t25/28 vs gt2871 - The Saab Link Forums

Go Back   The Saab Link Forums > Saab NG900 '94-'98 and 9-3 '99-'02 Forum > Performance Modifications for the NG900 / Old 9-3

Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

SaabLink.net is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 01-31-2008, 11:41 AM   #1
Flirting With TSL Addiction
 
Join Date: Feb 2007
Location: cincinnati ohio
Posts: 453
t25/28 vs gt2871

hey guys im just sitting here wondering and thinking of doing a turbo slight upgrade from my t25/28 to a gt2871r. im sure i would have to get ecu re mapped but how bad would it be on the ecu i have now, would it really throw it off that much? i most likely wont do it im just sitting here dreaming and what not. i was lookin at my dyno sheets and thats what sparked this. id really like to see 300whp, im at 279whp now. and my top end starts to really fall off around 5200rpm.
sleet is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-31-2008, 02:28 PM   #2
Flirting With TSL Addiction
 
Join Date: Sep 2006
Posts: 896
well the gt will give you alot move top end than the t25.
it will run cooler which will in turn give you more power. bigger turbo means it will not have ti spin as much to make as much boost.
jonny72888 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 01-31-2008, 02:43 PM   #3
Flirting With TSL Addiction
 
Join Date: Feb 2007
Location: cincinnati ohio
Posts: 453
Quote:
Originally Posted by jonny72888 View Post
well the gt will give you alot move top end than the t25.
it will run cooler which will in turn give you more power. bigger turbo means it will not have ti spin as much to make as much boost.
yeha i know all that, just wondering would it throw off the maps in the ecu that much to have to get a new one or would this ecu maybe be ok for it. i know it would probably be best to get a remapped ecu but im just curious
sleet is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
 
Old 01-31-2008, 02:46 PM   #4
Flirting With TSL Addiction
 
Join Date: Sep 2006
Posts: 896
Quote:
Originally Posted by sleet View Post
yeha i know all that, just wondering would it throw off the maps in the ecu that much to have to get a new one or would this ecu maybe be ok for it. i know it would probably be best to get a remapped ecu but im just curious
i went from the t25 to the td04 on stage3 sw and it was all good but once i got my stage4 sw it was even better. im sure it would be fine, i would talk to your tunner and see what they think. just know they will push you to get a new tune.
jonny72888 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 01-31-2008, 03:12 PM   #5
JK
Elder
 
JK's Avatar
 
Join Date: Sep 2005
Location: Land of 10,000 L-holes
Posts: 13,686
GT2871r, yes, it will perform much differently than the t25/28 hybrid.

Much different.
__________________
always a SAAB guy at heart
JK is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 01-31-2008, 05:47 PM   #6
Elder
 
Castor Troy's Avatar
 
Join Date: Nov 2003
Location: Montana
Posts: 3,998
the only thing they really have in common is they're both turbos.....they're for completely different power ranges and uses
__________________
^The preceeding post probably had something to do with Seth Romer.
Castor Troy is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-01-2008, 06:57 AM   #7
JZW
Elder
 
Join Date: Oct 2006
Location: Boulder Colorado
Posts: 3,153
Quote:
Originally Posted by sleet View Post
hey guys im just sitting here wondering and thinking of doing a turbo slight upgrade from my t25/28 to a gt2871r. im sure i would have to get ecu re mapped but how bad would it be on the ecu i have now, would it really throw it off that much? i most likely wont do it im just sitting here dreaming and what not. i was lookin at my dyno sheets and thats what sparked this. id really like to see 300whp, im at 279whp now. and my top end starts to really fall off around 5200rpm.
I went from the t28 to my gt3071 and it was not too bad, it was a little lean on the top end, maybe 13.1/1 and that was about what I was running with the Big T28. I had a stage 5 with 50# injectors on the car before I swapped turbos.

To me, the gt3071 .64ar spools just as fast or maybe faster than the gt2871 and it has a little more grunt to it. They are about the same price and I would just buy the gt3071 .64ar if I were you... Good Luck,

John
__________________
b234r ng900, E-85 Holset Super [email protected] mph a mile high 645whp/650wtrq Sae Denver
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
JZW is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-01-2008, 10:57 PM   #8
Flirting With TSL Addiction
 
Join Date: Feb 2007
Location: cincinnati ohio
Posts: 453
hey guys a guy on a local site here is selling a gt28rs for very good price due to him in financial problems. basically i could get this and sell my t25/28 for same price and only have to deal with labor (myself) unless i take it somewhere and the fittings and such. although im just considering my options here and dreaming. how much different would this be and would it be worth it to you guys? i know the rs is rated to about 350-360 hp and right now im making 279whp = 320 hp with the t25/28. would the rs get me to 300whp and would my ecu tune i have in now work with it or would it lean out to much you think?
sleet is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-02-2008, 09:23 AM   #9
Flirting With TSL Addiction
 
Join Date: Sep 2006
Posts: 896
Quote:
Originally Posted by sleet View Post
hey guys a guy on a local site here is selling a gt28rs for very good price due to him in financial problems. basically i could get this and sell my t25/28 for same price and only have to deal with labor (myself) unless i take it somewhere and the fittings and such. although im just considering my options here and dreaming. how much different would this be and would it be worth it to you guys? i know the rs is rated to about 350-360 hp and right now im making 279whp = 320 hp with the t25/28. would the rs get me to 300whp and would my ecu tune i have in now work with it or would it lean out to much you think?
talk to your tunner, jak told me that going from a t25 to a td04 would be fine aslong as i do not beat the hell out of the car alot. im sure it would be fine for awhile, you could put it all on and then dyno it and send the sheet to your tunner and see what he thinks. but if the turbo is cheap, i would do it.


