Welcome to the North American Subaru Impreza Owners Club Tuesday September 16, 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

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 12-06-2008, 10:43 PM   #1
WR-eX (Honda)
Scooby Newbie
 
Member#: 175141
Join Date: Mar 2008
Chapter/Region: BAIC
Location: socal
Vehicle:
2007 wrb wrx

Default vf48 swap into 07 wrx

Hi all! I was thinking of doing a vf48 swap into my 07 wrx.
I needed some opinions on what supporting mods would I need.
Sorry but I'm all so new to this. My current setup is a turboback exhaust and I'm running stage 2 with the accessport. The main reason I'm thinking of doing the swap is because I got mad boost creep/spiking issues. I figure, if I need to take out the turbo to port it - why not just upgrade it! One of my questions are also, do I need to port the vf48 so that I won't have any boost creep?
* Registered users of the site do not see these ads.
WR-eX (Honda) is offline   Reply With Quote
Old 12-06-2008, 11:14 PM   #2
07HaWkEyE
Scooby Specialist
 
Member#: 139080
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: chicago
Vehicle:
2006 Trailblazer SS
Summit White 6.0L V8

Default

Take the car into a tuner. The whole boost creep issue was mainly with the vf series turbos. Your td04 should not have this problem, hopefully a tuner can fix this problem for you so that you aren't masking some other problem with the car. A vf48 requires the same mods as a vf39 or vf43.
07HaWkEyE is offline   Reply With Quote
Old 12-07-2008, 06:50 AM   #3
Unabomber
Big Ron
Moderator
 
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
Vehicle:
on car parts so PM
me b4 j00 buy

Default

You need to talk to your tuner, NOT us. You'll probably need injectors and fuel pump. It may or may not creep and for that we have a sticky thread that details all of that at the top of this forum, but I would HIGHLY SUGGEST you send that turbo to the Vendor Defiant Autospeed for porting. This would eliminate the creep posibility + he could finally measure the turbo to finally find out if it's the same/bigger/different than the VF39/43 and put that damn issue to bed. PM him and ask about pricing and maybe he'll cut you a special deal since it's a 48.
Unabomber is offline   Reply With Quote
Old 12-07-2008, 09:11 AM   #4
RexTexWagon
Scooby Specialist
 
Member#: 150987
Join Date: Jun 2007
Chapter/Region: TXIC
Location: Austin, Tx
Vehicle:
2013 Ford Focus ST3
White

Default

+1 for defiant


But why are you creeping on a cobb map? Have you done something else to the car?
RexTexWagon is offline   Reply With Quote
Old 12-07-2008, 10:20 AM   #5
07HaWkEyE
Scooby Specialist
 
Member#: 139080
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: chicago
Vehicle:
2006 Trailblazer SS
Summit White 6.0L V8

Default

it may not be boost creep, read some of the ops threads/posts. hes had problems with his TGVs in the past and is modding out of order from what i can tell. OP list ALL of your mods please.
07HaWkEyE is offline   Reply With Quote
Old 12-07-2008, 11:15 AM   #6
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
08 Corvette Z06
problem Traction?

Default

any internal wastegate IHI tends to get boost creep...

for the turbo upgrade

you need:

VF48
walbro 255... your injectors are the same size as the sti's and they need not be upgraded
All4bSpinnin is offline   Reply With Quote
Old 12-07-2008, 11:44 AM   #7
jaxscuby
Sammo Hung
Moderator
 
Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: S Ga / Hell Rock
Vehicle:
2002 USDM WRX
WRB

Default

not all ihi boost creep..
come on dave...how many ihi turbos have you had?
jaxscuby is offline   Reply With Quote
Old 12-07-2008, 01:27 PM   #8
07HaWkEyE
Scooby Specialist
 
Member#: 139080
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: chicago
Vehicle:
2006 Trailblazer SS
Summit White 6.0L V8

