Welcome to the North American Subaru Impreza Owners Club Friday December 19, 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 > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

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 10-02-2008, 02:07 AM   #1
x Mr Awesome x
Scooby Newbie
 
Member#: 180305
Join Date: May 2008
Chapter/Region: MWSOC
Location: Joplin, MO
Vehicle:
2008 WRX
Metallic Grey

Default VF39 Swap in 2008 WRX What do I need?

I want to buy the vf39 from my friends 2008 sti and intercooler, if possible. I know a lot of guys have done this swap. Can anyone just tell me exactly what I need to make this happen? Thanks a million for anyone that helps!
-ben
* Registered users of the site do not see these ads.
x Mr Awesome x is offline   Reply With Quote
Old 10-02-2008, 02:22 AM   #2
preacher#1
Top Scoob 022
 
Member#: 129894
Join Date: Oct 2006
Chapter/Region: SCIC
Location: Laguna Beach
Vehicle:
FSTI '04 4EAT Sierra
Gold Metallic 20G-XT, EWG

Default

Lets see...It depends on your current set-up, but assuming you are completely stock...

You will need,

Definitely-
engine management or tune,qualified mechanic,hoses & y-pipe,

Possibly-
gaskets, bpv/bov, fuel injectors, fuel pump

A higher flowing downpipe wouldn't hurtcha....
I'm prolly missing a few things.....GL!
preacher#1 is offline   Reply With Quote
Old 10-02-2008, 04:16 AM   #3
x Mr Awesome x
Scooby Newbie
 
Member#: 180305
Join Date: May 2008
Chapter/Region: MWSOC
Location: Joplin, MO
Vehicle:
2008 WRX
Metallic Grey

Default

Probably should mention that I have an Invidia catted downpipe, SPT Exhaust, and soon to have Cobb Accessport. Okay. When we were eyeballing the engine bays, particular bolt points were very different making 'swaps' unlikely. Anybody that has done this care to enlighten me?
x Mr Awesome x is offline   Reply With Quote
Old 10-02-2008, 04:23 AM   #4
Makako54
Scooby Newbie
 
Member#: 110013
Join Date: Mar 2006
Chapter/Region: South East
Location: Miami, FL
Vehicle:
2006 Impreza WRX
Black

Default

I think your gonna need the intake manifold and the throttle body from the 08 or a previous WRX.
Makako54 is offline   Reply With Quote
Old 10-02-2008, 05:36 AM   #5
x Mr Awesome x
Scooby Newbie
 
Member#: 180305
Join Date: May 2008
Chapter/Region: MWSOC
Location: Joplin, MO
Vehicle:
2008 WRX
Metallic Grey

Default

So doing some research and noticed the 08 stis run a VF48, not the VF39 that I was told. So this would be the turbo I'd be looking to purchase and swap. I need as much info as I can get!
Thanks again,
-ben
x Mr Awesome x is offline   Reply With Quote
Old 10-02-2008, 11:05 AM   #6
ThreeEleven
Scooby Specialist
 
Member#: 157894
Join Date: Aug 2007
Chapter/Region: MWSOC
Location: Saint Peters, MO
Vehicle:
2007 WRB WRX
EJ257

Default

Larger TMIC or FMIC. Fuel pump. Your injectors will be fine for the VF series turbo. You're correct about the vf48 and not the vf39. You will NOT need a new intake manifold or a new TB. You don't NEED the fuel pump, but it acts like insurance for your car and your new toys and I'd def. recommend it. You might need a new BOV depending on the amount of boost you're wanting to run, but I'm not sure on the 08+. I know on 02-07 WRX, the stock BPV starts leaking around 20+psi. Another thing to think about is a MBC to net higher boost. But I would only recommend that with a protune. Not an OTS map from Cobb.
ThreeEleven is offline   Reply With Quote
Old 10-02-2008, 11:47 AM   #7
Cyni
Scooby Newbie
 
Member#: 161822
Join Date: Oct 2007
Chapter/Region: W. Canada
Location: Calgary, AB, Canada
Vehicle:
2008 WRX
Dark Grey Metallic

Default

Yes, you DO need to change out the intake manifold.

