Welcome to the North American Subaru Impreza Owners Club Tuesday October 22, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC General > Proven Power Bragging

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. 
Closed Thread
 
Thread Tools Display Modes
Old 07-03-2010, 07:15 PM   #1
garageGT
Former Vendor
 
Member#: 80524
Join Date: Jan 2005
Location: San Diego
Default EJ205 testing: Twin Scroll vs Eq.lenght SS vs UnEq.lenght SS

In the search of useable street powerbands, we had a chance to test the following setups on our head mechanic's 2005 USDM WRX.

Variables:
Tomei Equal lenght twin scroll headers/uppipe & Tomei 7760 TS turbo
Tomei Equal lenght single scroll headers/uppipe & Tomei 7760 SS turbo
Tomei UnEqual lenght single scroll headers/uppipe & Tomei 7760 SS turbo

Event: dyno powerband testing
Location: garageGT San Diego
Ambient Temp: 70F
Elevation: 100 ft above sea level
Weather: sunny

Car: 2005 USDM WRX
Tuner: Everett Lucas
Dyno Info: DynoDynamics
Transmission: 5spd w/OE clutch
Mods:
Stock EJ205 motor w/60,000 miles
76mm/3" garageGT bellmouth downpipe
HKS carbonTi 76mm/3" catback exhaust
garageGT Spec Grill mount intercooler kit
RC650cc injectors
HKS DLI II
NGK iridium spark plugs
Stock ECUflash tune
Target boost: 20psi on 91 octane (Manual boost controller)
Target AFR: 11.5:1

We installed the Tomei Equal Lenght TS headers/uppipe & M7760 TS turbo and started tuning.. The initial results showed that the twin scroll setup wanted to build 8psi of boost as early as 4000RPMs, but the lack of AVCS resulted in a lazy boost curve, hitting target boost of 20psi at 5600RPMs. Since this is not the hi-rev EJ207 motor, the power curve on top end did not benefit from this setup. The motor & cylinder head design did not flow enough after 6000RPMs with a combined uppipe diameter of 78mm (2x39mm) compared to 55mm for the single scroll version. Also note that the turbo exhaust housing ports are narrowing down to about 33mm. The best graph we got for the TS setup was run #25 which was done when the intercooler and engine was fairly cold. So we installed the Tomei Equal lenght single scroll headers/uppipe & M7760 SS and contiuned tuning. The next graph shows the comparison between these two setups (tuned vs tuned). Please note the single scroll run was a hot run. The TS setup is making more low end power but it cannot keep up with single scroll on the top end.





Then we switched to UnEqual lenght headers and ran the car on the dyno without adjusting fuel/ignition or boost. For referance, we still have the TS run on the graph.





The UnEqual lenght heades shifted the powerband to the left, the low end power is about same as TS setup. 8 psi of boost is built at 4000RPMs, but the target boost (20psi) is reached at 4900RPMs instead of TS hitting the same boost at 5600RPMs. Thus the UnEqual SS setup makes more power at midrange. Please note that run #35 and #41 are hot runs. When the motor/intercooler was cooled down, the flow characteristics become more obvious.





The Equal lenght header setup pushes the powerband to the top end as expected. The UnEqual lenght headers are awesome at low end. We decided to keep the UnEqual lenght SS setup on the car. Until we get the JDM EJ207 AVCS motor, we are not going back to Twin Scroll. We think the hi revving engine design along with bigger head ports and AVCS are factors for the TS system to work properly. We will be testing M7760 SS vs TS on GRB USDM STi soon. We will also be testing the new upcoming bigger ID TS header. Stay tuned.

Final setup & powerband for EJ205: UnEqual lenght headers/uppipe & M7760 SS turbo @ 20psi



complete write up with compressor maps etc
* Registered users of the site do not see these ads.
garageGT is offline  
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-04-2010, 01:10 PM   #2
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Default

Something else is wrong. 7760 + tomei headers should be spooling sometime before next week.


http://forums.nasioc.com/forums/show...php?p=30960250
Dynojets typically spool late-ish compared to the street and normally an EJ205 sees full boost WAY earlier than 5k.

