Welcome to the North American Subaru Impreza Owners Club Sunday February 1, 2015
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 2.0L 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 07-09-2004, 09:10 PM   #1
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default Whats a good turbo for a sti ver 8 motor?

I am thinking about getting a ver 8 motor (non twinscroll) and adding a turbo.

So what is a good turbo for the motor? I don't need a stupid big one, but something significantly larger than the stock one, I use the car to turn, so I don't want a purely on/off nature.

What are my options?

Also, what are my options for engine management and what would you guys suggest?

Thanks
* Registered users of the site do not see these ads.
Capt Crunch is offline   Reply With Quote
Old 07-09-2004, 09:19 PM   #2
cronic
Scooby Guru
 
Member#: 9749
Join Date: Aug 2001
Chapter/Region: SWIC
Vehicle:
-

Default Re: Whats a good turbo for a sti ver 8 motor?

Quote:
Originally posted by Capt Crunch
I am thinking about getting a ver 8 motor (non twinscroll) and adding a turbo.

So what is a good turbo for the motor? I don't need a stupid big one, but something significantly larger than the stock one, I use the car to turn, so I don't want a purely on/off nature.

What are my options?

Also, what are my options for engine management and what would you guys suggest?

Thanks
So is this a Euro or AUs motor? Get an 18g and a utec or reflash and you should be happy..
cronic is online now   Reply With Quote
Old 07-09-2004, 11:03 PM   #3
annointed
Scooby Specialist
 
Member#: 5960
Join Date: Apr 2001
Chapter/Region: Tri-State
Location: Atlantic City, NJ
Vehicle:
FXT 11.6@118 93 oct
NSX 450 whp SC'd (93 oct)

Default

Quote:
Originally posted by cronic
So is this a Euro or AUs motor? Get an 18g and a utec or reflash and you should be happy..
I don't know about you, but both bigger mitsu turbos I've had have been very hard hitting "on-off" turbos

jdm EJ20G small 16g comes on like a ton of bricks in my '94.

The FP18g is the same in my '02. However, the VF30 I had before it came on in much smoother fashion, so you may want to stay w/a VF turbo for their more linear power delivery, as much as linear power bores me
annointed is offline   Reply With Quote
Old 07-09-2004, 11:23 PM   #4
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default

so what VF series turbo is bigger than the one it comes stock? Any one that fits USDM WRXs should fit the JDM ver 8 motor correct? VF22?
Capt Crunch is offline   Reply With Quote
Old 07-09-2004, 11:25 PM   #5
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default

Also what tuning should I use? I have a UTEC now, but I'm unsure if it can handle AVCS, and also if I recall it turns on after a certain load, leaving the ECU to handle normal driving. However I need to have the car work on 93 octane, so would I need something else?
Capt Crunch is offline   Reply With Quote
Old 07-10-2004, 12:40 AM   #6
ERaab212
Scooby Specialist
 
Member#: 18466
Join Date: May 2002
Chapter/Region: Tri-State
Location: being pulled over......
Vehicle:
2003 GT35r Evo VIII
10.402@138

Default

Quote:
Originally posted by annointed
I don't know about you, but both bigger mitsu turbos I've had have been very hard hitting "on-off" turbos

jdm EJ20G small 16g comes on like a ton of bricks in my '94.

The FP18g is the same in my '02. However, the VF30 I had before it came on in much smoother fashion, so you may want to stay w/a VF turbo for their more linear power delivery, as much as linear power bores me
This is Cronic BTW at my friends house

You also dont have avcs Avcs is going to get a little of that low end grunt back.. I think the 18g on that motor is a good choice..

Is this a JDM wrx motor or JDM STI?

Capt: If it is a JDM V8 Sti it comes with a vf36 or 37 depending on spec C or not, if it is a Euro i believe it comes with a vf35 which is a fast spooling little guy..

ANy wrx turbo will fit the V8 as long as you change all the twinscroll parts back to stock wrx parts.. If you were more detailed about what motor exactly you arer getting and also what it comes with i could be of more help..

