cheap high compression pistons?

  • Zedman
    Zedman
    Member
    • 60

    cheap high compression pistons?

    Does anyone know a cheap alternative for some higher compression pistons for a na build looking for about 12:1** compression? Looking to spend under $500
  • Matt89
    Matt89
    Senior Member
    • 2380

    #2
    Cheap?? You could always get some high temp jbweld and pour it through the spark plug hole. Make sure to measure right so you get even compression accross all cylinders.





























    DISCLAIMER: If you try this i am not responsible for the consequences of this high performance engine mod.
    Bolt on, fast, z31. You can only pick two.
    Old weaksauce numbers: 391hp/433tq

  • NIVO
    NIVO
    Senior Member
    • 1340

    #3
    A high compression build and you want 12:1 pistons but under $500? I know where this is going.

    its gonna cost u twice that if you go with Z32 Non Turbo pistons and rods, but still you will not get the 12:1.
    Gone - 1988 Shiro
    2004 BMW 330Ci
    2005 BMW 330i
    1991 Twin Turbo Z's (Red and Black)
    http://www.E46Turbo330Ci.com
  • Zedman
    Zedman
    Member
    • 60

    #4
    i was just wondering whether you could get some pistons etc from another engine that will boost it up for that price, don't need it brand new or anything,

    BTW: say i put z32 na pistons in it and a copper head gasket, what would you thyinhk it would set the compression to roughly, any real performance gains???
  • XiOus271
    XiOus271
    Senior Member
    • 362

    #5
    Generally from what I have seen, most Z31's running Z32 pistons generally work out to say… 9.5:1 in a Z32 but somewhere in the neighborhood of 8.0-8.5:1 on a Z31. Do not go cheap with bottom end parts, do it right the first time, get decent parts.
    1986 300ZX Turbo - Sold
    1991 Toyota MR2 - RIP
    2007 BMW 335i - Daily driver
  • G-E
    G-E
    Junior Member
    • 6320

    #6
    how about unequivocally stating the obvious, 12:1 will require some serious effort on the pistons