I don't know how many conclusions I'd draw about spool and pre-spool torque curves when there's obviously something else going on.

Last edited by Concillian; 07-04-2010 at 02:31 PM.
Concillian is offline  
Old 07-04-2010, 10:57 PM   #3
GundamFan
Scooby Newbie
 
Member#: 212204
Join Date: May 2009
Location: socal
Vehicle:
2002 WRX

Default

Im interested to see the same setup w the oem headers. I think it would spool faster, im a big fan of oem headers for sub 325awhp setups...
GundamFan is offline  
Old 07-04-2010, 11:24 PM   #4
Airelpaso
Scooby Newbie
 
Member#: 139566
Join Date: Feb 2007
Location: Palatine, IL
Vehicle:
2004 Forester XT
Gold

Default

I want to see the Tomei 7760 TS on the Ej207, be sure to post the results when you test that combo.
Airelpaso is offline  
Old 07-04-2010, 11:28 PM   #5
fastwrx25
Scooby Guru
 
Member#: 126441
Join Date: Sep 2006
Chapter/Region: SCIC
Location: TPE
Vehicle:
03 bugeye

Default

^^stock header comparison would be great

Last edited by fastwrx25; 07-05-2010 at 01:14 AM.
fastwrx25 is offline  
Old 07-05-2010, 12:38 AM   #6
RexFTW
Scooby Specialist
 
Member#: 107179
Join Date: Feb 2006
Chapter/Region: MWSOC
Location: Bensenville, IL
Vehicle:
S4, WRX
1.27 60', 9.37 1/4

Default

There is something wrong here... that thing is spooling like a 3076 on a stock 205 and the 7760 doesn't flow as much as a 3076.

The Tomei is said to basically be a 20G and my 20G was hitting 20 psi in the 3,400-3,500 rpm range on my stock ej205. Even if it is a little bit bigger that wouldn't explain almost 1,500+ RPM of spool difference.

Dyno runs in 1st/2nd gear maybe?
RexFTW is offline  
Old 07-05-2010, 12:51 AM   #7
fellstar
Scooby Specialist
 
Member#: 205280
Join Date: Mar 2009
Chapter/Region: MWSOC
Location: Merrillville, IN
Vehicle:
2012 Jeep Wrangler
Bright Silver

Default

Quote:
Originally Posted by Airelpaso View Post
I want to see the Tomei 7760 TS on the Ej207, be sure to post the results when you test that combo.

This, 1000x this.

I'm interested to see the benefits of the EJ207 high rev and big port headover the EJ205. (I'm currently doing this swap!) Especially in the TS/SS UEL/UL debate!
fellstar is offline  
Old 07-05-2010, 01:19 AM   #8
LittleBlueGT
Scooby Specialist
 
Member#: 96204
Join Date: Sep 2005
Chapter/Region: W. Canada
Location: Winnipeg
Vehicle:
2013 STI GR
White

Default

This whole posts, while it sounds good, just has all sorts of wrong all over it.

How can you possibly get any 20g to spool that late? Is the temp around 150F and you are at an elevation of about 18,000 feet?

At any rate, I will start:

Quote:
Originally Posted by garageGT View Post
The motor & cylinder head design did not flow enough after 6000RPMs with a combined uppipe diameter of 78mm (2x39mm) compared to 55mm for the single scroll version.
You never add the diameter of two pipes together to compare them with the diameter of a single pipe.

39mm ID (assuming ID) would have a X-sectional area of 1194mm square. Two pipes would be 2388mm square.

55mm ID would have a X-sectional area of 2374mm square.

