Results 1 to 10 of 10

what size turbo

This is a discussion on what size turbo within the Forced Induction forums, part of the LSx Technical Help Section category; i'm building a single turbo setup for my 98 trans am a4... I'm just wondering what would be a good ...

  1. #1
    Junior Member
    Join Date
    Jun 2008
    Location
    lincoln ne
    Posts
    33

    red
    1998 trans am

    what size turbo

    i'm building a single turbo setup for my 98 trans am a4... I'm just wondering what would be a good size... i do have a 125 shot of nitrous, that i plan on keeping to help spool the turbo if i go to big... I'm also planing a 438ci lsx, i'd like to not have to buy a bigger turbo when i do the motor swap

  2. #2
    Member cailey37's Avatar
    Join Date
    Mar 2006
    Location
    Mississippi
    Posts
    832

    Silver
    1998 Pontiac Trans Am

    If you're going to be putting in a 438ci motor later then I'd go with an 88mm. I dont think a 76mm would fill it.

  3. #3
    Rodzilla Tha Cavity Filla zero_proto's Avatar
    Join Date
    Sep 2006
    Location
    San DEEEE Eggo
    Age
    30
    Posts
    2,985

    teal
    99 Z28 with an SS complex

    i agree with an 88mm........76 will probably run out real quick

  4. #4
    Junior Member
    Join Date
    Jun 2008
    Location
    lincoln ne
    Posts
    33

    red
    1998 trans am

    ball bearing or journal bearing?

  5. #5
    Junior Member
    Join Date
    Aug 2005
    Location
    Cali
    Age
    42
    Posts
    37

    Black
    00 SS camaro

    s88 from forced inductions the s series turbos are the best. They are a large frame t6 exhaust housing and make sick power. A 438 ci motor is gonna need a t6 framed turbo of at least 88mm.

  6. #6
    Junior Member CHRIZ28's Avatar
    Join Date
    Jul 2008
    Location
    Pocahontas, AR
    Posts
    26

    Navy Blue Metallic
    2000 Z28

    Yea, definatly gonna need alot of turbo for that much ci. I talked to Jose at forced inductions for what to use with my 408. We're going with a S91, the S88 would have been fine, but for a couple more hundred and the same packaging size, why not. 438ci should spool a S91 pretty quick and should make a TON of power! But on stock cubes a 76mm or the like would make awesome power too. Good luck either way.

    Chris
    Loving Memory:Tim Huddleston "HOTHAWK" Great Father and my Best Friend

  7. #7
    Junior Member
    Join Date
    Jun 2008
    Location
    lincoln ne
    Posts
    33

    red
    1998 trans am

    thanks

  8. #8
    TunedbyFrost.com Tuner Frost's Avatar
    Join Date
    Jul 2007
    Location
    Richmond VA
    Posts
    2,415

    LS1.com Sponsor
    GM Tuner

    An s88 will run out up top with that many cubes. It pretty much has to be an S90 at the smallest, and you could run bigger. These turbos have no business behind a stock displacement engine.

  9. #9
    Member LSx Heaven's Avatar
    Join Date
    Jul 2008
    Location
    amarillo, texas
    Age
    37
    Posts
    296

    All colors
    1993-2002

    Quote Originally Posted by Frost View Post
    An s88 will run out up top with that many cubes. It pretty much has to be an S90 at the smallest, and you could run bigger. These turbos have no business behind a stock displacement engine.
    I am with him, I was going to say a 91 mm. Good luck

  10. #10
    Junior Member CHRIZ28's Avatar
    Join Date
    Jul 2008
    Location
    Pocahontas, AR
    Posts
    26

    Navy Blue Metallic
    2000 Z28

    Quote Originally Posted by Frost View Post
    An s88 will run out up top with that many cubes. It pretty much has to be an S90 at the smallest, and you could run bigger. These turbos have no business behind a stock displacement engine.
    Yes, definatly. Just whenever you get ready to do the big ci motor, take your time and talk to alot of shops/knowledgeable turbo people. I got like 3 different turbos suggested for my 408. All were WAY different turbos, now I understand when I see a turbo car that seems slower than it should be at the track...

    Chris

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. looking for info on turbo size?
    By 99transamC/FIA in forum General Help
    Replies: 2
    Last Post: 05-17-2008, 01:27 PM
  2. injector size for turbo application using a T70
    By spooled88monte in forum Forced Induction
    Replies: 8
    Last Post: 02-15-2008, 08:03 PM
  3. Replies: 0
    Last Post: 09-29-2007, 06:50 AM
  4. Replies: 0
    Last Post: 10-15-2006, 09:37 PM
  5. APS C5 intercooled twin turbo system - MSRP inside
    By peter@aps in forum Forced Induction
    Replies: 0
    Last Post: 10-15-2006, 09:32 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •