Welcome to the North American Subaru Impreza Owners Club Wednesday October 17, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L 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 09-19-2005, 08:31 PM   #1
Antonios Kintos
Scooby Newbie
 
Member#: 81122
Join Date: Feb 2005
Chapter/Region: Tri-State
Location: Fort Lee, NJ
Vehicle:
08 STi white

Default can 2.5L sb w/ wrx heads make 330-340 whp

Ok, so that is my whp goal. My plan is 2.5L sti sb with stock wrx heads. 06H 18g or 06H 20g. Now I know I have a better shot at this goal with the 20g but I'm not ruling out the 18g just yet cause it can be upgraded to a 20g.

So, in doing a ton of searching, some say the stock wrx heads can't go past 320 whp. However, others say a set up like this can make over 320 whp.

So does anyone actually have a setup like or similar to my plan.

I was considering cams while the motor is apart but, there not much info on them, they seem to be not much bang for the buck, and some specialists and gurus claim they may prevent a turbo from making its potential.

I also understand its all in the tuning. Install and tuning will be done at Rallispec. So I know I will get quality work.

Opinions anyone? Thanx
* Registered users of the site do not see these ads.
Antonios Kintos is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-19-2005, 09:24 PM   #2
Antonios Kintos
Scooby Newbie
 
Member#: 81122
Join Date: Feb 2005
Chapter/Region: Tri-State
Location: Fort Lee, NJ
Vehicle:
08 STi white

Default

bump.
Antonios Kintos is offline   Reply With Quote
Old 09-19-2005, 09:27 PM   #3
LiquidForce
Scooby Specialist
 
Member#: 12811
Join Date: Nov 2001
Chapter/Region: South East
Location: Roswell Ga
Vehicle:
2002 2.5l Wrx
517whp/516wtq (Stage pi)

Default

Yes it can. My turbo is maxed out, but a 20g would reach your goals quite easily.

http://forums.nasioc.com/forums/showthread.php?t=843648
LiquidForce is offline   Reply With Quote
Old 09-19-2005, 09:30 PM   #4
Antonios Kintos
Scooby Newbie
 
Member#: 81122
Join Date: Feb 2005
Chapter/Region: Tri-State
Location: Fort Lee, NJ
Vehicle:
08 STi white

Default

So I guess its the WI that brought up the numbers that high? For some reason I dont want to get into the complexities of WI.
Antonios Kintos is offline   Reply With Quote
Old 09-19-2005, 09:45 PM   #5
LiquidForce
Scooby Specialist
 
Member#: 12811
Join Date: Nov 2001
Chapter/Region: South East
Location: Roswell Ga
Vehicle:
2002 2.5l Wrx
517whp/516wtq (Stage pi)

Default

With a bigger turbo you can get there without the alcohol injection . The point is the stock heads and stock cams are capable of more than 320 whp. I just needed alcohol injection to get enough out of my smaller turbo. If I had all of my money back I would have gone with a deabolt 20g. A 20g on race gas or alcohol injection would be closer to 400whp.
LiquidForce is offline   Reply With Quote
Old 09-19-2005, 10:32 PM   #6
Antonios Kintos
Scooby Newbie
 
Member#: 81122
Join Date: Feb 2005
Chapter/Region: Tri-State
Location: Fort Lee, NJ
Vehicle:
08 STi white

Default

Ah yes straight from one with proof. I came this close to oredering stg2 crowers, glad a highly reguarded vender convinced me to save my $$$ and use it for a bigger turbo.
Antonios Kintos is offline   Reply With Quote
Old 09-19-2005, 11:49 PM   #7
Antonios Kintos
Scooby Newbie
 
Member#: 81122
Join Date: Feb 2005
Chapter/Region: Tri-State
Location: Fort Lee, NJ
Vehicle:
08 STi white

Default

But wait, why did Unkdave top out at about 310 whp in his thread " now putting Axis stg 2.5 together". I think he p & p'ed all the exhaust ports.
Antonios Kintos is offline   Reply With Quote
Old 09-20-2005, 12:04 AM   #8
west005
Scooby Specialist
 