So the two pipes of the TS set-up have about 0.6 % difference, or NO REAL DIFFERENCE AT ALL, vs the SS set-up.

you make it sound like the difference is 42%.
LittleBlueGT is offline  
Old 07-05-2010, 01:23 AM   #9
seanathanq83
Scooby Guru
 
Member#: 173241
Join Date: Feb 2008
Chapter/Region: TXIC
Location: Houston, Tx
Vehicle:
2002 s256 twinscroll
now with one more gear

Default

i like the concept of all the different setups, but i feel something is wrong, not sure if its because of the stated sizes of the twinscroll up pipe runners, or what, but on a stock vf37 twinscroll setup, ( i know its not a 20g ) i make about the same power on air boys, at the same boost, and spool quicker, even when i had a 20g wheel it, it spooled quicker and make 20whp more, but i do agree that on a 207 with avcs it would be way better, i would like to see the same test done on e85 with a little more boost see what that 7760 is really able to do
seanathanq83 is offline  
Old 07-05-2010, 01:18 PM   #10
rexblake
Scooby Specialist
 
Member#: 178426
Join Date: Apr 2008
Location: FoCo
Vehicle:
2010 S4
Gray

Default

I appreciate you guys going through all the work of doing this. It also back's up Tomei's claims between the unequal and equal length single scroll headers. I'm curious what Perrin is doing differently to spool quicker with their single scroll equal length.
rexblake is offline  
Old 07-05-2010, 01:51 PM   #11
NSFW
Scooby Guru
 
Member#: 140444
Join Date: Feb 2007
Chapter/Region: NWIC
Location: Near Seattle, WA
Vehicle:
05 Stage Free LGT
ATP 3076, 6MT, AVO FMIC

Default

It would be useful to see three pulls from a single setup, so we can see how much run-to-run variation there is. Otherwise it's impossible to know if the increase or decrease shown in the comparison is actually meaningful.
NSFW is offline  
Old 07-05-2010, 02:37 PM   #12
crashtke
Scooby Specialist
 
Member#: 120912
Join Date: Jul 2006
Chapter/Region: South East
Location: Atlanta, GA
Default

Is there an AR difference between the single scroll housing and the twin scroll?
crashtke is offline  
Old 07-05-2010, 04:08 PM   #13
Equilibrium Tuning
Former Vendor
 
Member#: 26933
Join Date: Oct 2002
Chapter/Region: BAIC
Location: Fairfield, CA
Vehicle:
2006 STI
CGM

Default

At least everyone else is seeing the issues with these tests this time. You guys are putting in a good effort, but by avoiding your due diligence with each setup, you're making your results useless once again. Check for leaks EACH time on both the boost and exhaust side. And maybe get a new tuner

-- Ed
Equilibrium Tuning is offline  
Old 07-06-2010, 03:21 AM   #14
Fierysun
Scooby Guru
 
Member#: 82745
Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2005 Subaru STI
2003 EJ207 S204 Wagon

Default

Kudos for all that hard work, but something is not right with those tunes/setup.
Fierysun is offline  
Old 07-06-2010, 12:59 PM   #15
garageGT
Former Vendor
 
Member#: 80524
Join Date: Jan 2005
Location: San Diego
Default

Quote:
Originally Posted by Concillian View Post
Something else is wrong. 7760 + tomei headers should be spooling sometime before next week.


http://forums.nasioc.com/forums/show...php?p=30960250
Dynojets typically spool late-ish compared to the street and normally an EJ205 sees full boost WAY earlier than 5k.

I don't know how many conclusions I'd draw about spool and pre-spool torque curves when there's obviously something else going on.
Our ramp rate is 80 on a load type dyno dynamics. I can run at shootout mode, which would almost look like a dynojet run. We are also on a FMIC setup, not TMIC.

Quote:
Originally Posted by GundamFan View Post
Im interested to see the same setup w the oem headers. I think it would spool faster, im a big fan of oem headers for sub 325awhp setups...
Yes, the spool would be faster, but we would lose top end..OE header (2.0L WRX and 2.5L STi both 39mm ID runners) makes more power upto 5500RPM range. Tomei did a test back in the day, its the 2nd graph from the top; http://www.tomei-p.co.jp/news/Report-EJ25-V1.php

I dont think we will test the OE headers on this motor, but we have EJ257 test coming up where will start with 7760 single scroll / OE headers / TMIC.

Quote:
Originally Posted by Airelpaso View Post
I want to see the Tomei 7760 TS on the Ej207, be sure to post the results when you test that combo.
I really want to see this as well, but we dont have a shop car with this setup currently. Maybe if we can find a car in socal ?

Quote:
Originally Posted by RexFTW View Post
There is something wrong here... that thing is spooling like a 3076 on a stock 205 and the 7760 doesn't flow as much as a 3076.

