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 2.0L 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.







* 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 05-09-2013, 11:16 PM   #126
Fierysun
Scooby Guru
 
Member#: 82745
Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2005 Subaru STI
2003 EJ207 S204 Wagon

Default

Quote:
Originally Posted by brew02wrx View Post
i stated interest in the tomei m7760 earlier in this thread, wondering if you could give an in depth review or assessment of this turbo on a 205??
Here's my Tomei 7760 thread.

http://forums.nasioc.com/forums/show...ighlight=tomei
* Registered users of the site do not see these ads.
Fierysun is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 05-09-2013, 11:26 PM   #127
street carp
Scooby Specialist
 
Member#: 216768
Join Date: Jul 2009
Chapter/Region: NWIC
Location: TACOMA
Vehicle:
2016 STI
HYPER BLUE

Default

Quote:
Originally Posted by The Phenx View Post

Part quality was amazing, and they hold warranty overseaas.
252,105 miles as of this morning... 220k of that on the mods.

I think I am the last Prodrive tuned wrx left in the US.. lol...

damn thats a lot of miles on those mods! are you running the 6 speed?
street carp is offline   Reply With Quote
Old 05-10-2013, 10:08 AM   #128
The Phenx
Scooby Specialist
 
Member#: 95823
Join Date: Sep 2005
Chapter/Region: MAIC
Vehicle:
2003 Imprezza Wrx
WRC BLUE

Default

Quote:
Originally Posted by street carp View Post
damn thats a lot of miles on those mods! are you running the 6 speed?
Nope. Original 5 speed. 4th clutch. Still works and shifts great.

Unlink a lot of folks I know how to launch and not destroy my car.

If I was going to get back into road course racing the 6spd would be the 1st mod I did, but after 3 back surgeries, I gotta say I am probably staying retired.
The Phenx is offline   Reply With Quote
Old 05-10-2013, 10:11 AM   #129
The Phenx
Scooby Specialist
 
Member#: 95823
Join Date: Sep 2005
Chapter/Region: MAIC
Vehicle:
2003 Imprezza Wrx
WRC BLUE

Default

Quote:
Originally Posted by Fierysun View Post
Very nice results.
The Phenx is offline   Reply With Quote
Old 05-11-2013, 12:59 AM   #130
street carp
Scooby Specialist
 
Member#: 216768
Join Date: Jul 2009
Chapter/Region: NWIC
Location: TACOMA
Vehicle:
2016 STI
HYPER BLUE

Default

Quote:
Originally Posted by The Phenx View Post
Nope. Original 5 speed. 4th clutch. Still works and shifts great.

Unlink a lot of folks I know how to launch and not destroy my car.

If I was going to get back into road course racing the 6spd would be the 1st mod I did, but after 3 back surgeries, I gotta say I am probably staying retired.
my hat is off to you sir. i'm really surprised your engine and tranny have been going that long. then again, it is the stock turbo so the car was designed to work with it and i'm sure the guys at prodrive knew a little bit about what they were doing. i'm kinda jealous...
street carp is offline   Reply With Quote
Old 05-11-2013, 03:47 PM   #131
cosseywrx
Scooby Specialist
 
Member#: 276443
Join Date: Mar 2011
Chapter/Region: TXIC
Location: Abilene, TX
Vehicle:
2005 2.1 stroker WRX
OBP

Default

Rare choice. Greddy 18g. Low boost of 16psi 300whp. Stock 108k 5spd. Built motor tho
cosseywrx is offline   Reply With Quote
Old 05-12-2013, 02:14 PM   #132
ezil71
Scooby Specialist
 
Member#: 207118
Join Date: Mar 2009
Chapter/Region: South East
Location: Tallahassee, FL
Vehicle:
2003 Wrx Wagon

Default

Quote:
Originally Posted by Fierysun View Post
I agree with Concillian.

I've gone through 6x turbo swaps along with different combinations of components on my ej205 to find the best spool to power. What i fought was any turbo's that i tried that was larger than an 20g TD05 8cm, the spool rate went down the toilet. The best turbo (both pump and e85) of all my swaps for the ej205 is still the Tomei 7760. Also, the close ratio 6mt improves driveability substantially over the 5mt in all driving conditions.

Thanks. It's very helpful to hear from someone with experience on that many turbos on the 2.0.

I haven't heard a lot on the 7760.

It sounds comparable to the 16g xt?