Member#: 65684
Join Date: Jul 2004
Chapter/Region: South East
Location: Deutschland
Vehicle:
1993 JDM Soarer TT
White on golds

Default

I know a guy with 18G and TXS TMIC stock wrx engine 323whp, you can get 350whp with a SR55 in a wrx!
west005 is offline   Reply With Quote
Old 09-20-2005, 09:00 PM   #9
Antonios Kintos
Scooby Newbie
 
Member#: 81122
Join Date: Feb 2005
Chapter/Region: Tri-State
Location: Fort Lee, NJ
Vehicle:
08 STi white

Default 20g w/ 2.5L sb

I know the 20g is becoming an increasingly popular turbo for the sti. Has any one put a 20g on a 2.5 wrx with stock heads.
Antonios Kintos is offline   Reply With Quote
Old 09-20-2005, 10:16 PM   #10
wuuusaa
Scooby Guru
 
Member#: 92894
Join Date: Aug 2005
Chapter/Region: BAIC
Location: Lane splitting in Cali.
Vehicle:
2015 Wrx

Default

why would u want stock wrx heads why not v7 or v8 heads,they flow much better than usdm wrx's.i think it will be worth while
wuuusaa is offline   Reply With Quote
Old 09-20-2005, 10:20 PM   #11
hockeygm
Scooby Specialist
 
Member#: 80681
Join Date: Jan 2005
Chapter/Region: NESIC
Location: Warwick, RI
Vehicle:
2003 Impreza WRX
Platinum Silver

Default

not to sabotage this thread or anything but what kind of gas mileage are you guys getting with that much power? just curious
hockeygm is offline   Reply With Quote
Old 09-20-2005, 10:27 PM   #12
02WRX03060
Scooby Newbie
 
Member#: 19897
Join Date: Jun 2002
Location: SoCal
Default

......

Last edited by 02WRX03060; 04-14-2006 at 06:14 PM.
02WRX03060 is offline   Reply With Quote
Old 09-20-2005, 11:53 PM   #13
Antonios Kintos
Scooby Newbie
 
Member#: 81122
Join Date: Feb 2005
Chapter/Region: Tri-State
Location: Fort Lee, NJ
Vehicle:
08 STi white

Default

Quote:
Originally Posted by ol'skoolwrx
why would u want stock wrx heads why not v7 or v8 heads,they flow much better than usdm wrx's.i think it will be worth while
Well yes the jdm heads are far better than my stock heads but, its possible to reach my goal with stock wrx heads (330-340 whp).

Also, it would cost me about 3000 to swap in a 2.5L sb, that includes all parts and labor. A set of slightly used jdm heads from IA Performance or another highly reguarded vendor costs about 2000, just for the heads. So thats another reason to stay with stock wrx heads.

As I stated in the first post, I was considering cams but, I've concluded they're not much bang for the buck. The ones I was considering would have run me 1700- 1800 parts and labor.
Antonios Kintos is offline   Reply With Quote
Old 09-21-2005, 12:47 AM   #14
WSSBOARD18
Scooby Newbie
 
Member#: 47964
Join Date: Nov 2003
Location: NORTH BAY, CA
Vehicle:
2003 WRX
WHITE

Default

I am getting the same set up and looking for soem results from others. I have a vf22 2.0l now and am getting a 2.5l with forged internals and want to see what kind of numbers i should expect. I will eventually get a bigger turbo, but for now i am going to use the vf22. what can i expectwith stock wrx heads?
WSSBOARD18 is offline   Reply With Quote
Old 09-21-2005, 08:09 PM   #15
Antonios Kintos
Scooby Newbie
 
Member#: 81122
Join Date: Feb 2005
Chapter/Region: Tri-State
Location: Fort Lee, NJ
Vehicle:
08 STi white

