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Thread: 86'250r piston differences

  1. #1
    Join Date
    Jan 2009
    Location
    s. louisiana
    --
    38

    86'250r piston differences

    Started doing a rebuild got my new wiseco piston and noticed that the one that's in it has pointy skirts and the new one has beveled like skirts, my question is is the piston that's pointed the wrong piston or is it just brand design? Thanks.

  2. #2
    Join Date
    Oct 2002
    Location
    Fresno Ca
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    2,695
    Rouneded edges on a piston help stop cracking. If they where having a problem they might have changed the design some.

  3. #3
    Join Date
    Jul 2005
    Location
    Richland WA
    --
    808
    sharp edges are bad, they shear oil off. I always polisth them with a fine file and/or sandpaper before installation.

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