I'll take a closer look at the 7760 for sure.
ezil71 is offline   Reply With Quote
Old 05-12-2013, 02:17 PM   #133
ezil71
Scooby Specialist
 
Member#: 207118
Join Date: Mar 2009
Chapter/Region: South East
Location: Tallahassee, FL
Vehicle:
2003 Wrx Wagon

Default

Quote:
Originally Posted by Concillian View Post
IMO the stock 2.0L engine has issues with off-boost torque. Off boost torque is simply not high enough for the car to be comfortable. It has this problem even on the TD04. One of the following is HIGHLY recommended as a real solution regardless of turbo

- Shorter tires. 3-5% shorter makes a very substantial difference in how the car drives off boost. You wouldn't think such a small difference will change how the car drives significantly, but trust me, it will.
- EJ207 swap for AVCS
- 6-speed transmission or higher final drive 5-speed
- 79mm stroke. 2.1L stroker engine or 2.5L hybrid swap
- high octane fuel + higher compression ratio.

Everyone has issues with the off-boost torque. The geometry of the engine is revvy and low torque. Match that with heads that give up around 6k and an 8.5:1 compression ratio, and you have an engine that sucks to drive around town. There are band-aids. Addressing root causes is expensive. Shorter tires is the cheapest way to help.

Take it from someone with a 207 swap and a 4.44 final tranny. If you put in the work ($$$) the car can be joyous to drive with 2.0L. But it ain't cheap to get there. If you're not addressing the root causes, and aren't happy with it, just stop modding and prepare to sell the car and get a platform you'll be happy with from the start. It's not cheap to do it right.
This should be a sticky.

Nice post.
ezil71 is offline   Reply With Quote
Old 05-12-2013, 02:44 PM   #134
cosseywrx
Scooby Specialist
 
Member#: 276443
Join Date: Mar 2011
Chapter/Region: TXIC
Location: Abilene, TX
Vehicle:
2005 2.1 stroker WRX
OBP

Default

I hit full boost at 3400 on a perrin fmic. Stays all the way to redline.
cosseywrx is offline   Reply With Quote
Old 05-12-2013, 04:53 PM   #135
brew02wrx
Scooby Specialist
 
Member#: 259970
Join Date: Oct 2010
Chapter/Region: Tri-State
Location: brewster, NY
Vehicle:
2002 wrx cobb stg2+
psm proper fitment

Default

Quote:
Originally Posted by Fierysun View Post
im really glad i asked about this turbo, your results are extremely impressive compared to other options out there. Thanks a bunch for the thread link.
brew02wrx is offline   Reply With Quote
Old 05-12-2013, 08:04 PM   #136
emozer
Scooby Newbie
 
Member#: 355200
Join Date: May 2013
Chapter/Region: TXIC
Location: Brazil
Vehicle:
2004 Impreza WRX
Black Pearl

Default

Quote:
Originally Posted by ogboot View Post


Here's my little WIP. I could have smoothed out the stg2 tune I'm sure, but that's water under the bridge at this point . I'm still working on pushing the torque curve to the left, seeing what I can get out of it total. It looks to be spooling up as expected, a few hundred rpms less than the TD04. This is a Kinugawa T518z-16g, basically a Big 16G.

Thanks to Brad and vDyno BTW, really enjoy comparing logs graphically rather than just poring over the spreadsheets. Makes it easy for stuff like this.
Hey ogboot,

I like pretty much how your power curve looks. Would you mind share your AFR and Timing maps? I'm just wondering if if they are to far from what I have once we use the same turbo.

Cheers,
Ed
emozer is offline   Reply With Quote
Old 05-12-2013, 08:10 PM   #137
Fierysun
Scooby Guru
 
Member#: 82745
Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2005 Subaru STI
2003 EJ207 S204 Wagon

Default

Quote:
Originally Posted by ezil71 View Post
Thanks. It's very helpful to hear from someone with experience on that many turbos on the 2.0.

I haven't heard a lot on the 7760.

It sounds comparable to the 16g xt?

I'll take a closer look at the 7760 for sure.
It spools like a 16gxt, but size wise it's similiar to a small 20g td05 8cm with proprietary wheels.
Fierysun is offline   Reply With Quote
Old 05-13-2013, 05:44 PM   #138
ezil71
Scooby Specialist
 
Member#: 207118
Join Date: Mar 2009
Chapter/Region: South East
Location: Tallahassee, FL
Vehicle:
2003 Wrx Wagon

Default

Quote:
Originally Posted by Fierysun View Post
It spools like a 16gxt, but size wise it's similiar to a small 20g td05 8cm with proprietary wheels.