Default

My guess is you'd be right in the 300whp range. With the extra low end torque and less lag, it should even more fun to drive. Keep us posted.
Antonios Kintos is offline   Reply With Quote
Old 09-21-2005, 08:23 PM   #16
dcwrx2
Scooby Specialist
 
Member#: 69005
Join Date: Aug 2004
Location: SoCal
Vehicle:
'04 4EAT Wgn
WRB

Default

Quote:
Originally Posted by hockeygm
not to sabotage this thread or anything but what kind of gas mileage are you guys getting with that much power? just curious
Any inputs?
dcwrx2 is offline   Reply With Quote
Old 09-21-2005, 08:30 PM   #17
west005
Scooby Specialist
 
Member#: 65684
Join Date: Jul 2004
Chapter/Region: South East
Location: Deutschland
Vehicle:
1993 JDM Soarer TT
White on golds

Default

Low boost mine is still good/ normal. The way I drive usually around 10mpg. Around 350whp right now
west005 is offline   Reply With Quote
Old 09-21-2005, 08:44 PM   #18
dcwrx2
Scooby Specialist
 
Member#: 69005
Join Date: Aug 2004
Location: SoCal
Vehicle:
'04 4EAT Wgn
WRB

Default

10mpg?!
Have you tried using cruise control and run a tank of gas on roughly 70mph all the time? I know it means torturing to you, but I would like to know the answer (or I'd appreciated if someone else can fill in the answer).
dcwrx2 is offline   Reply With Quote
Old 09-21-2005, 10:39 PM   #19
perkowskiforpope
Scooby Newbie
 
Member#: 50618
Join Date: Dec 2003
Chapter/Region: NESIC
Location: RI/MA
Vehicle:
2004 Crawford S2
FPgreen PSM Wagon

Default

Im running a crawford s2 block which is a 2.5l STI block with forged pistons and its making 280whp and 325 torque on a ktr's dyno dynamics with a vf22 turbo at 20psi. Its using stock wrx heads, however the pistons are designed to be used with wrx heads, so if your planning on upgrading to 2.5 why not go crawford?
perkowskiforpope is offline   Reply With Quote
Old 09-21-2005, 11:39 PM   #20
InfamousDX
Scooby Guru
 
Member#: 25413
Join Date: Sep 2002
Chapter/Region: Tri-State
Location: North NJ
Default

A regular ej205 stock block stock heads will make 330-340whp... heck I made 320 with fouled plugs (less timing).
InfamousDX is offline   Reply With Quote
Old 09-22-2005, 12:23 PM   #21
WSSBOARD18
Scooby Newbie
 
Member#: 47964
Join Date: Nov 2003
Location: NORTH BAY, CA
Vehicle:
2003 WRX
WHITE

Default

Quote:
Originally Posted by InfamousDX
A regular ej205 stock block stock heads will make 330-340whp... heck I made 320 with fouled plugs (less timing).
On what type of fuel and on what dyno. A dyno dynamics is a very low reading dyno. 270whp on a dd would be over 300whp on another dyno. Also you will not get the torque out of a 2.0l that you will on a 2.5l.
WSSBOARD18 is offline   Reply With Quote
Old 09-22-2005, 01:39 PM   #22
RiftsWRX
Scooby Guru
 
Member#: 6124
Join Date: Apr 2001
Chapter/Region: MWSOC
Location: Glendale Hts, IL, USA
Vehicle:
2000 NFR AP1 S2000
'07 Honda FIT sport (5MT)

Default

Quote:
Originally Posted by Antonios Kintos
Ok, so that is my whp goal. My plan is 2.5L sti sb with stock wrx heads. 06H 18g or 06H 20g. Now I know I have a better shot at this goal with the 20g but I'm not ruling out the 18g just yet cause it can be upgraded to a 20g.

So, in doing a ton of searching, some say the stock wrx heads can't go past 320 whp. However, others say a set up like this can make over 320 whp.

So does anyone actually have a setup like or similar to my plan.

I was considering cams while the motor is apart but, there not much info on them, they seem to be not much bang for the buck, and some specialists and gurus claim they may prevent a turbo from making its potential.

