Nikasil or Alusil based on engine number?

[RSSweden]

Anyone who knows if it's possible to make out if I have Nikasil or Alusil cylinders based on the engine number? The engine number is 911/92 / 6142169, a 1974 coupe delivered in November 1973.

Thanks!

[Charles Freeborn]

Maybe. I'd start with the Anderson Book.
https://books.google.com/books?id=nPp2_A2zez0C&hl=en"]https://books.google.com/books?id=nPp2_A2zez0C&hl=en

[john walker's workshop]

Count the fins. nikasil 11, alusil 10. niki cylinders are kind of gray, alusils are lighter.

[Bob Kontak]

Originally Posted by john walker's workshop

Count the fins. nikasil 11, alusil 10. niki cylinders are kind of gray, alusils are lighter.

Here is an excerpt from Anderson's book.

https://books.google.com/books?id=rOKlQ0ZzL6cC&pg=PA68&lpg=PA68&dq=What+year+did+Porsche+use+alusil+cylinders?&source=bl&ots=ICipJJfifj&sig=CC392-OXmg3ssi15tctk_6BXEgM&hl=en&sa=X&ved=0CEUQ6AEwBWoVChMI0afXusWfxwIVAs2ACh3hugN0#v=on epage&q=What%20year%20did%20Porsche%20use%20alusil%20cyl inders%3F&f=false