Welcome to the North American Subaru Impreza Owners Club Wednesday October 22, 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 > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L 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 06-10-2006, 08:40 AM   #1
AVOjapan
Vendor
 
Member#: 71938
Join Date: Oct 2004
Location: Tokyo
Vehicle:
2004 BL Legacy GT
Regal Blue

Default AVO bb twinscroll update

Testing update 2006:06:10

We have successfully fitted and tested the bolt-on (for JDM) AVO BB twinscroll turbocharger on a JDM Impreza STI fitted with a built 2.5-liter short block, Cosworth heads, full 3" exhaust system and Autronic. Basically all necessary components for power generation have been fitted or updated. By 3500rpm it is producing 1bar of boost, and reaches peak torque at 4000rpm. This setup is producing 404whp at 1.4 bar of boost on the dyno, and 55kg/m of torque. This translates to roughly 492hp at the crank and 391ft/lbs of torque.

This dyno reads a bit low because of two factors, excessive heat/exhaust build-up in the room, and not enough load on the dyno. On the road, we reached 1.45 bar of boost in second gear, and 1.6 bar of boost in the higher gears. That's good for a touch more ponies...

We still have a ways to go towards dialing the turbo and autronic settings in completely, but it is looking quite promising so far.

Cheers,
Paul Hansen

http://www.avoturbo.com/forum/viewtopic.php?t=7 <- watch for updates here
* Registered users of the site do not see these ads.

Last edited by AVOjapan; 06-12-2006 at 11:45 PM.
AVOjapan is offline   Reply With Quote
Old 06-10-2006, 11:45 AM   #2
keaniegenie
Scooby Specialist
 
Member#: 94494
Join Date: Aug 2005
Chapter/Region: NWIC
Location: Seattle
Vehicle:
2005 Element 92x
Black

Default

Sounds like GT30R type power with faster spool.

Super interested!
keaniegenie is offline   Reply With Quote
Old 06-10-2006, 12:27 PM   #3
SilverSurfer04STi
Scooby Specialist
 
Member#: 71542
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Midwest
Vehicle:
2013 WRB BRZ

Default

Sounds VERY promising.

The dyno numbers sound a tad low, but you offered valid explanations as to why they appear slightly low. Also, less power goes further if the power band is fat and that one sounds nice and fat.

Looking forward to more info on this new product. In particular, what are the other turbo specs besides it being BB and twin scroll (hopefully you will release general turbo info to the public)? That pic in the posted link looks delicious.
SilverSurfer04STi is offline   Reply With Quote
Old 06-10-2006, 12:55 PM   #4
keaniegenie
Scooby Specialist
 
Member#: 94494
Join Date: Aug 2005
Chapter/Region: NWIC
Location: Seattle
Vehicle:
2005 Element 92x
Black

Default

Quote:
Originally Posted by SilverSurfer04STi
Sounds VERY promising.

The dyno numbers sound a tad low, but you offered valid explanations as to why they appear slightly low. Also, less power goes further if the power band is fat and that one sounds nice and fat.

Looking forward to more info on this new product. In particular, what are the other turbo specs besides it being BB and twin scroll (hopefully you will release general turbo info to the public)? That pic in the posted link looks delicious.
Those numbers almost make me want to get one! Knowing AVO, it's probably pretty expensive though.

Is this kit rotated?
keaniegenie is offline   Reply With Quote
Old 06-10-2006, 01:56 PM   #5
ShaggyGT
*** Banned ***
 
Member#: 19221
Join Date: May 2002
Chapter/Region: South East
Location: Jacksonville, FL
Vehicle:
2005 Legacy GT (STi)
UR35R/Rotated Intake Mani

Default

http://www.avosubaru.com/photos/twin...avo_ts_002.jpg

Uhhh... No, it is NOT a rotated kit. That turbo will only work with the JDM Version 8 STi twinscroll manifold or an aftermarket twinscroll manifold for the JDM Version 8 STi. Stock turbo is either a VF36 or VF37. The only upgrade there used to be wasthe Zerosports Twinscroll turbo upgrade or Power Enterprise's PE1825.

