Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 08-16-2012, 10:08 AM   #1
HOSTILEDUTY
Scooby Newbie
 
Member#: 311218
Join Date: Feb 2012
Chapter/Region: South East
Location: Arkansas
Vehicle:
2006 Impreza Wrx TR
Steel Gray Metallic

Default 06 wrx tr build help

Starting to get bored with my current setup so time for more power. It's my dd and I take it to the drags once or twice a year but besides that it's pretty much babied (except for the occasional spirited drive on the Arkansas curvy roads.) I'll list what is on the car, what I've already bought and what I'm lookin at purchasing. I'm looking for at least 300 awhp but would like to be at 350 awhp and not really wanting to go bigger injectors or mess with fuel pump yet. I've read and reread the unibombers manifesto and this is what I've come up with.

Currently on the car: borla catback, k&n typhoon (I know stock is better but it was already on there when I bought it), and Cobb 91 octane stage1 tune.

Already purchased: uel headers, up pipe, and downpipe.

This is what I'm looking at purchasing: ihi vf48 turbo (probably have it ported and polished), a larger tmic (possibly a CSS), upgraded intercooler hose, and an PDX etune (I'm not even close to any pro tuners).

Will this get me to my goal? Thanks for any advice!
* Registered users of the site do not see these ads.
HOSTILEDUTY is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-16-2012, 11:04 AM   #2
jbulls93
Scooby Newbie
 
Member#: 315840
Join Date: Apr 2012
Chapter/Region: Tri-State
Location: New York
Vehicle:
2000 2.5rs

Default

Are you running a stock BCS? If so I believe you will need an aftermarket (manual or electronic) boost controller to safely run the mods you listed. As for whether you will reach your goals, my setup is similar (ej257, larger tmic, uppipe, downpipe/ catless TBE, open source tuned, turbo inlet, grimmspeed bcs, short ram spt intake, 565cc sti injectors, dw300 lph fuel pump, vf39) and my tuner estimates 300-320 whp/tq once my tune is complete. Not a concrete figure but hopefully it gives you an idea of where you may lie.
jbulls93 is offline   Reply With Quote
Old 08-16-2012, 11:59 AM   #3
HOSTILEDUTY
Scooby Newbie
 
Member#: 311218
Join Date: Feb 2012
Chapter/Region: South East
Location: Arkansas
Vehicle:
2006 Impreza Wrx TR
Steel Gray Metallic

Default

Wouldn't that be covered by my tune? Or will the stock one just not handle it?
HOSTILEDUTY is offline   Reply With Quote
Old 08-16-2012, 01:02 PM   #4
HinshawWRX
Medium Frank
Moderator
 
Member#: 140114
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Common Sense, VA
Vehicle:
2020 Subaru
Outback

Default

Your stock BCS will do just fine, but an aftermarket 3 port will give you more ease of mind for boost control.

I would get a downpipe and flash Stage 2 and see how you feel with it. Then go from there.
HinshawWRX is offline   Reply With Quote
Old 08-16-2012, 01:43 PM   #5
HOSTILEDUTY
Scooby Newbie
 
Member#: 311218
Join Date: Feb 2012
Chapter/Region: South East
Location: Arkansas
Vehicle:
2006 Impreza Wrx TR
Steel Gray Metallic

Default

Quote:
Originally Posted by HinshawWRX
I would get a downpipe and flash Stage 2 and see how you feel with it. Then go from there.
Why? It would probably just feel like I turned my a/c off lol I swear that thing robs a ton of power anyways. I've got most the money now if I don't spend it now my wife will.
HOSTILEDUTY is offline   Reply With Quote
Old 08-16-2012, 06:10 PM   #6
aslese
Scooby Newbie
 
Member#: 278720
Join Date: Apr 2011
Location: Wilmington, NC
Vehicle:
2006 Subaru WRX TR
OBP

Default

What made you decide you want a vf48? When you say 300whp and 350whp on what dyno?
aslese is offline   Reply With Quote
Old 08-16-2012, 09:52 PM   #7
HinshawWRX
Medium Frank
Moderator
 
Member#: 140114
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Common Sense, VA
Vehicle:
2020 Subaru
Outback

Default

Quote:
Originally Posted by HOSTILEDUTY View Post
Why? It would probably just feel like I turned my a/c off lol I swear that thing robs a ton of power anyways. I've got most the money now if I don't spend it now my wife will.
The A/c does not "rob" that much power from the car.