I'd have to have a conservative tune to save my transmission, but it is on my list of options for sure.
ezil71 is offline   Reply With Quote
Old 05-14-2013, 10:47 AM   #139
The Phenx
Scooby Specialist
 
Member#: 95823
Join Date: Sep 2005
Chapter/Region: MAIC
Vehicle:
2003 Imprezza Wrx
WRC BLUE

Default

Quote:
Originally Posted by ezil71 View Post
I'd have to have a conservative tune to save my transmission, but it is on my list of options for sure.
Running a lightened flywheel and the right fluid will help more than anything.

Shock loading kills transmissions.

#1 Tons of inertial from a heavy flywheel when coming off clutch too fast/hard/high rpm. No side step at 6k.

#2 Run a combo of gear oil and RedLine lightweight Shockproof... its called that for a reason.

#3 Learn how to feather & double clutch properly
The Phenx is offline   Reply With Quote
Old 06-06-2013, 12:21 PM   #140
bmalo
Scooby Newbie
 
Member#: 118930
Join Date: Jun 2006
Chapter/Region: MWSOC
Location: Cleveland, OH
Vehicle:
1998 WRX'd Forester
White

Default

I hope I'm not harping on this too much but Kinugawa offers a td04HL 19t with a billet wheel upgrade. That would probably be very interesting for us 2.0L guys.


link
bmalo is offline   Reply With Quote
Old 06-07-2013, 03:07 PM   #141
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Default

I'm going to add this to the discussion...

Here are my Airboy road dyno plots comparing my old setup (EJ205 / 18G 7cm on E85 / original 02-05 transmission) to my current setup (EJ207 / Full Race Borg Warner EFR 6758 kit on E85 / Forester XT transmission 4.44 final drive with same 1-5 ratios as the 02-05 WRX tranny)



The charts look completely identical below 3500 RPM. However, the car feels completely different driving around town at those RPMs. Completely... Night and day different... Way better with the current config.

Originally I made the mistake of looking at charts and trying to draw conclusions about part throttle response based on spool RPM and low RPM torque on the dyno chart. Forget trying to do that. It doesn't work. There is very, very little information on a dyno chart that will tell you about how a car drives at anything other than full throttle.

Make a choice in turbo based on full throttle needs, Do NOT try to pull part throttle info assumptions based on a WOT dyno chart... doesn't work.
Concillian is offline   Reply With Quote
Old 06-07-2013, 03:11 PM   #142
wrxlaunch
Scooby Specialist
 
Member#: 181298
Join Date: May 2008
Chapter/Region: MAIC
Location: MAIC
Vehicle:
2019 KUV 21
Crystal White

Default

Quote:
Originally Posted by Concillian View Post
I'm going to add this to the discussion...

Here are is my road dyno plots comparing my old setup (EJ205 / 18G 7cm on E85 / original transmission) to my current setup (EJ207 / Full Race Borg Warner EFR 6758 kit on E85 / Forester XT 4.44 transmission)

The charts look completely identical below 3500 RPM. However, the car feels completely different driving around town. Completely... like night and day different... way, way better with the current config.

Originally I made the mistake of looking at charts and trying to draw conclusions about part throttle response based on spool RPM and low RPM torque on the dyno chart. Forget trying to do that. There is very, very little information on a dyno chart that will tell you about how a car drives at anything other than full throttle.

Make a choice in turbo based on full throttle needs, Do NOT try to pull part throttle info assumptions based on a WOT dyno chart... doesn't work.
Did u Only splash e85 before spool? Should have made more... 207 must feel awesome tho
wrxlaunch is offline   Reply With Quote
Old 06-07-2013, 03:51 PM   #143
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Default

Quote:
Originally Posted by wrxlaunch View Post
Did u Only splash e85 before spool? Should have made more... 207 must feel awesome tho
What do you mean "splash E85 before spool". I do not follow.

I should have made more what? If you're talking about Torque / HP, you missed the entire point. The point I was making has nothing to do with the numbers in the chart. And no, I should not have made more, there was no room on fuel. What kind of numbers on Airboy do you expect to see from maxed ID1000s on E85?
Concillian is offline   Reply With Quote
Old 06-07-2013, 04:33 PM   #144
wrxlaunch
Scooby Specialist
 
Member#: 181298
Join Date: May 2008
Chapter/Region: MAIC
Location: MAIC
Vehicle:
2019 KUV 21
Crystal White

Default

Check pm sir
wrxlaunch 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 06:13 AM.


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.