-Matt
ShaggyGT is offline   Reply With Quote
Old 06-10-2006, 03:51 PM   #6
SilverSurfer04STi
Scooby Specialist
 
Member#: 71542
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Midwest
Vehicle:
2013 WRB BRZ

Default

Nice to have another twin scroll option now though. That makes:
AVO Twin scroll BB (JDM config)
PE1825 (JDM config)
VF36 or VF37 (JDM config)
GT32 w/42 or 51 lb/min comp wheel (GPMoto or Crawford setup - though not sure Crawford has a true twin scroll uppipe available yet)

I think there is also a twin scroll of the GT40, but I'm not including that since it is too big for most folk's purposes.
SilverSurfer04STi is offline   Reply With Quote
Old 06-10-2006, 06:58 PM   #7
AVOjapan
Vendor
 
Member#: 71938
Join Date: Oct 2004
Location: Tokyo
Vehicle:
2004 BL Legacy GT
Regal Blue

Default

Yes, sorry I didn't clarify - due to our move into Japan, one of our priorities was to develop bolt-on bb turbocharger upgrades for the JDM Impreza STI's, and that necessitated a twinscroll. It's been rather hard, as the twinscrolls are much more difficult to build than the standard turbochargers. We've overcome all the difficulties, though, and now we are into final testing - longevity has been going on for a while on a shop engine, for instance.

I'll try to keep you guys updated here as much as possible, while our forum will have the latest information posted as well (sometimes in Japanese, tho...). Understandably, it's not quite a bolt-on solution for the American cars, but once we have the turbocharger available on the market, we'll also provide full conversion kits along with the turbo information.

Oh, and the run mentioned initially was on pump gas, though Japanese high-octane, so take the figures as a "street" tune, something we believe will stay together for more than a few years.

Cheers,

Paul Hansen
www.avoturboworld.com | www.sevenphotos.com
AVOjapan is offline   Reply With Quote
Old 06-10-2006, 07:41 PM   #8
SilverSurfer04STi
Scooby Specialist
 
Member#: 71542
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Midwest
Vehicle:
2013 WRB BRZ

Default

Duly noted about the fuel and thanks for clarifying that. That was another question I was waiting for info on, but I didn't want to bombard you with bunches of questions. So, is regular japanese pump gas fuel equivalent (approximately) to 98 octane in USA?

I'm very excited about this kit. I finally have my car sorted in the manner that satisifies me (with a bolt on 20G turbo) so I won't be switching things on this car anytime soon. However, if your kit would have been readily available at the time I was looking for turbos, I would have jumped all over it. That said, if I buy a second subaru, there is a very, very high probability I will be purchasing a twin scroll setup like this.
SilverSurfer04STi is offline   Reply With Quote
Old 06-10-2006, 07:45 PM   #9
Phil Jr.
Scooby Specialist
 
Member#: 62221
Join Date: May 2004
Chapter/Region: Tri-State
Location: Philly, PA
Default

any price estimate for the US market?
Phil Jr. is offline   Reply With Quote
Old 06-10-2006, 07:54 PM   #10
AVOjapan
Vendor
 
Member#: 71938
Join Date: Oct 2004
Location: Tokyo
Vehicle:
2004 BL Legacy GT
Regal Blue

Default

SS04, I believe that our high-octane is more equivelant to 94 in the states - better than the 93, but not *that* much better. I wish it was...

Phil, not at this moment. We are still working outt the final pricing.

Cheers,

Paul Hansen
www.avoturboworld.com | www.sevenphotos.com
AVOjapan is offline   Reply With Quote
Old 06-10-2006, 10:01 PM   #11
keaniegenie
Scooby Specialist
 
Member#: 94494
Join Date: Aug 2005
Chapter/Region: NWIC
Location: Seattle
Vehicle:
2005 Element 92x
Black

Default

Quote:
Originally Posted by AVOjapan
SS04, I believe that our high-octane is more equivelant to 94 in the states - better than the 93, but not *that* much better. I wish it was...

