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Old 06-09-2009, 02:31 PM   #1
Fathopper
Scooby Newbie
 
Member#: 162075
Join Date: Oct 2007
Default Noob with way noob question

Hey Guys...

I have a 2007 Impreza Outback Sport. I bought the car cause i luv to camp/surf/fish...etc and the extra clearance sounded like a good idea...

Now that i've had it for a couple years, i'm interested in what would make this thing go faster...

Any ideas on what can be done to make the stock 2.5 quicker ?? I know obviously it won't ever touch the WRX but just wanted to know the potential of the stock engine and whether it would be worth modding.....

Cheers !!
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Old 06-09-2009, 02:38 PM   #2
Defiant Autospeed
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Join Date: Jul 2007
Location: Austin/Beverly 2 of us now!
Vehicle:
2007 FXT
WRB

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Its pretty limited, the NA subbie motors make pretty much all they already can without doing major work (pistons/cams etc)

I can also tell you bolt ons alone, are next to worthless. IE an intake, catback, even a header and high flow cat, doesnt make much difference, and when you look at the costs involved, it really isnt worth it.

However, if you tune it, you do get some actual power, not a lot, but more than the bolt ons would get you otherwise.

SO, I would go

Intake
Catback
Good custom tune.

You wont spend a ton, and you will get some actual results, not huge, but enough that you will most definitely feel it
Beyond that, you really as best off (financially and effort wise) looking at a WRX motor swap, which is cheaper than you would think.
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Old 06-09-2009, 02:41 PM   #3
Super_HKS
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Member#: 154434
Join Date: Jul 2007
Chapter/Region: NWIC
Location: USMC Land
Vehicle:
2009 WRX Hatch <@_@>
SWP

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Quote:
Originally Posted by Fathopper View Post
Hey Guys...

I have a 2007 Impreza Outback Sport. I bought the car cause i luv to camp/surf/fish...etc and the extra clearance sounded like a good idea...

Now that i've had it for a couple years, i'm interested in what would make this thing go faster...

Any ideas on what can be done to make the stock 2.5 quicker ?? I know obviously it won't ever touch the WRX but just wanted to know the potential of the stock engine and whether it would be worth modding.....

Cheers !!
Well with the 2.5 engines the torque it makes is better than the 2 liters. With a N/A (naturally aspirated) engine, it will still be able to make a descent amount of power but will not have as much power as a forced induced upgrade. You can go crazy with an N/A motor and change the internals/cams/etc but that takes time and alot of money.

So in my honest opinon Here is what i would do in your situation.

You want a little get up and go and you want your car to sound like that sexy beastly subaru. here is what you do
Get the ebay borla replica headers. They shouldnt crack and they will give that boxer rumble. (The borla replica headers are a unequal length header thus giving that unique sound like a wrx or STI). The stock headers are equal length thus giving the sound of a honda/acura/etc

Secondly get a catback that fits your needs. The catback styles range from n1 style to single tip to dual tip. Which ever you like get it. Stromung makes great catbacks for the imprezas

Thirdly get a intake. Shortram or cold air are both fine. With a N/A platform you will notice a big difference in the intake. You will get more horses, better gas milage, and cool sound

If you follow my steps and get those mods, your ride will be noticable faster, more enjoyable, and will give you alot of kudos!

Happy modding bro
-Daniel
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Old 06-09-2009, 03:02 PM   #4
Fathopper
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Member#: 162075
Join Date: Oct 2007
Default

Quote:
Originally Posted by Defiant Autospeed View Post
Its pretty limited, the NA subbie motors make pretty much all they already can without doing major work (pistons/cams etc)

I can also tell you bolt ons alone, are next to worthless. IE an intake, catback, even a header and high flow cat, doesnt make much difference, and when you look at the costs involved, it really isnt worth it.

However, if you tune it, you do get some actual power, not a lot, but more than the bolt ons would get you otherwise.

SO, I would go

Intake
Catback
Good custom tune.

You wont spend a ton, and you will get some actual results, not huge, but enough that you will most definitely feel it
Beyond that, you really as best off (financially and effort wise) looking at a WRX motor swap, which is cheaper than you would think.


Cheers !!

I was actually thinking if a WRX engine swap would be possible, now that they've supposedly fixed the prob on the 09 engines......can you point me in the right direction?

I'm thinking the dealer prob won't touch this with a 20 ft pole....
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Old 06-09-2009, 03:03 PM   #5
Fathopper
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Join Date: Oct 2007
Default

Thanks for the suggestions man....ppreciate it !!
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Old 06-09-2009, 03:05 PM   #6
wawawrx
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Location: Conshohocken
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'08 E92 M3
'95 GC ZJ

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Quote:
Originally Posted by Fathopper View Post
Cheers !!

I was actually thinking if a WRX engine swap would be possible, now that they've supposedly fixed the prob on the 09 engines......can you point me in the right direction?

I'm thinking the dealer prob won't touch this with a 20 ft pole....
you want the dealer to do an 09 WRX Swap into your 07 OBS
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Old 06-09-2009, 03:13 PM   #7
The_ManCub
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Member#: 197010
Join Date: Dec 2008
Chapter/Region: South East
Location: Fl, Santa Rosa Beach/Sandestin
Vehicle:
2006 WRX vf39/ewg
CGM **Drunkmann tuned**

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bump power, work on brakes and suspension.

if you like traveling on gravel, dirt,sand etc then look into lifting a little using some forester springs or aftermarket shock/spring combos.
or if you asphault roads, then coilovers or appropriate spring/shock combo.

...as for the power, not much gains from what you'd have to invest.so in my eyes, not worth it.
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Old 06-09-2009, 03:17 PM   #8
The_ManCub
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Member#: 197010
Join Date: Dec 2008
Chapter/Region: South East
Location: Fl, Santa Rosa Beach/Sandestin
Vehicle:
2006 WRX vf39/ewg
CGM **Drunkmann tuned**

Default

p.s dont swap lol, thats like taking 4 trips to costa rica lol(i take them once a year).


but if your sooo into power, sell obs and get a limited wagon. similar
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Old 06-09-2009, 03:21 PM   #9
TurboGoat324
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Member#: 208297
Join Date: Apr 2009
Chapter/Region: SCIC
Location: SoCal
Vehicle:
2004 WRX
PSM

Default

Quote:
Originally Posted by Fathopper View Post
Cheers !!

I was actually thinking if a WRX engine swap would be possible, now that they've supposedly fixed the prob on the 09 engines......can you point me in the right direction?

I'm thinking the dealer prob won't touch this with a 20 ft pole....
The dealer will do anything you pay them to do, it's just in almost all cases the dealer's price for labor is a lot higher than other shops. Also why do you want an 09 WRX engine? You should consider picking up a used WRX engine, becasue I promise you going from a N/A 2.5 liter to any WRX engine is like night and day, plus it'll save you money to buy used .
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Old 06-09-2009, 03:24 PM   #10
Fathopper
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Join Date: Oct 2007
Default

Groovy !
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