Default

Quote:
Originally Posted by All4bSpinnin View Post
any internal wastegate IHI tends to get boost creep...
The OP is not running an IHI turbo. The TD04 is Mitsubishi made. If you read original post the OP is "thinking" about upgrading to the vf48 and currently has "boost creep" on the stock wrx turbo.
07HaWkEyE is offline   Reply With Quote
Old 12-08-2008, 11:40 AM   #9
ThreeEleven
Scooby Specialist
 
Member#: 157894
Join Date: Aug 2007
Chapter/Region: MWSOC
Location: Saint Peters, MO
Vehicle:
2007 WRB WRX
EJ257

Default

Quote:
Originally Posted by WR-eX (Honda) View Post
I'm thinking of doing the swap is because I got mad boost creep/spiking issues.
He said he was doing the swap because of boost creep, which is common with the 07 with a catless TBE. ^ He was saying that by upgrading to the VF48 may not remedy the problem. By him saying "tends to creep" he is saying they have tendencies of creeping, not all will definately creep, though I don't nessecerily agree or disagree with that statement.
Like All4BSpinning said, all you HAVE to have is your turbo and 255lph fuel pump. <- Bare minimum. Or you can be different and get the JDM STi FPR and keep your stock FP. Some say you can "dent" your stock FPR to have better flow. You can also get injectors, larger IC, new turbo inlet, etc. Just read and get your different options.

Last edited by ThreeEleven; 12-08-2008 at 11:48 AM.
ThreeEleven is offline   Reply With Quote
Old 12-08-2008, 12:20 PM   #10
WR-eX (Honda)
Scooby Newbie
 
Member#: 175141
Join Date: Mar 2008
Chapter/Region: BAIC
Location: socal
Vehicle:
2007 wrb wrx

Default

WOW! Thanks for all the replies guys... But what I was thinking was since I would have to take out the turbo to fix the creep, I might as well put in a turbo with a little more power since the removal of the turbo has to be done. Just so that one day I take out the turbo today to fix the creep and then later down the road decide to upgrade the turbo. At least right now I can save time and money on labor. But since creeping is an issue with ihi's or internal wastegates, I'm not sure what to do. Should I get the 48 ported or it doesn't need to like it's specs claims that it's prone to creep? Also, I already have in hand an 04 sti IC. So all I need is the fuel pump and am I good to go?
WR-eX (Honda) is offline   Reply With Quote
Old 12-08-2008, 12:31 PM   #11
WR-eX (Honda)
Scooby Newbie
 
Member#: 175141
Join Date: Mar 2008
Chapter/Region: BAIC
Location: socal
Vehicle:
2007 wrb wrx

Default

Quote:
Originally Posted by 07HaWkEyE View Post
it may not be boost creep, read some of the ops threads/posts. hes had problems with his TGVs in the past and is modding out of order from what i can tell. OP list ALL of your mods please.
My tgv problem was because of a faulty tgv. Subaru replaced it already.
My mods in order since day one was - catback, spt intake ( later removed and back to just catback now), cobb ap stg 1 w/ just catback, invidia catted downpipe ( now flashed to stg 2), 04 sti IC (removed because loss of mpg and CEL, took car into subaru and they replaced the tgv), back to full turboback stg 2 without the sti IC.
WR-eX (Honda) is offline   Reply With Quote
Old 12-08-2008, 05:51 PM   #12
ThreeEleven
Scooby Specialist
 
Member#: 157894
Join Date: Aug 2007
Chapter/Region: MWSOC
Location: Saint Peters, MO
Vehicle:
2007 WRB WRX
EJ257

Default

Porting and polishing will remedy boost creep but might not completely eliminate it, though it's possible it could. Are you really have THAT BIG of a problem with this?
Check this out: http://www.cobbtuning.com/info/?ID=3476
ThreeEleven is offline   Reply With Quote
Old 12-11-2008, 12:02 AM   #13
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
08 Corvette Z06
problem Traction?

