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    • F80 M3 with forged rods and pistons plus Gintani S55 crank hub fix making 737 rwhp with Pure Stage 2+ turbochargers

      This is the proper way to do it. Yes, you can do well over 700+ wheel horsepower on factory S55 internals. It's just a question of for how long. This owner upgraded his pistons and rods plus added the Gintani S55 crank hub fix kit for peace of mind.


      Mod list:

      - Custom tune
      - Pure Stage 2+ turbos
      - Fuel-It! Port injection and LPFP
      - Gintani crank hub fix kit
      - Pauter rods and Wiseco pistons
      - Upgraded DCT clutches

      737 rear wheel horsepower and 655 lb-ft of torque at the wheels:


      That is a great looking curve with power building all the way to the top.

      As for the fuel used, boost, and correction factor, @Peter @ Pure/PTF will need to chime in below in the comments.

      This article was originally published in forum thread: F80 M3 with forged rods and pistons plus Gintani S55 crank hub fix making 737 rwhp with Pure Stage 2+ turbochargers started by Sticky View original post
      Comments 10 Comments
      1. maristgrad09's Avatar
        maristgrad09 -
        Any idea how much a pistons and rods package isnfor an s55?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by maristgrad09 Click here to enlarge
        Any idea how much a pistons and rods package isnfor an s55?
        I don't know.
      1. Peter @ Pure/PTF's Avatar
        Peter @ Pure/PTF -
        Its on E75 / meth fuel. More is possible but this car gets valve float issues early.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Peter @ Pure/PTF Click here to enlarge
        but this car gets valve float issues early.
        Headgames can take care of that...
      1. Peter @ Pure/PTF's Avatar
        Peter @ Pure/PTF -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Headgames can take care of that...
        Yeah we have that running in our shop car. Customer may do that next year.
      1. Jerain's Avatar
        Jerain -
        Do I read it wrong or does that torque curve look really bad?
      1. CobraMarty's Avatar
        CobraMarty -
        How much boost for that power?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
        How much boost for that power?
        @Peter @ Pure/PTF
      1. Peter @ Pure/PTF's Avatar
        Peter @ Pure/PTF -
        Around 32-33 psi only
      1. CobraMarty's Avatar
        CobraMarty -
        Click here to enlarge Originally Posted by Peter @ Pure/PTF Click here to enlarge
        Around 32-33 psi only
        At that boost, it doesn't surprise me you get early valve float issues.
        New upgraded valve springs and you're golden.