And why? Because you already have the parts, install them and see how you like it. And the up pipe is somewhat worthless since you are already catless stock.

You can also read the countless threads on this subject to get a better idea.
HinshawWRX is offline   Reply With Quote
Old 08-16-2012, 10:40 PM   #8
HOSTILEDUTY
Scooby Newbie
 
Member#: 311218
Join Date: Feb 2012
Chapter/Region: South East
Location: Arkansas
Vehicle:
2006 Impreza Wrx TR
Steel Gray Metallic

Default

Quote:
Originally Posted by HinshawWRX

The A/c does not "rob" that much power from the car.

And why? Because you already have the parts, install them and see how you like it. And the up pipe is somewhat worthless since you are already catless stock.

You can also read the countless threads on this subject to get a better idea.
It takes away enough to notice but that's besides the point.
I'm here for goal of 300+ awhp not install a couple of parts and see if I like it.
Ya I know this but since it was included with my headers it don't matter.
I have searched and searched but not many builds with the vf48. What I have read is how I've put together this combo up top in the op. I'm just wondering if I've missed anything important. Thanks.
HOSTILEDUTY is offline   Reply With Quote
Old 08-17-2012, 02:09 AM   #9
aslese
Scooby Newbie
 
Member#: 278720
Join Date: Apr 2011
Location: Wilmington, NC
Vehicle:
2006 Subaru WRX TR
OBP

Default

You will not be able to hit 300+ awhp on an accurate reading mustang dyno with your stock fuel system. I suggest a dyno tune from a reputable tuner. Btw be careful with your tranny. Launching it often will result in a broken tranny.
aslese is offline   Reply With Quote
Old 08-17-2012, 08:10 AM   #10
HOSTILEDUTY
Scooby Newbie
 
Member#: 311218
Join Date: Feb 2012
Chapter/Region: South East
Location: Arkansas
Vehicle:
2006 Impreza Wrx TR
Steel Gray Metallic

Default

Quote:
Originally Posted by aslese
You will not be able to hit 300+ awhp on an accurate reading mustang dyno with your stock fuel system. I suggest a dyno tune from a reputable tuner. Btw be careful with your tranny. Launching it often will result in a broken tranny.
Thank you. Ya I've been looking at a DW fuel pump an maybe modded stock injectors but I know very little about messing with fuel systems. Thats why I put that on my op but if I have to I'll get it.
HOSTILEDUTY is offline   Reply With Quote
Old 08-17-2012, 08:19 AM   #11
HOSTILEDUTY
Scooby Newbie
 
Member#: 311218
Join Date: Feb 2012
Chapter/Region: South East
Location: Arkansas
Vehicle:
2006 Impreza Wrx TR
Steel Gray Metallic

Default

Another question. The downpipe I have is for 02-05 can I just have a muffler shop modify the mid pipe or go ahead and just get one for an 06?
HOSTILEDUTY is offline   Reply With Quote
Old 08-17-2012, 01:18 PM   #12
sc00ter
Scooby Guru
 
Member#: 117767
Join Date: Jun 2006
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
2014 Audi S4
DP Stage 2 (~420whp)

Default

Quote:
Originally Posted by HOSTILEDUTY View Post
Another question. The downpipe I have is for 02-05 can I just have a muffler shop modify the mid pipe or go ahead and just get one for an 06?
I'm pretty sure the DP will just bolt right up from 02-07. I lent my '07 stock DP to a local with an '05 STI to pass emissions and it bolted up to his car with no issues.