As for the UTEC, can you tell me what revision you have?(not software but the revision board it is) If it is a revision 6 or newer it will let the AVCS run but cant control it (yet ) I run a rev 6 utec in my car with v7 motor and AVCS ON~
ERaab212 is offline   Reply With Quote
Old 07-10-2004, 12:44 AM   #7
StevieD
Scooby Specialist
 
Member#: 14029
Join Date: Jan 2002
Location: Texas
Default

As stated before... you can't go wrong with a VF36/7
StevieD is offline   Reply With Quote
Old 07-10-2004, 10:22 AM   #8
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default

Quote:
Originally posted by ERaab212
Capt: If it is a JDM V8 Sti it comes with a vf36 or 37 depending on spec C or not, if it is a Euro i believe it comes with a vf35 which is a fast spooling little guy..

ANy wrx turbo will fit the V8 as long as you change all the twinscroll parts back to stock wrx parts.. If you were more detailed about what motor exactly you arer getting and also what it comes with i could be of more help..

As for the UTEC, can you tell me what revision you have?(not software but the revision board it is) If it is a revision 6 or newer it will let the AVCS run but cant control it (yet ) I run a rev 6 utec in my car with v7 motor and AVCS ON~
I got my UTEC a long time ago, I don't think it can handle AVCS. The motor will be JDM ver 8, I don't think it will be spec C. Since I am thinking of replacing the turbo, I intend to get one of the early ver8 that did not have twinscroll. Then I can use a WRX turbo and turboback.

I really want the car to fly... maybe mid to high 12s to give an idea? I don't really want to get another UTEC if possible, my stage 2 WRX shudders at 40% throttle at 3500 rpm when it switches from the ECU to the UTEC. This is after Phil of Element Tuning tuned it. I want something that can make the car feel smooth like stock.

So my options seem to be ECUtek and Phils new Hydra ECU. Things are starting to get expensive. What are the pro/cons of both?

Also, I'm not willing to get anything larger than a 18g, would I need any supporting mods other than engine management?
Capt Crunch is offline   Reply With Quote
Old 07-10-2004, 10:32 AM   #9
cronic
Scooby Guru
 
Member#: 9749
Join Date: Aug 2001
Chapter/Region: SWIC
Vehicle:
-

Default

Quote:
Originally posted by Capt Crunch
I got my UTEC a long time ago, I don't think it can handle AVCS. The motor will be JDM ver 8, I don't think it will be spec C. Since I am thinking of replacing the turbo, I intend to get one of the early ver8 that did not have twinscroll. Then I can use a WRX turbo and turboback.

I really want the car to fly... maybe mid to high 12s to give an idea? I don't really want to get another UTEC if possible, my stage 2 WRX shudders at 40% throttle at 3500 rpm when it switches from the ECU to the UTEC. This is after Phil of Element Tuning tuned it. I want something that can make the car feel smooth like stock.

So my options seem to be ECUtek and Phils new Hydra ECU. Things are starting to get expensive. What are the pro/cons of both?

Also, I'm not willing to get anything larger than a 18g, would I need any supporting mods other than engine management?
All JDM v8's are twinscroll..


Mid to high 12's is easy.. Just get Sell your utec and get a used revision 6 or newer or a JDM/AUS model utec..

You shouldnt be feeling that hesitation with the utec's new software.

I think you need to do some more research before you undertake this kind of swap..
cronic is online now   Reply With Quote
Old 07-10-2004, 11:11 AM   #10
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default

Quote:
Originally posted by cronic
All JDM v8's are twinscroll..


Mid to high 12's is easy.. Just get Sell your utec and get a used revision 6 or newer or a JDM/AUS model utec..

You shouldnt be feeling that hesitation with the utec's new software.

I think you need to do some more research before you undertake this kind of swap..
I'm going off what Kingpin has told me, and they said that there were some version 8s that did not have twinscroll.

So what you are saying is that engine management alone will get me into the the 12s? I suppose I should live with it, coming from a stage 2 I guess it should be enough, but I've been spoiled by riding in Phils beast of a car.
Capt Crunch is offline   Reply With Quote
Old 07-10-2004, 11:16 AM   #11
LatentWagen
Scooby Guru
 
Member#: 50315
Join Date: Dec 2003
Chapter/Region: Tri-State
Location: New York
Vehicle:
0508 Saabaru & specB
Stage: Maintenance

Default

twinscroll would be so much more fun tho... siiiick torque.
LatentWagen is online now   Reply With Quote
Old 07-10-2004, 11:23 AM   #12
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default

Quote:
Originally posted by midnite_wrex
twinscroll would be so much more fun tho... siiiick torque.
Right, this is all dependent on if I want to replace the turbo. If I do, I don't want twinscroll because I would have to replace everything from the headers back. If I don't then there is no reason not to get twinscoll, except that I'm in love with the boxer rumble.