Phil, not at this moment. We are still working outt the final pricing.

Cheers,

Paul Hansen
www.avoturboworld.com | www.sevenphotos.com

For this turbo to hit full boost by 4k and have those hp numbers, it must spool wicked fast.

Any dyno charts?
keaniegenie is offline   Reply With Quote
Old 06-11-2006, 06:49 AM   #12
Kotir
Scooby Specialist
 
Member#: 17300
Join Date: Apr 2002
Chapter/Region: NWIC
Location: Eugene, OR
Vehicle:
'93 Impreza L Wagon
JDM Ver8 STi swap

Default

Excited for sure.

If funds allow me I'll be all over this when it comes out.

I dunno if I can go back to the normal Subaru sound now I'm addicted to Twinscroll...

When does it spool on a JDM 2.0?



-Tim
Kotir is offline   Reply With Quote
Old 06-11-2006, 10:52 PM   #13
AVOjapan
Vendor
 
Member#: 71938
Join Date: Oct 2004
Location: Tokyo
Vehicle:
2004 BL Legacy GT
Regal Blue

Default

Added in a datalog from a 5th gear run on the expressway here:
http://www.avoturbo.com/forum/viewtopic.php?t=7

Cheers,

Paul Hansen
www.avoturboworld.com | www.sevenphotos.com
AVOjapan is offline   Reply With Quote
Old 06-12-2006, 01:14 AM   #14
fragment
Scooby Specialist
 
Member#: 8050
Join Date: Jul 2001
Chapter/Region: W. Canada
Location: Bugeye EJ207 - T3T04S
Vehicle:
2007 Wagon VF36

Default

Shoot, I just decided that I was going to sell my VF36 setup and go rotated GT30. As soon as I make up my mind, new options get thrown into the mix.

Interested in what you'd see on a Ver8 EJ207. Maybe I could be a test subject?
fragment is offline   Reply With Quote
Old 06-12-2006, 01:55 AM   #15
sumfoo1
Scooby Specialist
 
Member#: 82146
Join Date: Mar 2005
Chapter/Region: South East
Location: Raleigh, NC (Brier Creek)
Vehicle:
2005 Legacy GT
OBP

Default

kg-meters?

is that like newton-meters/ 9.81?

i've never seen that used as a torque measurement
sumfoo1 is offline   Reply With Quote
Old 06-12-2006, 02:03 AM   #16
AVOjapan
Vendor
 
Member#: 71938
Join Date: Oct 2004
Location: Tokyo
Vehicle:
2004 BL Legacy GT
Regal Blue

Default

It's unique to Japan. It's slowly moving over to nm instead, but it'll take time.

Cheers,

Paul Hansen
www.avoturboworld.com | www.sevenphotos.com
AVOjapan is offline   Reply With Quote
Old 06-12-2006, 09:36 AM   #17
s203.22b
Scooby Newbie
 
Member#: 113970
Join Date: May 2006
Chapter/Region: MAIC
Location: MD
Vehicle:
2005 STi WRB
2001 2.5RS AW

Default

Quote:
Originally Posted by SilverSurfer04STi
Nice to have another twin scroll option now though. That makes:
AVO Twin scroll BB (JDM config)
PE1825 (JDM config)
VF36 or VF37 (JDM config)
GT32 w/42 or 51 lb/min comp wheel (GPMoto or Crawford setup - though not sure Crawford has a true twin scroll uppipe available yet)

I think there is also a twin scroll of the GT40, but I'm not including that since it is too big for most folk's purposes.
there's also the twin scroll GT30R and GT35R made by ATP Turbo.
s203.22b is offline   Reply With Quote
Old 06-12-2006, 12:32 PM   #18
SilverSurfer04STi
Scooby Specialist
 
Member#: 71542
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Midwest
Vehicle:
2013 WRB BRZ