Also, I just posted this in ProfessWRX's thread which is very similar to yours...

I was looking for a good turbo upgrade to get me to the 300whp range since Stage 2 wasn't cutting it for me @ 5200ft above sea level. After doing my research and talking to my tuner I ended up with the following setup

- COBB 3" catted TBE
- Perrin turbo inlet
- SPT intake
- Walbro 255 fuel pump
- DW 750cc injectors
- Grimmspeed 3 port EBCS
- STI TMIC & Splitter/bellows (2007)
- VF48 (off a 2012 w/10k miles)
- COBB Accessport with custom dyno tunes for 19psi / 17psi / 15psi

While I could have hit 300whp with a "lesser" setup I wanted to get it right the first time.

I would definitely upgrade the fuel pump with the turbo upgrade. The whole install takes like 30 minutes. I had never messed with a fuel pump in my life before installing the Walbro and I still found it to be a breeze.
sc00ter is offline   Reply With Quote
Old 08-17-2012, 02:03 PM   #13
HOSTILEDUTY
Scooby Newbie
 
Member#: 311218
Join Date: Feb 2012
Chapter/Region: South East
Location: Arkansas
Vehicle:
2006 Impreza Wrx TR
Steel Gray Metallic

Default

Quote:
Originally Posted by sc00ter

I'm pretty sure the DP will just bolt right up from 02-07. I lent my '07 stock DP to a local with an '05 STI to pass emissions and it bolted up to his car with no issues.

Also, I just posted this in ProfessWRX's thread which is very similar to yours...

I was looking for a good turbo upgrade to get me to the 300whp range since Stage 2 wasn't cutting it for me @ 5200ft above sea level. After doing my research and talking to my tuner I ended up with the following setup

- COBB 3" catted TBE
- Perrin turbo inlet
- SPT intake
- Walbro 255 fuel pump
- DW 750cc injectors
- Grimmspeed 3 port EBCS
- STI TMIC & Splitter/bellows (2007)
- VF48 (off a 2012 w/10k miles)
- COBB Accessport with custom dyno tunes for 19psi / 17psi / 15psi

While I could have hit 300whp with a "lesser" setup I wanted to get it right the first time.

I would definitely upgrade the fuel pump with the turbo upgrade. The whole install takes like 30 minutes. I had never messed with a fuel pump in my life before installing the Walbro and I still found it to be a breeze.
It's the injectors I'm "scared" to tackle myself may have a shop do them for me. I'm prone to breaking stuff and costing myself a lot more $ and headaches. What hp did you end up with?
HOSTILEDUTY is offline   Reply With Quote
Old 08-17-2012, 03:54 PM   #14
aslese
Scooby Newbie
 
Member#: 278720
Join Date: Apr 2011
Location: Wilmington, NC
Vehicle:
2006 Subaru WRX TR
OBP

Default

This is my set-up on my 2006 WRX TR

Exhaust:
TurboXS TBE
Perrin Uppipe

Engine:
Deadbolt 18g turbo
38mm Tial Wastegate
KS Tech Intake
STI Intercooler

Engine Management:
Cobb AP
Protuned
Grimmspeed EBCS

Fuel:
850cc Injectors
Walbro Fuel pump

I make around 290awhp on a low reading mustang dyno and 330awhp on a dynojet.
aslese is offline   Reply With Quote
Old 08-17-2012, 03:58 PM   #15
aslese
Scooby Newbie
 
Member#: 278720
Join Date: Apr 2011
Location: Wilmington, NC
Vehicle:
2006 Subaru WRX TR
OBP

Default

Quote:
Originally Posted by sc00ter View Post
I'm pretty sure the DP will just bolt right up from 02-07.
Yeah from 02-07 they should be interchangeable.

