Results 1 to 7 of 7

diff between 241s an 317s

This is a discussion on diff between 241s an 317s within the GTO forums, part of the Vehicle Specific category; I've seen some people with the 317 heads. Are these stock for the ls1? and are these the same as ...

  1. #1
    Member derbs's Avatar
    Join Date
    Jun 2006
    Location
    iowa
    Age
    30
    Posts
    276

    IBM
    04 GTO

    diff between 241s an 317s

    I've seen some people with the 317 heads. Are these stock for the ls1? and are these the same as the 241s I have on my 04?

  2. #2
    Member 6.0LiterImportEater's Avatar
    Join Date
    Feb 2009
    Location
    Frederick, MD
    Posts
    187

    Phantom Black Metallic
    2006 Pontiac GTO

    241's are stock for LS1. 317's are stock for my LS2 (6.0L)!!!!

    317 heads on a LS1 are pointless unless you plan on boost. They have larger combustion chambers but you will have to mill them down and lose that just to get your compression up for N/A.

    If your looking for new heads the LS6 is a better choice for a stock LS1 block.

  3. #3
    Senior Member
    Join Date
    Mar 2009
    Location
    Milwaukee
    Posts
    3,260

    Arctic White, red/gray
    1997 Corvette, 92 Typhoon

    Quote Originally Posted by 6.0LiterImportEater View Post
    241's are stock for LS1. 317's are stock for my LS2 (6.0L)!!!!

    317 heads on a LS1 are pointless unless you plan on boost. They have larger combustion chambers but you will have to mill them down and lose that just to get your compression up for N/A.

    If your looking for new heads the LS6 is a better choice for a stock LS1 block.
    Yep, get some nice 243s

  4. #4
    Member derbs's Avatar
    Join Date
    Jun 2006
    Location
    iowa
    Age
    30
    Posts
    276

    IBM
    04 GTO

    i was thinking that the ls2 comes with the 243? guess I need to search into it more.

  5. #5
    Member 05gtoautoX's Avatar
    Join Date
    Jan 2006
    Location
    riverton
    Posts
    556

    Impulse Blue
    2006 Pontiac G.T.O.

    My LS2 came with 243s, which is what they all came with. The 317s are LQ9/LQ4 heads with either a 70CC or 72CC combustion chamber which are great for FI. So get yourself some 243s if you wanna stay low in price and N/A. Otherwise if you have the coin go with TFS,ETP or AFR and make some big power.
    Last edited by 05gtoautoX; 08-19-2009 at 02:30 PM.
    2006 impulse blue G.T.O
    Iron Block 408
    Cam
    Pacesetter ceramic coated L.T.s
    LMII exhaust
    K&N CAI
    Ported TB
    Custom Tune
    FAST 90
    ZEX 125hp wet shot

  6. #6
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,520

    98 Formula
    06 duramax

    317's are 6.0 truck heads and have a 71cc chamber. LS2's came with 243 heads.

  7. #7
    Member 6.0LiterImportEater's Avatar
    Join Date
    Feb 2009
    Location
    Frederick, MD
    Posts
    187

    Phantom Black Metallic
    2006 Pontiac GTO

    My bad for not clarifying...

    243 and 317 are the same casting but there are slight differences. 243 is the GTO and 317 is the trucks.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 241s to stock 243s.... worth it?
    By 02_slp_ss in forum Internal Engine
    Replies: 10
    Last Post: 03-08-2011, 07:49 AM
  2. Need help with diff. ?
    By IHSS in forum General Help
    Replies: 12
    Last Post: 01-17-2011, 01:26 PM
  3. Replies: 8
    Last Post: 11-25-2010, 08:19 PM
  4. What diff do I have?
    By david_viny in forum Drivetrain
    Replies: 6
    Last Post: 03-28-2009, 12:22 PM
  5. best diff fluid? good diff cover?
    By ErikElvis in forum Camaro / SS
    Replies: 3
    Last Post: 03-23-2006, 09:49 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
  •