18T question - 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 07-26-2007, 04:58 PM   #1
Live, eat, and sleep by TSL
 
Makeyousaab's Avatar
 
Join Date: Dec 2005
Location: Gainesville, FL
Posts: 1,348
Send a message via AIM to Makeyousaab
18T question

So my friend just offered me his mitsubishi 18T which is brand new never used, for free ( i helped him with his car and hooked him up with some paint) and he wrecked the car it was going in.

Now im curious what my options are, I had wanted to go to a larger turbo GT28/GT30 but this landing in my lap like this is kinda nice.

I have the TDO4 15T with 6cm exhaust side. Could I open my 6cm port into say a 7 or 8 cm instead? Take advantage of the larger compressor wheel. Looking at the compressor maps for the 18T its not much more impressive than the 15t (due to the 6cm im sure).

Or should I just sell this 18T and save up for a better spooling GT series. So basically is it economical to play around with this 18T sicne I'm getting it for free.

Thanks!
__________________
~Dave

1999 9-3 Vert. STG = pretty fast
Makeyousaab 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 07-26-2007, 05:07 PM   #2
Live, eat, and sleep by TSL
 
saab4life93t's Avatar
 
Join Date: Jul 2006
Location: Quechee, Vermont
Posts: 1,413
Send a message via AIM to saab4life93t
get it and sell it to me i'd buy it i too am looking to go with a gt 30 or gt35 havnt decided yet tho it would be a little better than the 15t i have until i get the gt...
__________________
1999 9 sold
1995 9k aero sold
1994 9k aero current
2002 viggen current

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
saab4life93t 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 07-27-2007, 05:36 AM   #3
 
mike saunders's Avatar
 
Join Date: Mar 2004
Location: Boston, MA
Posts: 6,468
Free is free....

You have a turbo with very close to the output of a $1,000 GT28, so you're way ahead of the game. You can use the money you saved and concentrate on breathing mods -- especially a big IC.

The main issue with the 18T is the high EGTs because the exhaust side can't flow enough to match the compressor. Lowering the intake temps will lower combustion temps which should keep EGTs within range....
mike saunders 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 07-27-2007, 09:23 AM   #4
Live, eat, and sleep by TSL
 
Makeyousaab's Avatar
 
Join Date: Dec 2005
Location: Gainesville, FL
Posts: 1,348
Send a message via AIM to Makeyousaab
Mike....are you saying methanol

But would it be possible to machine out the 6cm exhaust side? I still need to find out the exact specs on this 18T, im picking it up tomorrow. Soon I'll know if it would be worthwile to play around with it or just sell it.

Oh and whats a good recommended injector...green giants?
__________________
~Dave

1999 9-3 Vert. STG = pretty fast
Makeyousaab 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 07-27-2007, 09:27 AM   #5
Live, eat, and sleep by TSL
 
troll_speed's Avatar
 
Join Date: Jul 2006
Location: Montreal - Fly internationally
Posts: 1,074
Quote:
Originally Posted by Makeyousaab View Post
Oh and whats a good recommended injector...green giants?
This is a question for your tuner.

Jak likes 50pounders and the Green's are only 40 iirc.
__________________
Chris



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
troll_speed 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 07-27-2007, 09:34 AM   #6
Live, eat, and sleep by TSL
 
Makeyousaab's Avatar
 
Join Date: Dec 2005
Location: Gainesville, FL
Posts: 1,348
Send a message via AIM to Makeyousaab
Mike,
I do have the MP intercooler and im pretty sure an 18T would be well within the range of the MP's ability to flow/cool.
__________________
~Dave

1999 9-3 Vert. STG = pretty fast
Makeyousaab 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 07-27-2007, 10:36 AM   #7
Elder
 
stromer's Avatar
 
Join Date: Apr 2005
Location: Falmouth, Maine
Posts: 5,988
Send a message via AIM to stromer
You should be okay with the 18t if you make sure to bore out the housing enough.

Green Giants will work, I think they are 42lb. But there are also the decas that flow more for about the same price.
__________________
1999 9-3, 2002 9-5, 1979 900
z06 and a bunch of Chevy trucks
stromer 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 07-27-2007, 10:39 AM   #8
Elder
 
mcrowley's Avatar
 
Join Date: Oct 2005
Location: Albany, NY
Posts: 12,348
Send a message via AIM to mcrowley
Quote:
Originally Posted by stromer View Post
Green Giants will work, I think they are 42lb. But there are also the decas that flow more for about the same price.
Agreed, although I think the greens are 46#. Paul told me back in April that if I ever decided to go with an 18t to just go right to the Dekas as well.
__________________
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 07-27-2007, 03:09 PM   #9
lms
Live, eat, and sleep by TSL
 
Join Date: Jan 2006
Posts: 1,337
You can not go from a 6cm to 7 by boring.
Get seimens 60 lb injectors.
I went to the 18t-6 with a bored wastegate and I now wish I would have gone bigger. But with the injectors and the custom tune I have now, the car is very strong and never pulls boost. But that was before I moved to chi-town, and that was with 91 octane. Now that the car gets 93, it friggen runs even better, but it gets damn hot here.
lms 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 11:28 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.