.5i
1994 Miata 1.8L

Default

If your going to do anything visual, start by lowering it on H-techs, Cobbs, or something similar because I know after a couple months of having my 2.5i sedan that wheel gap really started to bug me.

Your mod ideas look good and well thought out, one thing you might want to add is a short shifter, they give the car a nice sporty feel while driving as well as make your shifts a little quicker.

Good luck man!! cant wait to see some pics
enjoiskater808 is offline   Reply With Quote
Old 12-29-2008, 12:38 AM   #13
msingell
Scooby Newbie
 
Member#: 153097
Join Date: Jul 2007
Location: columbus, ohio
Vehicle:
2012 CRZ
PWP

Default

msingell is offline   Reply With Quote
Old 12-29-2008, 02:33 AM   #14
chazly413
Scooby Specialist
 
Member#: 151079
Join Date: Jun 2007
Chapter/Region: MAIC
Location: College Park, MD
Vehicle:
2005 2.5RS RBP
motec system exhaust-RIP

Default

Don't forget to get some struts (probably tokico d-specs) if you get some stiffer springs, it will really make a difference performance wise, and in the longevity of your struts.
chazly413 is offline   Reply With Quote
Old 12-29-2008, 02:29 PM   #15
watchunglava
Scooby Specialist
 
Member#: 168862
Join Date: Jan 2008
Chapter/Region: NESIC
Location: Portland Maine
Vehicle:
2007 ej253n/a 5speed
Red Sox Nation Lifer

Default

tires. those brigestones suck
watchunglava is offline   Reply With Quote
Old 01-01-2009, 10:50 PM   #16
SleeperWgn
Scooby Newbie
 
Member#: 176293
Join Date: Apr 2008
Chapter/Region: NWIC
Location: Portland, Oregon
Vehicle:
2007 Impreza 2.5 Wgn
Newport Blue Pearl

Default

Here's my setup and I love it:

WRX catback exhaust (cheap/free/ideal size FTW!)
hybrid intake
light crank pulley (agency power via www.rallitek.com)
STI springs (used = cheap/free FTW!)
KYB AGX struts
rallitek sway bars/endlinks
rims and tires! firestone winterforces on stocks for winter/rallyx, summers on Rotas.
SleeperWgn is offline   Reply With Quote
Old 01-01-2009, 11:01 PM   #17
chazly413
Scooby Specialist
 
Member#: 151079
Join Date: Jun 2007
Chapter/Region: MAIC
Location: College Park, MD
Vehicle:
2005 2.5RS RBP
motec system exhaust-RIP

Default

I just got some bridgestone potenza re960 all seasons on my rs, they're pretty nice for all seasons! Huge improvement over the RE92s.
chazly413 is offline   Reply With Quote
Old 01-01-2009, 11:22 PM   #18
2.5i
Scooby Specialist
 
Member#: 112986
Join Date: Apr 2006
Chapter/Region: NWIC
Location: Camano Island
Vehicle:
N/A Cam'd & Cornfed
DOM TUNED 06 Impreza

Default

Heres what I did and so far I am fairly happy.

F+R sways with endlinks
Catback Exhaust
Hybird intake
STi Pink springs
Had an ECU reflash until I had the engine replaced just haven't had time to get it reflashed.
2.5i is offline   Reply With Quote
Old 01-01-2009, 11:50 PM   #19
Zac86
Scooby Newbie
 
Member#: 136919
Join Date: Jan 2007
Chapter/Region: W. Canada
Location: North Pole
Vehicle:
2005 Legacy GT Wagon
ABP

Default

If I were you I would do the hybrid intake, UEL header, HFC, catback, struts/spring combo, swaybars and endlinks and some good tires. COBB is making an Accessport for the 05+ NA engines so you'll be in luck for some good tuning
Zac86 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
'07 2.5i... Where do I start? Kountersteer Newbies & FAQs 5 12-28-2008 10:54 AM
Super-budget '07 2.5i brake upgrade plans Mus35th Brakes, Steering & Suspension 7 01-22-2007 03:29 PM
Differences between '07 2.5i and WRX baj General Community 10 01-07-2007 01:57 PM
In Atlanta for 2 weeks, where do the Subies hang out silver arrow South East Region Forum 2 06-03-2006 09:41 PM


All times are GMT -4. The time now is 12:02 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.