Welcome to the North American Subaru Impreza Owners Club Friday April 18, 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 > Built Motor Discussion

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 06-12-2008, 09:36 AM   #1
Acroduster
Scooby Newbie
 
Member#: 160636
Join Date: Oct 2007
Location: Bewick, PA
Question Heads for 22T and 300hp

I'm building an EJ22T to get 300 crank hp as low as possible in rpms. I plan to use a 2.5 crank and the rods and pistons that are needed with it. {I know what is needed from the archives}. I have heads from a 1999 2.5 and understand they are good flowing heads, however, I noticed they are heavier than the stock 22t heads. Is it necessary or desirable to use the 2.5 heads instead of stock? I want to keep everything as light as possible while still getting the hp requirements.
Thanks!
Ben
* Registered users of the site do not see these ads.
Acroduster is offline   Reply With Quote
Old 06-13-2008, 10:49 AM   #2
FuJi K
Scooby Guru
 
Member#: 3687
Join Date: Jan 2001
Chapter/Region: MWSOC
Location: St. Paul, MN
Vehicle:
MY99 GF4 JDM 6spd
NF Performance

Default

When I dynoed my STOCK EJ22T motor with WRX TD04L, TMIC, headerback exhaust, 15psi of boost, I made 244wtrq @ 3600rpms, but made 178whp@5600rpms. Dispite the low HP numbers, It made LOADS of torque and would spin the wheels off the line no problem.

The '99 SOHC 2.5L heads are decent. The intake side flows VERY similar to the 2.5L DOHC, but #'s are just a few under the 2.5L DOHC. However the exhaust side doesn't have a lot of valve guide support so it flows more out the exhaust than the 2.5L DOHC.

What is this going into and what engine management are you using?
I have a WRX swap using OpenECU running ported WRX heads on EJ22T shortblock and an EVO3-16G-8cm turbo. I make about 300whp.
FuJi K is offline   Reply With Quote
Old 06-13-2008, 10:58 AM   #3
reddevil
Scooby Guru
 
Member#: 64673
Join Date: Jun 2004
Chapter/Region: NWIC
Location: portland
Vehicle:
1990 Legacy wagon
goes 12.387 @ 116.5

Default

ANY new heads than the stock ej22t heads will be heaps better.
reddevil is offline   Reply With Quote
Old 06-13-2008, 11:25 AM   #4
Acroduster
Scooby Newbie
 
Member#: 160636
Join Date: Oct 2007
Location: Bewick, PA
Default

Hi FuJi K,
The engine is going in an off-road vehicle with no catalytic converter. I'm going to use SDS management from Racetech http://www.sdsefi.com/tech.html
I'm happy to see you make 300whp. I should have no problem getting 300chp and lots of torque.
Thanks!
Ben

Last edited by Acroduster; 06-14-2008 at 08:29 PM. Reason: scared everyone
Acroduster is offline   Reply With Quote
Old 06-16-2008, 03:22 PM   #5
FuJi K
Scooby Guru
 
Member#: 3687
Join Date: Jan 2001
Chapter/Region: MWSOC
Location: St. Paul, MN
Vehicle:
MY99 GF4 JDM 6spd
NF Performance

Default

So I take it this is going into an Impreza??
One reason I ask this is because if you're doing the '99 heads onto the 22T shortblock, which manifold are you going to run and what car it's going to go into.

I chose the WRX swap because then I can run its manifold and sensors with the engine management; OpenECU/Cobb AP/UTEC etc. This means I have to run WRX heads, or STi heads depending. Now I can bolt up the WRX manifold onto the 2.5L SOHC heads as well. It's just that the CAM sensor may be different and where it picks up the signal may be in a different spot so the car may not run right.

So I'm assuming you're going to be running these 2.5L SOHC heads with the 2.5L SOHC harness using that SDS for your EM?? Just making sure you're running the heads that'll work with the harness and EM that you're choosing to run.
FuJi K is offline   Reply With Quote
Old 06-17-2008, 11:06 AM   #6
Acroduster
Scooby Newbie
 
Member#: 160636
Join Date: Oct 2007
Location: Bewick, PA
Default

Hi FuJi K,
This is not going in a Subaru and it will never be driven on the street.
The SDS is stand alone with its own harness and will only require a crank angle and O2 sensors. I will fabricate headers and I'm thinking about trying a Rotrex supercharger.
After pulling the 22t heads and comparing the valves with the 2.5, the only choice is the 2.5 SOHC heads.
Thanks!
Ben
Acroduster 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
G/I Built 22t and more! ThEShoW Engine/Power/Exhaust 6 11-09-2008 09:58 PM
pair of dohc heads for sale and a couple other things mybluesubi Engine/Power/Exhaust 1 12-18-2006 06:01 PM
22 NA head on 22t block Turbo GC4 Normally Aspirated with bolt-on Forced Induction Powertrain 22 07-01-2006 03:17 PM
Head and neck restraints for riders and drivers. Bonzo Off-Topic 13 04-28-2006 02:16 PM
diffrence between the factory 2.5 210hp Forester XT, 250hp LegacyGT and 300hp STI eng navyissuesuby Factory 2.5L Turbo Powertrain 24 03-04-2005 01:59 AM


All times are GMT -4. The time now is 05:05 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.