I also understand its all in the tuning. Install and tuning will be done at Rallispec. So I know I will get quality work.

Opinions anyone? Thanx
With the proper setup, the EJ205 head will make a lot more then 320 WHP.

That's been proven time and time again.

Jorge (RiftsWRX)
www.ProjectWRX.com
RiftsWRX is offline   Reply With Quote
Old 09-22-2005, 02:01 PM   #23
InfamousDX
Scooby Guru
 
Member#: 25413
Join Date: Sep 2002
Chapter/Region: Tri-State
Location: North NJ
Default

Quote:
Originally Posted by WSSBOARD18
On what type of fuel and on what dyno. A dyno dynamics is a very low reading dyno. 270whp on a dd would be over 300whp on another dyno. Also you will not get the torque out of a 2.0l that you will on a 2.5l.
On a dyno jet...w hich is why this post isn't that great but wahtever. It was a dyno jet where my friend's stock sti put down 232whp. This was on 93. And you definitely wouldn't get the torque of the 2.5 but I never said you would. Also... my other friend's green'd WRX with headwork (ferrea valvetrain, stock cams) did 363whp on pump 93 at turbotrix's dyno and then 405whp on c16. But nothing's relative here... just adding fuel to the misinformation fire.
InfamousDX is offline   Reply With Quote
Old 09-22-2005, 03:15 PM   #24
dcwrx2
Scooby Specialist
 
Member#: 69005
Join Date: Aug 2004
Location: SoCal
Vehicle:
'04 4EAT Wgn
WRB

Default

Speaking of sb, which 2.5L sb you guys think it is good for WRX 2.0 -> 2.5 proj? Can you sort them out according to "Cost vs Performance"? How about quality of each too?

OEM USDM STi 2.5 sb (~$1700)
OEM JDM 2.5 sb (cost varies)
Cobb tuner-series 2.5 sb ($3050)
Crawford s2 2.5sb ($2249)
Axis Stg2 2.5sb ($2650)
dcwrx2 is offline   Reply With Quote
Old 09-22-2005, 03:42 PM   #25
Lawrence
Scooby Newbie
 
Member#: 82518
Join Date: Mar 2005
Chapter/Region: Tri-State
Location: Eastern and western NY
Vehicle:
2005 wrx
Aspen White

Default

Quote:
Originally Posted by dcwrx2
Speaking of sb, which 2.5L sb you guys think it is good for WRX 2.0 -> 2.5 proj? Can you sort them out according to "Cost vs Performance"? How about quality of each too?

OEM USDM STi 2.5 sb (~$1700)
OEM JDM 2.5 sb (cost varies)
Cobb tuner-series 2.5 sb ($3050)
Crawford s2 2.5sb ($2249)
Axis Stg2 2.5sb ($2650)
I agree with dcwrx, i would go with either the cobb uner or axis power shortblocks. thogh they are still using the same STI forged material but these short blocks are in some cases balanced.

here is the summerized specification of the my list.
http://www.clubwrx.net/forums/showthread.php?t=112875

Also, thought he wrx head is good for 320whp but as you are adding a alchohol injection you will end up gong to the limit of the air flow on the head. you would be better off doing a port and polish.
Lawrence 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
2.5L STi shorblock + WRX heads w/ TD04 Udonboy Proven Power Bragging 34 05-31-2007 05:35 PM
Requirements to install 2.0L head onto 2.5L SB nomorem3 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 4 07-25-2006 03:58 AM
need new plugs for 2.5l swap w/ wrx heads? gimmewar Subaru Conversions 8 05-01-2006 02:26 PM
Built 2.5l Motor W/wrx Heads Turbo Set Up ...... And More julezamazing212 Private 'For Sale' Classifieds 61 02-17-2006 11:45 PM
Can 2.5L DOHC heads and block be machined if warped? johndingk2 Normally Aspirated Powertrain 4 01-31-2005 07:58 PM

All times are GMT -4. The time now is 10:17 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.