Default

Quote:
Originally Posted by jaxscuby View Post
not all ihi boost creep..
come on dave...how many ihi turbos have you had?
VF 30, 39, and driven the 43 & 48

the VF48 should be the best performing model to date since things are typically made better over time... if the hotside is ported, have them do the wastegate hole and that will help a bit...
All4bSpinnin is offline   Reply With Quote
Old 12-11-2008, 11:13 AM   #14
eatus ravenous
Scooby Specialist
 
Member#: 26068
Join Date: Oct 2002
Chapter/Region: NESIC
Location: north central mass
Default

forget the VF anything unless its a too good to pass up deal ( $$ ) and do it right off the bat . keep in mind that any VF cant be rebuilt ( easily ) and the ones that can are not cost effective to do so . go with a basic TD05 18 G and all will be well
eatus ravenous is offline   Reply With Quote
Old 12-15-2008, 06:07 PM   #15
wrxman420
Scooby Newbie
 
Member#: 120007
Join Date: Jul 2006
Chapter/Region: MWSOC
Location: Milwaukee WI
Vehicle:
2003 PPG, STG 3+
Am I in Reverse?

Default

The VF48 is a poor mans 18g. It can be had for less $ and puts out similar #'s.
wrxman420 is offline   Reply With Quote
Old 12-15-2008, 06:26 PM   #16
tux121
Scooby Specialist
 
Member#: 162942
Join Date: Oct 2007
Location: MN
Vehicle:
2006 STi Black&Gold
Stage 2

Default

+16g > vf48
tux121 is offline   Reply With Quote
Old 12-16-2008, 01:45 AM   #17
WR-eX (Honda)
Scooby Newbie
 
Member#: 175141
Join Date: Mar 2008
Chapter/Region: BAIC
Location: socal
Vehicle:
2007 wrb wrx

Default

Quote:
Originally Posted by wrxman420 View Post
The VF48 is a poor mans 18g. It can be had for less $ and puts out similar #'s.
You sure right about that! I got this thing for $400 brand new! I couldn't pass it up. First thing is - I'm broke as hell but want a lil more kick, second - again, I'm broke as hell. No money to upgrade to fmic or injectors. I gotta settle for the minimum for now.
WR-eX (Honda) is offline   Reply With Quote
Old 12-16-2008, 09:44 AM   #18
ThreeEleven
Scooby Specialist
 
Member#: 157894
Join Date: Aug 2007
Chapter/Region: MWSOC
Location: Saint Peters, MO
Vehicle:
2007 WRB WRX
EJ257

Default

Quote:
Originally Posted by wrxman420 View Post
The VF48 is a poor mans 18g. It can be had for less $ and puts out similar #'s.
No. Prove it.
ThreeEleven is offline   Reply With Quote
Old 12-16-2008, 10:59 PM   #19
wrxman420
Scooby Newbie
 
Member#: 120007
Join Date: Jul 2006
Chapter/Region: MWSOC
Location: Milwaukee WI
Vehicle:
2003 PPG, STG 3+
Am I in Reverse?

Default

http://forums.nasioc.com/forums/show....php?t=1478419

http://forums.nasioc.com/forums/show....php?t=1514781

These turbos can be had for 700 Brand new. Even cheaper if you find an 08 sti owner looking to upgrade.
wrxman420 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
swapped older 5 speed into 07 WRX - cruise not functioning Trevor723 Transmission (AT/MT) & Driveline 11 08-31-2009 07:42 AM
Reputable source for jdm transmission? Swapping into 07 wrx q's.. Trevor723 Subaru Conversions 0 02-15-2009 09:13 AM
04 6 speed swap into 02 Wrx with Sti swap drftwell Transmission (AT/MT) & Driveline 28 09-10-2008 09:22 PM
Finished my 07 sti tranny swap into 06 wrx renosubby Transmission (AT/MT) & Driveline 17 12-14-2007 10:04 PM
Need Help!! 07 Sti cluster into 07 WRX JEFFZZ Vancouver Impreza Club Forum -- VIC 0 08-21-2007 01:24 PM


All times are GMT -4. The time now is 10:28 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.