and just wondering, how much would you sell your old one for?
jonny72888 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-02-2008, 09:31 AM   #10
Flirting With TSL Addiction
 
Join Date: Feb 2007
Location: cincinnati ohio
Posts: 453
Quote:
Originally Posted by jonny72888 View Post
talk to your tunner, jak told me that going from a t25 to a td04 would be fine aslong as i do not beat the hell out of the car alot. im sure it would be fine for awhile, you could put it all on and then dyno it and send the sheet to your tunner and see what he thinks. but if the turbo is cheap, i would do it.


and just wondering, how much would you sell your old one for?
well the gt28rs is for sale for 500 and if i were to do it i would maybe sell mine for the same, maybe. the turbo is less than a year old with maybe 10k miles or around there? 99 percent sure i wont do this as i dont have the funds right now since im saving every penny i can to get a loan paid off. but im just considering my options. i figured the rs wouldnt be to big of a difference but im thinking it could possibly get me closer if not meet that 300whp mark and have a little better top end
sleet is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-02-2008, 12:42 PM   #11
JZW
Elder
 
Join Date: Oct 2006
Location: Boulder Colorado
Posts: 3,153
It would take about all the gt28rs has to get 300whp. You would be pretty close to the edge, where as a gt2871 or gt3071 would give you 300whp at 20psi and not push things hard at all and then you can run 23-25psi and make 330-350whp on a dynojet.

The tdo4-18t is rated at 350-360bhp, about the same as the gt28rs or the JSP Big T28/gt28r turbo I had. It was around 294whp with the cf in half in Denver or 318whp sae on a dynojet. I had to push the car pretty hard to get that close to 300whp out of it, 25-29psi of boost and the 50# injectors and my large ets ic.

The gt28rs would give you better low end grunt and around town drivability, but would still run out of emph in the rpms above around 5k-5500rpm. If you want good drivability and decent power, this a great turbo. If you want 300whp, you should consider a larger turbo that won't have to work so hard to give you those bigger whp numbers you want.

If you want to make 300whp without pushing things too much, you need at least a gt2871 or gt3071 .64ar in my opinion...

John
__________________
b234r ng900, E-85 Holset Super [email protected] mph a mile high 645whp/650wtrq Sae Denver
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
JZW is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-02-2008, 11:12 PM   #12
Elder
 
comtrang's Avatar
 
Join Date: Aug 2007
Location: Salt Lake City, UT/Kansas City, MO
Posts: 2,347
Send a message via MSN to comtrang
Those Holsets sure are nice, too..


But definitely NOT bolt on.
comtrang is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-27-2008, 12:47 PM   #13
Flirting With TSL Addiction
 
Join Date: Jan 2008
Location: Portland,Oregon
Posts: 664
Send a message via AIM to ViggenStory
Hey John how much does the big T28 turbo gives you to the whp and tq? since u know from experience man. i wanan get it for my car. by summer. im saving up for it.
ViggenStory is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-27-2008, 12:53 PM   #14
Elder
 
Legit's Avatar
 
Join Date: Jun 2007
Location: St. Paul, MN
Posts: 2,983
Quote:
Originally Posted by ViggenStory View Post
Hey John how much does the big T28 turbo gives you to the whp and tq? since u know from experience man. i wanan get it for my car. by summer. im saving up for it.
It is an upgrade from the TD04-18t. Jaks stage 5 with the Aero turbo is ~281/302 at wheels so Id guess between 290-300whp and 310-320ft lbs
__________________
2002 Viggen Convertible
Legit is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-27-2008, 01:04 PM   #15
Elder
 
mcrowley's Avatar
 
Join Date: Oct 2005
Location: Albany, NY
Posts: 12,348
Send a message via AIM to mcrowley
18t isn't just a regular old Aero turbo.

The 281/302 is pretty close to what my 900 made with the 15t-6cm on it, so I'd bet with an 18t/t28/gt28rs you could certainly do better.
__________________
95 9000 Aero
96 900 SE
06 9-5

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mcrowley is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-27-2008, 01:10 PM   #16
Elder
 
Legit's Avatar
 
Join Date: Jun 2007
Location: St. Paul, MN
Posts: 2,983
Quote:
Originally Posted by mcrowley View Post
18t isn't just a regular old Aero turbo.

I know that was just for a size comparison
__________________
2002 Viggen Convertible
Legit is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-27-2008, 02:03 PM   #17
Flirting With TSL Addiction
 
Join Date: Jan 2008
Location: Portland,Oregon
Posts: 664
Send a message via AIM to ViggenStory
290 wheel man. i wanan get the BIG T28 FROM JSP. is the BIG T28 a ball bearning turbo?
ViggenStory is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-27-2008, 02:21 PM   #18
Live, eat, and sleep by TSL
 
moose's Avatar
 
Join Date: Jun 2006
Location: Manchester, NH
Posts: 1,751
Send a message via AIM to moose
Quote:
Originally Posted by ViggenStory View Post
290 wheel man. i wanan get the BIG T28 FROM JSP. is the BIG T28 a ball bearning turbo?
no its just the T25 machined out and with new internals to make it a BIG T28.
__________________
undercover Moderator

Stg. no go
My transmission boggles minds!!!
moose is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-27-2008, 02:23 PM   #19
Flirting With TSL Addiction
 
Join Date: Jan 2008
Location: Portland,Oregon
Posts: 664
Send a message via AIM to ViggenStory
nice thats still good.
ViggenStory is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the The Saab Link Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Vehicle Info.
Enter your vehicle information (year, model, mods)
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 05:58 AM.


Powered by vBulletin® Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.5.2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
All content is copyright The Saab Link and it's original authors.


 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.