Our car has a Legacy Style turbocharger, and to use an older style WRX or STi turbo, you'll need to at least do the following:

Intake Manifold/Drive By Wire Throttle Body
Upgraded TMIC
Turbo
Cyni is offline   Reply With Quote
Old 10-02-2008, 12:43 PM   #8
ThreeEleven
Scooby Specialist
 
Member#: 157894
Join Date: Aug 2007
Chapter/Region: MWSOC
Location: Saint Peters, MO
Vehicle:
2007 WRB WRX
EJ257

Default

he's not using an older style turbo? he's using an 08 sti's vf48
ThreeEleven is offline   Reply With Quote
Old 10-02-2008, 12:48 PM   #9
camber
Scooby Newbie
 
Member#: 128746
Join Date: Oct 2006
Default

Quote:
Originally Posted by x Mr Awesome x View Post
I want to buy the vf39 from my friends 2008 sti and intercooler, if possible. I know a lot of guys have done this swap. Can anyone just tell me exactly what I need to make this happen? Thanks a million for anyone that helps!
-ben

I wait for the tuned numbers of VF-52 from the WRX 265. It's said(and supposdly confirmed by people in the know) to be the same turbo as a VF-48 but with a compressor cover to match the LGT/new WRX style TMIC.
camber is offline   Reply With Quote
Old 10-02-2008, 12:49 PM   #10
ThreeEleven
Scooby Specialist
 
Member#: 157894
Join Date: Aug 2007
Chapter/Region: MWSOC
Location: Saint Peters, MO
Vehicle:
2007 WRB WRX
EJ257

Default

oh yeah, I forgot the 08 wrx tmic are baby squares. Might be hard to swap out the intercoolers.
ThreeEleven is offline   Reply With Quote
Old 10-02-2008, 02:16 PM   #11
Nuke209
Scooby Specialist
 
Member#: 108089
Join Date: Feb 2006
Chapter/Region: MWSOC
Location: Minnesota
Vehicle:
2003 WRX
NF Performance

Default

Quote:
Originally Posted by THR3E11EVEN View Post
he's not using an older style turbo? he's using an 08 sti's vf48
08 sti's still uses the same 'setup' as the older sti.
they did not switch intake manifold.

So in order for the turbo to work, he'll have to upgrade the tmic and intake manifold (dbw)
Nuke209 is online now   Reply With Quote
Old 10-02-2008, 03:41 PM   #12
camber
Scooby Newbie
 
Member#: 128746
Join Date: Oct 2006
Default

If he goes with a VF39 and wants to retain a TMIC. He has two options.

Do a full STI swap TMIC, Intake manifold and turbo or buy one of these TMICs http://www.tuningalliance.com/produc...c15f8fd45b95fb

with the right elbow to make it work.

Also, you can go FMIC with VF39.....

Although, the most plug and play option would be to get your hands on a VF-52. Which would mean just swapping out the turbo. However, I would wait to see if the tuned results for these turbos, match a tuned VF-39/48 power.
camber is offline   Reply With Quote
Old 10-02-2008, 04:04 PM   #13
ThreeEleven
Scooby Specialist
 
Member#: 157894
Join Date: Aug 2007
Chapter/Region: MWSOC
Location: Saint Peters, MO
Vehicle:
2007 WRB WRX
EJ257

Default

Ok, so you're saying between an 08 wrx and the 08 sti turbo swap, he'd have to swap his intake manifold as well? Why would you have to do that?
ThreeEleven is offline   Reply With Quote
Old 10-02-2008, 04:16 PM   #14
camber
Scooby Newbie
 
Member#: 128746
Join Date: Oct 2006
Default

Quote:
Originally Posted by THR3E11EVEN View Post
Ok, so you're saying between an 08 wrx and the 08 sti turbo swap, he'd have to swap his intake manifold as well? Why would you have to do that?

If he wants to use an STI style turbo and retain a TMIC the two options are:

1. do the full STI swap to use the STI TMIC(the STI TMIC won't mount up to the new turbo style or intake)
2. buy the Tuning Alliance TMIC and the appropriate elbow.
camber is offline   Reply With Quote
Old 10-02-2008, 04:21 PM   #15
ThreeEleven
Scooby Specialist
 
Member#: 157894
Join Date: Aug 2007
Chapter/Region: MWSOC
Location: Saint Peters, MO
Vehicle:
2007 WRB WRX
EJ257

