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-   -   Which cylinder alloy do I have... (http://forums.pelicanparts.com/911-engine-rebuilding-forum/480170-cylinder-alloy-do-i-have.html)

QueensEng 06-15-2009 12:39 PM
Which cylinder alloy do I have...
 
I'm in the teardown/cleaning phase of my rebuild and I'm trying to figure out whether I have Nikasil or Alusil cylinders, someone like to shed some light? (see photo)http://forums.pelicanparts.com/uploa...1245098337.jpg

tom1394racing 06-15-2009 01:34 PM
From the date stamp of '81 on the heads, it appears that you have a late SC motor. On the SC you need to count the fins on the cylinder to tell the difference.

http://forums.pelicanparts.com/911-engine-rebuilding-forum/453063-nikasil-alusil.html?highlight=alusil

11 fins = Nikasil

10 fins = Alusil


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