How fast is a JDM ver 8 twinscroll? Compared to a USDM v8?
Capt Crunch is offline   Reply With Quote
Old 07-10-2004, 11:37 AM   #13
LatentWagen
Scooby Guru
 
Member#: 50315
Join Date: Dec 2003
Chapter/Region: Tri-State
Location: New York
Vehicle:
0508 Saabaru & specB
Stage: Maintenance

Default

the boxer rumble sounds lovely... but even exhaust flow vs pulses sounds like much more power
LatentWagen is online now   Reply With Quote
Old 07-10-2004, 01:26 PM   #14
jblaine
Scooby Guru
 
Member#: 8512
Join Date: Jul 2001
Chapter/Region: South East
Location: St. Pete, FL
Vehicle:
2002 WRX chassis...
stage-infinity.com

Default

Quote:
Originally posted by ERaab212
You also dont have avcs Avcs is going to get a little of that low end grunt back.
Quote:
Originally posted by Capt Crunch
if I recall it turns on after a certain load, leaving the ECU to handle normal driving.
That's how I recall it as well -- that it won't give you any new low-end grunt at all. The cam timing is already optimized for low-end drivability.
jblaine is offline   Reply With Quote
Old 07-10-2004, 02:04 PM   #15
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default

hypothetically, if I got a pe1818, what supporting modifications would I need?

I'm thinking of using ecutek.
Capt Crunch is offline   Reply With Quote
Old 07-10-2004, 02:39 PM   #16
cronic
Scooby Guru
 
Member#: 9749
Join Date: Aug 2001
Chapter/Region: SWIC
Vehicle:
-

Default

Quote:
Originally posted by jblaine
That's how I recall it as well -- that it won't give you any new low-end grunt at all. The cam timing is already optimized for low-end drivability.
Quote:
Originally posted by AZScoobie


The main purpose of AVCS is for low end and high end power as well as mileage and emissions. The top end power increase is because AVCS helps bottom end and midrange so a more agressive Cam can be run. Type RA's come with 258 duration cams. In comparison to the WRX's 218. This is a huge, huge difference in cams.. Without AVCS you would have a lack of low end and a very peaky power band with those cams... Just as my Type RA does now with the AVCS not working still....

HTH

CT
cronic is online now   Reply With Quote
Old 07-10-2004, 02:42 PM   #17
jblaine
Scooby Guru
 
Member#: 8512
Join Date: Jul 2001
Chapter/Region: South East
Location: St. Pete, FL
Vehicle:
2002 WRX chassis...
stage-infinity.com

Default

Interesting, I seem to remember a post of Clark's or Jeff Sponaugle's that showed AVCS only kicking in late in the powerband.
jblaine is offline   Reply With Quote
Old 07-10-2004, 02:54 PM   #18
cronic
Scooby Guru
 
Member#: 9749
Join Date: Aug 2001
Chapter/Region: SWIC
Vehicle:
-

Default

Quote:
Originally posted by jblaine
Interesting, I seem to remember a post of Clark's or Jeff Sponaugle's that showed AVCS only kicking in late in the powerband.
No AVCS stops up top and only works till 5500(not sure the exact rpm) or so.. I have logs of my car i can post logging AVCS advance..
cronic is online now   Reply With Quote
Old 07-10-2004, 03:03 PM   #19
cronic
Scooby Guru
 
Member#: 9749
Join Date: Aug 2001
Chapter/Region: SWIC
Vehicle:
-

Default

cronic is online now   Reply With Quote
Old 07-10-2004, 09:47 PM   #20
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default

Quote:
Originally posted by Capt Crunch
hypothetically, if I got a pe1818, what supporting modifications would I need?

I'm thinking of using ecutek.
Sorry to repeat myself but I want to make sure I know everything before I make such a large purchace.
Capt Crunch is offline   Reply With Quote
Old 07-10-2004, 09:53 PM   #21
ImprezaRSfan!
Scooby Specialist
 
Member#: 13520
Join Date: Dec 2001
Chapter/Region: MAIC
Location: Springfield, VA
Vehicle:
99rs ej207 spec-c
its for sale

Default

are u just buying a v.8 longblock? Or a complete engine. If its complete engine then keep the twinscroll stuff.

with jdm ecu's u need the aus utec instead of usdm utec.