Also I do not recommend modding injectors, some will argue with me, but your stock ones are worth anywhere from $200 to $300. Sell them or get the core for them and buy some 750cc, 850cc, or 1000cc. If you are near a place that has e85 I would buy 1000cc injectors get a custom tune on e85 and then you would have 350whp on a vf48.

Last edited by aslese; 08-17-2012 at 04:04 PM.
aslese is offline   Reply With Quote
Old 08-17-2012, 05:04 PM   #16
stevejones19
Scooby Specialist
 
Member#: 275250
Join Date: Feb 2011
Chapter/Region: NWIC
Location: Lacey, WA
Vehicle:
2006 WRX
White

Default

Quote:
Originally Posted by aslese

Yeah from 02-07 they should be interchangeable.

Also I do not recommend modding injectors, some will argue with me, but your stock ones are worth anywhere from $200 to $300. Sell them or get the core for them and buy some 750cc, 850cc, or 1000cc. If you are near a place that has e85 I would buy 1000cc injectors get a custom tune on e85 and then you would have 350whp on a vf48.

The shop that installed my vf48 sent out my injectors to be modded. I'm running them 25k miles later with no issues. I don't know what they flow though, I forgot to get the paperwork.


And I actually just read the first post, so ill continue talking, since I have what you are looking at already.


Basically depending on what dunk your on, you can make 300 with that set-up or not really be close. My setup is as follows:
-vf48
-Modded injectors
-tbe
-Grimmspeed Boost controller
-Larger TMIC
-CAI

I think that's it. But that setup put down 270whp/320tq on 92 gas. But I know from experiences it is as quick/little quicker than stg 2 Sti. And to me, I don't mind having the lower numbers, because its always a nicer surprise to someone who isn't expecting that much of a kick.

Last edited by stevejones19; 08-17-2012 at 05:15 PM.
stevejones19 is offline   Reply With Quote
Old 08-17-2012, 05:23 PM   #17
ToyotaMike
Scooby Newbie
 
Member#: 286007
Join Date: Jun 2011
Chapter/Region: Tri-State
Location: Long Island NY
Vehicle:
1993 Skyline GTST
Bayside blue

Default

I would say no to hitting 300whp with what you have listed. I hit 290whp/350wtq on a Dyno dynamics Dyno with a vf39, catless 3" dp, apexi exhaust, EBCS, sti tmic, walbro pump, turbo inlet. I wanted to be able to say " I have 300whp" so I went back and did P&L up pipe, tial 38 mm external, 1000cc injectors and I was hitting 315 on 93 and 350/416 on e85.

Now I swapped a 6 speed in with a light weight fly wheel and my tuner now has his own mustang Dyno so it's going back in for a retune after I get my ETS tmic, turbo blanket and hopefully a set of headers.
ToyotaMike is offline   Reply With Quote
Old 08-17-2012, 06:03 PM   #18
aslese
Scooby Newbie
 
Member#: 278720
Join Date: Apr 2011
Location: Wilmington, NC
Vehicle:
2006 Subaru WRX TR
OBP

Default

At the end of the day you should find a reputable tuner for a custom tune and ask them what they suggest.

Btw since people are throwing around dyno names above 350whp on a low reading mustang dyno is pretty close to too much for stock internals while 350whp on a higher reading dyno like some dynojets is fine. So when your making a goal you should decide on which type of dyno.
aslese is offline   Reply With Quote
Old 08-17-2012, 06:33 PM   #19
HinshawWRX
Medium Frank
Moderator
 
Member#: 140114
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Common Sense, VA
Vehicle:
2020 Subaru
Outback

Default

All 02-07 exhaust, turbo's, intakes, etc are interchangeable. Hell even the coil packs work on both 2.0 and 2.5L motors.
HinshawWRX is offline   Reply With Quote
Old 08-19-2012, 02:29 AM   #20
HOSTILEDUTY
Scooby Newbie
 