Default

^well stated. I knew the intercoolers were wierd and that the intake manifolds werent the same but I didn't know that the 08 STi's were so much different. I also didn't know that they haven't started making aftermarket TMICs for the 08 WRX.
ThreeEleven is offline   Reply With Quote
Old 10-02-2008, 04:39 PM   #16
camber
Scooby Newbie
 
Member#: 128746
Join Date: Oct 2006
Default

Quote:
Originally Posted by THR3E11EVEN View Post
I also didn't know that they haven't started making aftermarket TMICs for the 08 WRX.
They have been making aftermarket TMIC for the '08 WRX since '05

Just that they happened to be for the Legacy GT
camber is offline   Reply With Quote
Old 10-02-2008, 04:50 PM   #17
blkwrx06
Scooby Newbie
 
Member#: 190753
Join Date: Oct 2008
Location: everywhere
Default

Quote:
Originally Posted by x Mr Awesome x View Post
So doing some research and noticed the 08 stis run a VF48, not the VF39 that I was told. So this would be the turbo I'd be looking to purchase and swap. I need as much info as I can get!
Thanks again,
-ben
Quote:
Originally Posted by Cyni View Post
Yes, you DO need to change out the intake manifold.

Our car has a Legacy Style turbocharger, and to use an older style WRX or STi turbo, you'll need to at least do the following:

Intake Manifold/Drive By Wire Throttle Body
Upgraded TMIC
Turbo
These are correct
blkwrx06 is offline   Reply With Quote
Old 10-02-2008, 05:47 PM   #18
Big_Red
Scooby Newbie
 
Member#: 189497
Join Date: Sep 2008
Chapter/Region: South East
Location: savannah, ga.
Vehicle:
2008 WRX 5 door

Default

so your saying the new wrx's arent drive by wire?
Big_Red is offline   Reply With Quote
Old 10-03-2008, 12:37 AM   #19
sv sti
Scooby Newbie
 
Member#: 190802
Join Date: Oct 2008
Default

fuel injectors
sv sti is offline   Reply With Quote
Old 10-03-2008, 02:04 AM   #20
jmun671
Scooby Newbie
 
Member#: 178919
Join Date: May 2008
Location: "Where America's day begins."
Vehicle:
2008 WRX 5-door
WRB

Default

Here's some reference info for you. I found this by searching "STI swap" on legacygt.com only to be led back to NASIOC but a search tip is to use "Search Titles Only" in the advanced features.

Linked from legacygt.com
http://forums.nasioc.com/forums/show....php?t=1184171

Original legacygt.com thread
http://www.legacygt.com/forums/showt...light=sti+swap

These should help you a bit more I hope

J
jmun671 is offline   Reply With Quote
Old 10-03-2008, 11:30 AM   #21
BlackHole
Scooby Newbie
 
Member#: 85525
Join Date: Apr 2005
Vehicle:
05 LGT Wagon 5MT
ABP

Default

Another simple approach is to find a VF40 compressor cover from an 05+ Legacy GT and have it machined to fit the VF39 compressor wheel. No need for an STi swap and you can use Legacy GT TMICs.
BlackHole is offline   Reply With Quote
Old 10-03-2008, 05:47 PM   #22
stealth06wrx
Scooby Specialist
 
Member#: 131568
Join Date: Nov 2006
Chapter/Region: MWSOC
Location: Hudson, WI
Vehicle:
2006 WRX to 2015 WRX
OB Swirl / DGM

Default

the 08 wrx has a legacy type turbo and thus it cannot use an sti turbo without swapping the intake manifold which would be a pain i think.
stealth06wrx is online now   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
2.5 RS swap in 02 WRX...What is needed? Tr2laozboi Newbies & FAQs 7 01-02-2010 12:11 AM
Closed Deck EJ20G swap in 02 WRX??? What esle do i need? Wrx_Fan_0717 Built Motor Discussion 13 03-06-2009 06:01 PM
vf39 turbo on 2.0 wrx what do i need for the turbo???? subaruwrx07trmaniac Newbies & FAQs 26 01-07-2009 04:57 PM
Doing an AT fluid swap in a few days...do i NEED to change the filter? kaisersouse Normally Aspirated Powertrain 8 08-30-2005 11:14 PM
WRX/STI Radiator in 2000 RS, what do I need amorton Normally Aspirated Powertrain 1 07-15-2005 07:39 PM


All times are GMT -4. The time now is 07:08 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.