The Tomei is said to basically be a 20G and my 20G was hitting 20 psi in the 3,400-3,500 rpm range on my stock ej205. Even if it is a little bit bigger that wouldn't explain almost 1,500+ RPM of spool difference.

Dyno runs in 1st/2nd gear maybe?
Dyno run was on 4th gear. That could be another reason the spool looks slow. If you compare it to a non-load type dyno run on 3rd gear, of course its going to look sluggish. The spool on the street feels like a WRX/VF43 setup with more top end. The car is faster than a 300WHP turbobackd 04 STi. I had a 20g on my 02 WRX 3 years ago, and it spooled at about 5000ish with the eq.lenght invidia headers.

Quote:
Originally Posted by fellstar View Post
This, 1000x this.

I'm interested to see the benefits of the EJ207 high rev and big port headover the EJ205. (I'm currently doing this swap!) Especially in the TS/SS UEL/UL debate!
EJ207 motor is a beast. AVCS makes a huge difference at low end and those heads flow really well on top end. Good choice. I'm sure i will it tested if i can get my hands on one

Quote:
Originally Posted by LittleBlueGT View Post
This whole posts, while it sounds good, just has all sorts of wrong all over it.

How can you possibly get any 20g to spool that late? Is the temp around 150F and you are at an elevation of about 18,000 feet?

At any rate, I will start:



You never add the diameter of two pipes together to compare them with the diameter of a single pipe.

39mm ID (assuming ID) would have a X-sectional area of 1194mm square. Two pipes would be 2388mm square.

55mm ID would have a X-sectional area of 2374mm square.

So the two pipes of the TS set-up have about 0.6 % difference, or NO REAL DIFFERENCE AT ALL, vs the SS set-up.

you make it sound like the difference is 42%.
good point. I did not intend to make it sound like that. Will correct it.

Quote:
Originally Posted by seanathanq83 View Post
i like the concept of all the different setups, but i feel something is wrong, not sure if its because of the stated sizes of the twinscroll up pipe runners, or what, but on a stock vf37 twinscroll setup, ( i know its not a 20g ) i make about the same power on air boys, at the same boost, and spool quicker, even when i had a 20g wheel it, it spooled quicker and make 20whp more, but i do agree that on a 207 with avcs it would be way better, i would like to see the same test done on e85 with a little more boost see what that 7760 is really able to do
Our dyno #s are very low figures. We should get a airboy calculation..

the exhaust wheels on OE single and OE twin scroll turbos are same size, but the blades look slightly different. I will ask this to tomei..
http://3.bp.blogspot.com/_CFVLrb_PbN...ei+7760+TS.JPG

Quote:
Originally Posted by rexblake View Post
I appreciate you guys going through all the work of doing this. It also back's up Tomei's claims between the unequal and equal length single scroll headers. I'm curious what Perrin is doing differently to spool quicker with their single scroll equal length.
We are really trying to test how TS behaives on different engines..Perrin only offers Equal lenght single scroll headers (same ID as tomei Equal lenght TS headers).

Quote:
Originally Posted by NSFW View Post
It would be useful to see three pulls from a single setup, so we can see how much run-to-run variation there is. Otherwise it's impossible to know if the increase or decrease shown in the comparison is actually meaningful.
just got that graph online.
http://1.bp.blogspot.com/_CFVLrb_PbN...s+in+a+row.jpg
#23 cold TS run
#24 hot TS run
#25 cold TS run

Quote:
Originally Posted by crashtke View Post
Is there an AR difference between the single scroll housing and the twin scroll?
yes, there is. I have ask tomei for the figures though.. will update...