Member#: 311218
Join Date: Feb 2012
Chapter/Region: South East
Location: Arkansas
Vehicle:
2006 Impreza Wrx TR
Steel Gray Metallic

Default

Updated list:
Fuel pump: DW 300?
Injectors: DW 650?
Turbo: VF48 Port-n-polish?
Tmic: bigger one?
Electronic boost controller?
Downpipe
Up pipe
Uel Header
Get an etune (for now)
HOSTILEDUTY is offline   Reply With Quote
Old 08-19-2012, 11:53 AM   #21
HinshawWRX
Medium Frank
Moderator
 
Member#: 140114
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Common Sense, VA
Vehicle:
2020 Subaru
Outback

Default

I would go with a slightly higher injector if you EVER plan on going bigger.
HinshawWRX is offline   Reply With Quote
Old 08-19-2012, 08:52 PM   #22
ToyotaMike
Scooby Newbie
 
Member#: 286007
Join Date: Jun 2011
Chapter/Region: Tri-State
Location: Long Island NY
Vehicle:
1993 Skyline GTST
Bayside blue

Default

Doing a 650 size injector is a waste, the car stock has 565s. I would do at least 750.

An STI TMIC would be a nice addition to go along with the parts for sure. Having the turbo PnP will make for a faster spool as far as I know. Grimmspeed ebc for sure. If I'm not mistaken the up pipe on an 06 is not catted...could be wrong but on my 07 it wasn't.

I am looking at doing a header before my next tune and plan to stick with UEL because he EL equipped cars I have heard in person do not sound good IMO. You loose the subi rumble however, the EL will give you more power. I was just talking to my tuner this weekend and he is trying to convince me to go EL. He said the car he just tuned with them sounded more like an EVO.
ToyotaMike is offline   Reply With Quote
Old 08-19-2012, 09:00 PM   #23
lagodcm
Scooby Specialist
 
Member#: 164038
Join Date: Nov 2007
Chapter/Region: International
Location: Guam
Vehicle:
2013 WRX with too
many parts too list

Default

Quote:
Originally Posted by HOSTILEDUTY View Post
Updated list:
Fuel pump: DW 300?
Injectors: DW 650?
Turbo: VF48 Port-n-polish?
Tmic: bigger one?
Electronic boost controller?
Downpipe
Up pipe
Uel Header
Get an etune (for now)
Save your money on the UEL header and up pipe and get an 18g.
lagodcm is offline   Reply With Quote
Old 08-19-2012, 09:04 PM   #24
lagodcm
Scooby Specialist
 
Member#: 164038
Join Date: Nov 2007
Chapter/Region: International
Location: Guam
Vehicle:
2013 WRX with too
many parts too list

Default

You wont be happy with the vf48. No balls after 5500 rpm. Or at least it feels like it.....
lagodcm is offline   Reply With Quote
Old 08-19-2012, 10:07 PM   #25
HinshawWRX
Medium Frank
Moderator
 
Member#: 140114
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Common Sense, VA
Vehicle:
2020 Subaru
Outback

Default

Quote:
Originally Posted by ToyotaMike View Post
Doing a 650 size injector is a waste, the car stock has 565s. I would do at least 750.

An STI TMIC would be a nice addition to go along with the parts for sure. Having the turbo PnP will make for a faster spool as far as I know. Grimmspeed ebc for sure. If I'm not mistaken the up pipe on an 06 is not catted...could be wrong but on my 07 it wasn't.

I am looking at doing a header before my next tune and plan to stick with UEL because he EL equipped cars I have heard in person do not sound good IMO. You loose the subi rumble however, the EL will give you more power. I was just talking to my tuner this weekend and he is trying to convince me to go EL. He said the car he just tuned with them sounded more like an EVO.
06+ WRX up's are not catted.
HinshawWRX 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

All times are GMT -4. The time now is 04:47 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.