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Thread: 2.0 E piston top

  1. 11-07-2008, 09:55 AM #1
    Mudi
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    2.0 E piston top

    Anybody have a picture of one?? is it the same as the 2.0 S piston top?? Thanks,
    Bob Petitt
    1967 911S Coupe 307653S, my barn find - 55,000 miles Looking for engine #961269 and trans 901/02 #104337
    1971 911T Coupe 9111120264, my first 911 back in my garage
    1972 BMW 2002, my first car - 350,000 miles and counting
    1972 911T Coupe 9112100970, Sporto, parted it out..
    1983 BMW 320i, my everyday car - 138,000 miles and gutless
    2005 Subaru Outback, the daily driver - boring
    2006 Volvo XC90,

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  2. 11-07-2008, 10:23 AM #2
    kenikh
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    No...very different; shallower crown and shallower valve pockets for the E. No pictures handy other than the ones in my head.
    Kenik
    - 1969 911S
    - 1965/66 911
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  3. 11-07-2008, 12:17 PM #3
    Grady Clay
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    I agree, sorta. The piston top stayed mostly the same ’65 911 through ’69 911E. The piston is a cast aluminum version with a full skirt and 9.0:1 CR for the ’65-’68 911 and 9.1:1 for the ’69 911E. There were various ring changes early on. All of these pistons used a Biral cylinder.

    A 911S piston is very different. Aside from the higher piston top to achieve 9.8:1 or 9.9:1 CR and the valve relief to accommodate larger valves and higher lift, these were forged aluminum pistons with ‘slipper-skirt’ design and (naturally) all the rings above the wrist pin. Again a Biral cylinder was used.

    Best,
    Grady
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