Quote:
Originally Posted by Fierysun View Post
Kudos for all that hard work, but something is not right with those tunes/setup.
All we are tying to do is setup the best powerband for the 2.0L WRX. We paid quite a bit of money for the TS setup, and now we see it was not really worth it. Tomei never recommended it for the non-AVCS motors Now we want to discuss why. We know there is something wrong This is really not for any product promotion. This is our head mechanics car, daily driven and mountain ridden.
garageGT is offline  
Old 07-06-2010, 01:33 PM   #16
CGM/WRX
Scooby Newbie
 
Member#: 87133
Join Date: May 2005
Chapter/Region: SCIC
Location: SoCal
Vehicle:
1998 2.5RS
Brilliant Red

Default

Quote:
Originally Posted by Equilibrium Tuning View Post
At least everyone else is seeing the issues with these tests this time. You guys are putting in a good effort, but by avoiding your due diligence with each setup, you're making your results useless once again. Check for leaks EACH time on both the boost and exhaust side. And maybe get a new tuner

-- Ed
The setup on my car I Know was done right and had NO boost leaks or exhaust leaks pre-turbo or post-turbo. I bought the Tomei T/S setup hoping to have a good result even tho the did not recommend this setup for my car. I know that its also not the tuner where the problem lies because I wanted a moderate tune due to that its my daily and I still have the stock clutch. They actually recommended the S/S version instead of the T/S because they said that there T/S turbo was designed for the GRB sti's. The bottom end was ok but it felt as if my engine couldnt flow enough on the top end for the turbo.
I'm pretty sure that the stock headers would spool up faster and will probably do the testing for that soon. But even if they do spool better I would not run them due to that they make the car way to loud. I would go back to the Tomei T/S setup if at some point I swap in a motor with AVCS (257 or 207).
CGM/WRX is offline  
Old 07-06-2010, 01:45 PM   #17
Phatron
Scooby Guru
 
Member#: 36033
Join Date: Apr 2003
Chapter/Region: SCIC
Location: Tuning Lab
Vehicle:
CEO PhatBottiTuning
2006 STi GTX3582 + Meth

Default

Quote:
Originally Posted by garageGT View Post
Stock ECUflash tune
Target boost: 20psi on 91 octane (Manual boost controller)
Target AFR: 11.5:1
Quote:
Originally Posted by garageGT View Post
We dont tune for max performance and send the customers out with a ticking bomb under the hood. When we tune the WRX at 10.5 AFR, most "so called" tuners here laugh at us
does not compute.....

and what does "stock ecuflash tune" mean?

stock ecu with a tune using ecuflash?

or you used ecuflash and loaded a stock tune?
Phatron is offline  
Old 07-06-2010, 01:48 PM   #18
CGM/WRX
Scooby Newbie
 
Member#: 87133
Join Date: May 2005
Chapter/Region: SCIC
Location: SoCal
Vehicle:
1998 2.5RS
Brilliant Red

Default

Quote:
Originally Posted by Phatron View Post
does not compute.....

and what does "stock ecuflash tune" mean?

stock ecu with a tune using ecuflash?

or you used ecuflash and loaded a stock tune?
haha the tune was open source

10.5 is a tmic tune and the 11.5 is a fmic tune

Last edited by CGM/WRX; 07-06-2010 at 01:57 PM.
CGM/WRX is offline  
Old 07-06-2010, 01:54 PM   #19
Phatron
Scooby Guru
 
Member#: 36033
Join Date: Apr 2003
Chapter/Region: SCIC
Location: Tuning Lab
Vehicle:
CEO PhatBottiTuning
2006 STi GTX3582 + Meth

Default

this test either proves

1 - the tomei turbo sucks ballz

2 - there was a leak

3 - there is something inherently wrong with the way you guys are installing something....maybe leaving the pills in the bcs lines.....or something. the way the dyno is set to load?

every single one of your "tests" seems to show everything extremely laggy.
Phatron is offline  
Old 07-06-2010, 01:56 PM   #20
CGM/WRX
Scooby Newbie
 
Member#: 87133
Join Date: May 2005
Chapter/Region: SCIC
Location: SoCal
Vehicle:
1998 2.5RS
Brilliant Red

Default

One other thing is that while I know some tuners like to get the maximum potential out of the car, we tend to tune for longevity (endurance type racing). So if the numbers look low or off they probably are due to that are tune is done differnetly and our dyno is a low reading dyno. We weren't trying to compare to other cars just the three different setups because we know the numbers wont match other cars.
CGM/WRX is offline  
Old 07-06-2010, 02:11 PM   #21
Phatron
Scooby Guru
 