Putting a PE1818 on a jdm v.8 isint any different from the wrx u have now. It might spool faster becuase of avcs.

u woudlnt need injectors since u have 565cc pink sti injectors with the engine. Fuel pump upgrade u would need.
ImprezaRSfan! is offline   Reply With Quote
Old 07-10-2004, 09:55 PM   #22
jblaine
Scooby Guru
 
Member#: 8512
Join Date: Jul 2001
Chapter/Region: South East
Location: St. Pete, FL
Vehicle:
2002 WRX chassis...
stage-infinity.com

Default

Well shut my pie hole. Interesting.
jblaine is offline   Reply With Quote
Old 07-10-2004, 11:05 PM   #23
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default

Quote:
Originally posted by ImprezaRSfan!
Putting a PE1818 on a jdm v.8 isint any different from the wrx u have now. It might spool faster becuase of avcs.
But if the motor was twinscroll, then I wouldn't be able to use the turbo, if I did, i would have to replace everything from headers back. That's costly.
Capt Crunch is offline   Reply With Quote
Old 07-11-2004, 12:00 AM   #24
cronic
Scooby Guru
 
Member#: 9749
Join Date: Aug 2001
Chapter/Region: SWIC
Vehicle:
-

Default

Quote:
Originally posted by ImprezaRSfan!


with jdm ecu's u need the aus utec instead of usdm utec.

Wrong! Like i have said 5 times in this thread, and Clark has said over 100 times all you need is a REV 6 or newer UTEC..

Quote:
Originally posted by Capt Crunch


But if the motor was twinscroll, then I wouldn't be able to use the turbo, if I did, i would have to replace everything from headers back. That's costly.
If you buy the motor complete it will have everything you need(headers,turbo,up,dp,etc) Then you can run the 36/37 and be happy.. Honestly for your modest power goals that is the setup for you man.. You will have awesome boost responce and make good power.. Then if later down the road you decide to change up then sell off all the twin scroll parts(they are worth a good chunk of change) and get a new set-up.. Like i said for your goals the twinscroll seems ideal..

Dave-
cronic is online now   Reply With Quote
Old 07-11-2004, 09:40 AM   #25
Capt Crunch
Scooby Guru
 
Member#: 10852
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Cleveland / UMD College Park
Vehicle:
Then : JDM Ver 7 STi
Now : E46 M3 / MKVI GTI

Default

Quote:
Originally posted by cronic
If you buy the motor complete it will have everything you need(headers,turbo,up,dp,etc) Then you can run the 36/37 and be happy.. Honestly for your modest power goals that is the setup for you man.. You will have awesome boost responce and make good power.. Then if later down the road you decide to change up then sell off all the twin scroll parts(they are worth a good chunk of change) and get a new set-up.. Like i said for your goals the twinscroll seems ideal..

Dave-
Ok, so a rev 6 UTEC is what I need. Couple things:

1 - It's my understanding that the UTEC lets the ECU control the car until I push the car to a certain load and then it takes over. If I remember correctly JDM motors do not run on 93 octane. The UTEC could handle this above a certain load, but not below it. But does it matter? I guess that under a certain load octane doesn't really matter.

2 - What kind of power can I expect from this setup? Estimate whp and 1/4 times. I would like to be noticably faster than a USDM sti. I don't know why, I just do.

Thats all I can think of, thanks for the help guys!
Capt Crunch 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
FS CA: JD STi Ver. 8 Seats, 02 WRX Seats, 02 MoMo Wheel, JDM Ver.8 STi Gauge Cluster ViperWRX Interior/Dressup/Audio & Security 144 04-14-2010 06:20 PM
what is the code for an sti version 8 motor? subyguy1 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 4 08-18-2006 12:15 AM
Whats a good price for this STI... plz read Boltz General Community 23 07-04-2005 05:29 AM
VA--- FOR SALE sti ver 8 wing replica 2002 MBP trbowrx Mid Atlantic Impreza Club -- MAIC 1 03-10-2005 03:52 PM
good turbo for stock jdm ver 7 sti motor? Capt Crunch Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 41 10-03-2004 04:49 PM


All times are GMT -4. The time now is 08:47 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.