Default

Just checked those out. Are those fairly new? Was not aware of that until you mentioned it.
SilverSurfer04STi is offline   Reply With Quote
Old 06-12-2006, 12:57 PM   #19
s203.22b
Scooby Newbie
 
Member#: 113970
Join Date: May 2006
Chapter/Region: MAIC
Location: MD
Vehicle:
2005 STi WRB
2001 2.5RS AW

Default

i only found out about them a couple of weeks ago. they updated their website in april, so i think they're new. the turbine housing has the same A/R ratio (0.78) as the GT32 without internal wastegate, so they may have found a way to adapt that housing for use with the GT30R and GT35R compressor sides.
s203.22b is offline   Reply With Quote
Old 06-12-2006, 03:06 PM   #20
teh sash
Scooby Specialist
 
Member#: 79329
Join Date: Jan 2005
Chapter/Region: SCIC
Location: omgdontknow
Default

looks great, looking forward for more info...
teh sash is offline   Reply With Quote
Old 06-12-2006, 06:09 PM   #21
SilverSurfer04STi
Scooby Specialist
 
Member#: 71542
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Midwest
Vehicle:
2013 WRB BRZ

Default

Me too. Figures all this twin scroll stuff starts hoppin right when I'm considering my engine "done"...
SilverSurfer04STi is offline   Reply With Quote
Old 06-12-2006, 10:23 PM   #22
Pakin
Scooby Specialist
 
Member#: 17315
Join Date: Apr 2002
Chapter/Region: International
Location: Date Line Denies F-22s
Vehicle:
MY95 Impreza 207C
MY05 Forester 257X

Default

Neatttt!

Looking forward to the updates

-paK +41
Pakin is offline   Reply With Quote
Old 06-12-2006, 11:45 PM   #23
AVOjapan
Vendor
 
Member#: 71938
Join Date: Oct 2004
Location: Tokyo
Vehicle:
2004 BL Legacy GT
Regal Blue

Default

Testing update 2006:06:13
Moving backwards through time.... (I better edit the first post...)

More onroad testing notes. We'll need to provide a new datalog some time today, I think. Basically, we are now reaching 1bar of boost at 3000rpm. An HKS boost controller was being used, and it turns out that it's a newer model with older model instructions. We called about some inconsistancies, and they immediately told us they'd send a fax with the *correct* instructions, which were nearly 100% different from the older instruction book. Whee.

But the good news is as above.

Cheers,

Paul Hansen
www.avoturboworld.com | www.sevenphotos.com
AVOjapan is offline   Reply With Quote
Old 06-13-2006, 12:56 AM   #24
teh sash
Scooby Specialist
 
Member#: 79329
Join Date: Jan 2005
Chapter/Region: SCIC
Location: omgdontknow
Default

I may of missed this but is this on race gas or pump? if pump what octane?
teh sash is offline   Reply With Quote
Old 06-13-2006, 01:02 AM   #25
AVOjapan
Vendor
 
Member#: 71938
Join Date: Oct 2004
Location: Tokyo
Vehicle:
2004 BL Legacy GT
Regal Blue

Default

Japanese pump gas, high-octane. About 94 equivelant.

Cheers,

Paul Hansen
www.avoturboworld.com | www.sevenphotos.com
AVOjapan 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: (MA) AVO VF37 VF36 Bellmouth for AVO or Custom Twinscroll Downpipe atc5 Engine/Power/Exhaust 43 05-12-2010 03:26 PM
fs:c/f roof spoiler, amr big maf CAI, pnp'd avo 450 dual bb turbo.ALWAYS UPDATED Blackout713 Engine/Power/Exhaust 49 03-22-2010 10:32 AM
fs:socal -c/f roof spoiler, amr big maf CAI, pnp avo 450 dual bb turbo.ALWAYS UPDATED Blackout713 SCIC Private Classifieds 42 03-22-2010 10:28 AM


All times are GMT -4. The time now is 09:50 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.