Member#: 36033
Join Date: Apr 2003
Chapter/Region: SCIC
Location: Tuning Lab
Vehicle:
CEO PhatBottiTuning
2006 STi GTX3582 + Meth

Default

we're not looking at peak numbers....and most of us know about how different dynos read.

the comments are to the spool. to get a mbc car to spool so late its almost a given that there is a leak.

i think my 60 lb/min turbo on my wrx spooled 1000rpm sooner than this 20g.
Phatron is offline  
Old 07-06-2010, 02:28 PM   #22
garageGT
Former Vendor
 
Member#: 80524
Join Date: Jan 2005
Location: San Diego
Default

Quote:
Originally Posted by Phatron View Post
this test either proves

1 - the tomei turbo sucks ballz

2 - there was a leak

3 - there is something inherently wrong with the way you guys are installing something....maybe leaving the pills in the bcs lines.....or something. the way the dyno is set to load?

every single one of your "tests" seems to show everything extremely laggy.
the reason we chose to test the turbo was the TS option. I would love to do the same test with OE TS unit. The turbo could be discussed throughly but thats not our subject. You should concentrate on looking at the results without prejudice (boost leak), nothing changed on the car except headers, uppipe and turbo. Look at the differences, dont think about it should spool at XXXX RPM. Just look at how these 3 setups behaive at similar conditions. At the end of the day, our head mechanic wants the best of best for his own car. We ran it hard on the mountain yesterday, it was a blast!
garageGT is offline  
Old 07-06-2010, 03:51 PM   #23
LittleBlueGT
Scooby Specialist
 
Member#: 96204
Join Date: Sep 2005
Chapter/Region: W. Canada
Location: Winnipeg
Vehicle:
2013 STI GR
White

Default

Quote:
Originally Posted by Phatron View Post
there is something inherently wrong with the way you guys are installing something....maybe leaving the pills in the bcs lines.....or something. the way the dyno is set to load?
Just think though, even with no pill installed, or anything wrong w/ boost control, the actuator would cause it to spool to whatever it was set at regardless.

The baseline road-logs that I do on cars I tune with 0% WGDC all spool much better then this, even in 100+ IAT.

I just don't get it.

I would love to see a "normal" dyno do a back to back on a 20Gish TS vs SS, like EFI logics, or even Yimi-sports dyno-jet.

Any dyno that shows normal spool, like the way our cars actually respond on the road.

Having a 20G spool at 5000 rpm is just ludicrous, and to me invalidates any comparison data between the two.
LittleBlueGT is offline  
Old 07-06-2010, 04:17 PM   #24
Badler
Scooby Guru
 
Member#: 133597
Join Date: Nov 2006
Chapter/Region: SCIC
Location: Orange
Default

Don't forget this turbo is supposed to spool faster than a 20g. It's also $2000
Badler is online now  
Old 07-06-2010, 04:51 PM   #25
Krang
Scooby Specialist
 
Member#: 134272
Join Date: Dec 2006
Chapter/Region: HIIC
Location: Kahaluu, Hawaii
Vehicle:
2007 Sti, UGM
Rotated EFR 6758

Default

Dynos are for comparison purposes, he compared. What's the problem? Obviously the dyno is not loading well, so what? The spool #'s themselves are irrelevant, the important information is that uel single > el single > ts on the 2.0l ej205 motor.

Good to know, thanks!
Krang is offline  
Closed Thread

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
GTX-R vs. HTA vs. Twin Scroll? Juks Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 22 02-04-2010 01:49 PM
Twin Scroll VF37,TS up, down, wrx heads, machined ej205, wiseco pistons northmiler89 NESIC Private Classifieds 3 11-13-2008 09:55 AM
Single Scroll vs. Twin scroll..Newb Here! JDM_Scobaru Newbies & FAQs 21 07-14-2006 04:19 AM
vf34 vs. vf35 vs. twin scroll crayons Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 22 01-29-2005 09:26 PM
vf34 vs. vf35 vs. twin scrolls crayons Normally Aspirated with bolt-on Forced Induction Powertrain 1 01-20-2005 06:23 PM

All times are GMT -4. The time now is 05:15 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.