Welcome to the North American Subaru Impreza Owners Club Monday December 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 > Normally Aspirated with bolt-on Forced Induction Powertrain

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 07-31-2004, 10:58 AM   #1
Mariano
NASIOC Supporter
 
Member#: 56
Join Date: Jun 1999
Chapter/Region: PRSIC
Location: Guaynabo, Puerto Rico
Vehicle:
1999 RS-T (Stage V)
2005 LGT LTD

Default From a GT28 to a TO3/TO4 Ball Bearing

I recently purchased a TO3/T04 Ball Bearing Turbo. My current GT28 spools quickly but dies at high RPMS. Has anyone hade any experience with the TO3/TO4 BB in their RS-T??? Did I make a good move from one to the other???

saludos,


Mariano
* Registered users of the site do not see these ads.
Mariano is offline   Reply With Quote
Old 07-31-2004, 11:06 AM   #2
markus
Scooby Specialist
 
Member#: 438
Join Date: Oct 1999
Chapter/Region: W. Canada
Location: St. Albert, AB, Canada
Vehicle:
2004 STi
White on Gold

Default

I know of an RS-T in my area with a BB t3-t4 hybrid and it runs VERY strong. Not sure about the turbo specifics though. It most certainly does not die at the top end though.
markus is offline   Reply With Quote
Old 07-31-2004, 11:45 PM   #3
ColinL
Scooby Guru
 
Member#: 114
Join Date: Jul 1999
Chapter/Region: MWSOC
Location: Wichita, KS and Whoring, OT
Vehicle:
'03 Evo, Rice White
'01 Erion CBR 929

Default

how much boost are you trying to run?
ColinL is offline   Reply With Quote
Old 08-01-2004, 09:16 PM   #4
Mariano
NASIOC Supporter
 
Member#: 56
Join Date: Jun 1999
Chapter/Region: PRSIC
Location: Guaynabo, Puerto Rico
Vehicle:
1999 RS-T (Stage V)
2005 LGT LTD

Impreza GC8

I'll be running same amount of boost as I do now: 10-12psis. The thing is that the other day I was driving on a highway and I realized that my GT28 it's great for "light to light", short runs, etc... and not for top end driving. I got spanked by a 2001-04 BMW M3...

saludos,

Mariano
Mariano is offline   Reply With Quote
Old 08-04-2004, 11:13 PM   #5
ColinL
Scooby Guru
 
Member#: 114
Join Date: Jul 1999
Chapter/Region: MWSOC
Location: Wichita, KS and Whoring, OT
Vehicle:
'03 Evo, Rice White
'01 Erion CBR 929

Default

sorry about the slow reply, but you're going the wrong way my friend. you maybe have already figured this out on your own if you've installed the turbocharger.

a GT28 of any trim will spool to only 12psi on a 2.5 SOHC pretty damn fast and easily hold it to redline. all you gain with a t3 is the ability to run more boost, which you can't do without lower compression (and hopefully better rods also).

your GT28 dying at high rpm is probably the cams or your tuning. get bigger cams and a standalone ECU and you'll be a happy man.
ColinL is offline   Reply With Quote
Old 08-05-2004, 08:52 AM   #6
Mariano
NASIOC Supporter
 
Member#: 56
Join Date: Jun 1999
Chapter/Region: PRSIC
Location: Guaynabo, Puerto Rico
Vehicle:
1999 RS-T (Stage V)
2005 LGT LTD

Impreza GC8

Colin,

I haven't installed the T3/T4 yet. I figured that since most of the turbo kits sold for the RS were based on using the T3/T4 hybrid that it would be even better to have one ball bearing (I might be completely wrong but that's why I'm looking for comments/answers in this forum). I've been in a RS-T with a "regular" T3/T4 and it was great at top end. Another experiment that I've not done is install my AVC-R. My guess is that with the AVC-R the 12psis will hold completely till redline, if so I'll sell the T3/T4.

I got the T3/T4 brand new at $422 (ebay) and even If I don't install it I know I can make a couple of bucks locally selling it.

thanks for your input

saludos,


Mariano
Mariano is offline   Reply With Quote
Old 08-06-2004, 02:09 AM   #7
ColinL
Scooby Guru
 
Member#: 114
Join Date: Jul 1999
Chapter/Region: MWSOC
Location: Wichita, KS and Whoring, OT
Vehicle:
'03 Evo, Rice White
'01 Erion CBR 929

Default

the 'dying at high rpm' also could just be a consequence of your strange torque curve as you make a lot of boost right away, and stay there. a dyno plot would help a lot obviously.

also, check for boost leaks if you're not holding 12 psi to redline especially in higher gears. tighten all your hose clamps with a socket they have the typical hex head with phillips in the center-- you want more force than can be applied with the screwdriver.
ColinL 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
Journal bearing non-wc to ball-bearing wc jpwrxtr06 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 2 10-30-2008 07:05 PM
Anyone know where to get a good ball bearing turbo? AntiochCali Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 5 09-08-2003 01:56 PM
What would be the benefit of ball bearing turbo compared to other ?? setiawani Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 4 09-28-2002 01:02 AM
TO3/TO4 Ballbearing "ballistic" Mariano Normally Aspirated with bolt-on Forced Induction Powertrain 0 01-15-2002 12:51 PM
Where to find ball bearing for mbc wagonbeast Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 5 10-23-2001 06:11 PM


All times are GMT -4. The time now is 10:16 AM.


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.