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Thread: LS1 compression vs boost

  1. #1

    LS1 compression vs boost

    Hi guys, I'm currently building a 2003 LS1 engine.
    I'm running ARP studded bottem end, standard crankshaft, SCAT forged H-Beam rods 6.100"
    I'm also going to be running a T04Z turbo with a front mount intercooler.

    The 38mm external Tial wastegate I purchased came with 2 pressure springs one at 9psi and the other at 14.4psi.

    Before I purchase pistons I have 2 questions, firstly what pistons should I be using forged or hyper with boost ?
    Secondly what compression ratio would you recommend I run for 9psi and or 14.4psi.
    I guess I need these questions answered before I purchase pistons so I can purchase a set which will lower my CR to what is required.

    I will be using 64cc heads also.

    Any advice would be helpful.
    Cheers Rick
    Last edited by RickAbraham; 04-12-2014 at 11:33 PM.

  2. Racing Junk

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