Welcome to the North American Subaru Impreza Owners Club Wednesday October 1, 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 > Subaru Conversions

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 03-29-2010, 10:14 AM   #1
maxpower_454
Scooby Newbie
 
Member#: 88963
Join Date: Jun 2005
Vehicle:
2005 WRX
OBP

Default Thinking about swapping my WRX 2.0l for a 2.5. What's the easiest way?

I have a 05 WRX 2.0l and I hate the turbo lag and short power band. It seems like everything I would need to do to cut down the turbo lag will cost as much as a short/long block swap. If I swapped my short block with a 06+ WRX/STi short block, what else would I need to do to make it run correctly? I assume I should probably put a different turbo on as well if I did but which one?

Everytime someone asks about cutting down on turbo lag someone recommends going ot a 2.5l but I searched and searched and cannot find many detailed threads from people who have done it. Is that because it is a straight swap with a custom tune?
* Registered users of the site do not see these ads.
maxpower_454 is offline   Reply With Quote
Old 03-29-2010, 10:20 AM   #2
maxpower_454
Scooby Newbie
 
Member#: 88963
Join Date: Jun 2005
Vehicle:
2005 WRX
OBP

Default

Ok. I did find this thread: http://www.elementtuning.com/V8%20In...%20Install.htm but that's for an STi. What would be different if I would be installing a 2.5L from a WRX?
maxpower_454 is offline   Reply With Quote
Old 03-30-2010, 04:56 PM   #3
02ej25hybrid
Scooby Newbie
 
Member#: 240322
Join Date: Mar 2010
Default

keep your heads and intake manifold. check out fred beans auto parts, sti longblocks with gasket install kit for 2500 plus shipping. READ HOW TO DO IT YOURSELF. DONT BE A MORON AND TAKE YOUR TIME IF YOU CHOOSE THIS OPTION. new timing belt and 550cc - 750CC {depends on turbo} injectors with opensource tune. keep your stock turbo and upgrade when you get the extra bucks. Also look into a better free flowing exhaust even if its the cheap $100 ebay headers, down pipe, up pipe try for catless and get a force pass on your opensource. when you tune for fuel put the wideband sensor 3 ft from end of exaust, if you have no cats....If cats put it in the downpipe, one that has a 12 o clock location right after the turbo... after tune ONLY when you know your maps and a.f. is good remove wideband. get an 18 or 20g turbo when you upgrade, if not vf39 will work. keep your stock airbox if you want, if not, its just another thing your tuning for. 255 walbro fuel pump as well. Cams at this point will be a good idea. If you have over 70 thousand miles on your heads, have em rebuilt. Theres no sense in putting heads with bad guides that are leaking oil around the valves into your fresh pimpin sti block. my 02 cents..{sense}...common sense..



No matter what you do to your WRX you will always want dccs.

Last edited by 02ej25hybrid; 03-30-2010 at 09:49 PM.
02ej25hybrid is offline   Reply With Quote
Old 04-14-2010, 10:37 PM   #4
Maverick7531
Scooby Newbie
 
Member#: 234291
Join Date: Jan 2010
Chapter/Region: NESIC
Location: Pennsylvania
Vehicle:
2002 WRX - '04 EJ257
w/ ECU & Fuel -'04 5MT

Default

Quote:
Originally Posted by maxpower_454 View Post
I have a 05 WRX 2.0l and I hate the turbo lag and short power band. It seems like everything I would need to do to cut down the turbo lag will cost as much as a short/long block swap. If I swapped my short block with a 06+ WRX/STi short block, what else would I need to do to make it run correctly? I assume I should probably put a different turbo on as well if I did but which one?

Everytime someone asks about cutting down on turbo lag someone recommends going ot a 2.5l but I searched and searched and cannot find many detailed threads from people who have done it. Is that because it is a straight swap with a custom tune?

Ok... I'm really not trying to be an A-S-S, but it seems like you don't have very much turbo knowledge/experience. I only say this because it's common knowledge that the EJ205's with the TD04 Mitsubisi turbos have an awesome rate Spool (VERY LITTLE LAG...) I mean you can hit 17 PSI at 26/800 RPM's... and you even start MAKING boost before 2K RPM's!!! THAT IS ABOUT AS FAST AS TURBOS GET!!!

Once you put an STI motor in, it won't change much... but using the EJ257's stock turbo(The IHI VF-39) it will have more mid/top end power than the TD04, but it won't spool to full boost until like 30/3200 RPM's!

Do a little research, and just look through a bunch of threads... the questions you are asking are out there, and very readily found. Once you are more familiar with Subaru upgrading, and more importantly TURBO cars, you will understand a lot more! I thought I knew a lot at one time... and that was several years into owning my WRX... but I didn't know squat unitl I really started digging into possibilities of Modding my car, and then swapping motors!

Read the NEWBIE Thread, and a lot of the FAQ's... it gives a lot of good info, and there is a part in there about the many different turbos availiable on subaru's. The ones I listed are the main 2 that come on cars you are interested in!
Maverick7531 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
What's the easiest way to check your O2 sensor? BGPunk2001 Off-Topic 44 07-24-2009 02:56 PM
What's the easiest way to search for your own posts? thehalogod Off-Topic 25 05-12-2008 08:30 PM
What's the easiest way to get signal from factory deck? styng88 Car Audio, Video & Security 8 05-06-2005 03:24 PM
What's the easiest way to run cables? ZenerDiode Car Audio, Video & Security 9 02-11-2004 12:40 AM


All times are GMT -4. The time now is 06:22 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.