(Sexy) short skirts !!
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Thread: (Sexy) short skirts !!

  1. #1
    Fellow Frogger! rubyalpine's Avatar
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    Default (Sexy) short skirts !!

    Now that I've got you interested.....
    I've noticed that there are many adverts for high performance pistons with very short cut-away skirts, some just a couple of millimetre below the gudgeon pins.
    Just out of curiosity, I was wondering what the consequences would be if a standard piston was similarly cut away, or alternately, was drilled around the skirt to lighten it!
    Maybe the technical gurus out there can enlighten me, and prevent me from considering doing something stupid.

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    Cheers,
    Henry

  2. #2
    VIP Sponsor 59 Floride's Avatar
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    Damned! caught again....
    Every day when I wake up I reach up in the darkness with my eyes shut and if I cannot feel anything that resembles a wooden lid I know it will be a good day. No lid today.

  3. #3
    1000+ Posts PeterT's Avatar
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    A short skirt is lighter and has less friction. However, they will rock more in the bore, increasing bore wear rate.

    '92 205 Mi16
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    Fellow Frogger! stew's Avatar
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    Not a wise move. Pistons like you describe are for low friction go fast engines. They can be noisy when cold if the machining in the bore is not right. Not a wise choice for street use. As you are aware the piston skirt is not circular and expands with heat to give a close running tolerance. If you lighten the piston then your engine balance goes out and most likely change the expansion shape of the skirt and you must re balance rods and pistons and crank again or the engine gets a vibration. There are better ways to make your engine sweet!.
    PeterT likes this.

  5. #5
    Fellow Frogger! rubyalpine's Avatar
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    Thanks guys.

    Henry

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