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Thread: does anyone know?

  1. 06-14-2012, 10:54 AM #1
    gdj911
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    does anyone know?

    i'm rebuilding an eng...the mahle jugs have this # 90ZN2. believed to be RS p & C's, does anyone know what it means?
    thank you
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  2. 06-14-2012, 11:55 AM #2
    kentf14
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    90ZN2 are 2.7 RS jugs. You'll have to look at the bottom of the pistons to verify that they are also RS.
    E911SR & RGRUPPE
    '65 911 "The Ol' Gal" (long gone)
    '73 S Coupe #306
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  3. 06-14-2012, 12:37 PM #3
    gdj911
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    piston id seems to be...34p13
    thank you
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  4. 06-14-2012, 01:36 PM #4
    kentf14
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    Hmmm... those pistons should be too small for the 90MM RS jugs. (probably reads 84P13)
    Decent reference table can be found here:

    http://www.early911sregistry.org/for...270-Piston-I.D.
    E911SR & RGRUPPE
    '65 911 "The Ol' Gal" (long gone)
    '73 S Coupe #306
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