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78E to 81G 8 valve parts interchangability (top end)?

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    #16
    Ed,

    Yesterday I checked 12140-49001, they were $32.24 a set @ partshark. if you check alpha sports P/N 12140-44110 (replaces 12140-49001-100) is for the 1.0mm O/S.

    that is unless I'm reading things wrong.
    De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

    http://www.thegsresources.com/_forum...35#post1625535

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      #17
      Just looked at Partshark. Standard pistons are the same price, but oversize rings are less expensive.
      Std:
      Piston 12111-49001 $53.21 ea $212.84 for 4
      Ring set 12140-49001 $32.24 ea $128.96 for 4 / total $341.80 for all

      The 1mm oversize:
      Piston 12111-49001-100 $53.21 ea $212.84 for 4
      Ring set 12140-44110 (replaces 12140-49001-100) $25.35 ea $101.40 for 4 / $314.24 for all

      I have an engine builder program (Dyno 2000) & I'm trying to find some specs for the stock motor so I can play around with a few things to see what type of benefit they may have.

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