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-   -   What material are non turbo 911 heads made from (http://forums.pelicanparts.com/porsche-911-technical-forum/1180240-what-material-non-turbo-911-heads-made.html)

Turbo_pro 07-14-2025 05:22 PM
What material are non turbo 911 heads made from
 
We are looking at welding some 3.0 and 3.2 heads and my welder needs to know the aluminum compound the heads are made of.
I did a search and came up empty.
Thank you for your help.

dannobee 07-15-2025 01:02 AM
"Y" alloy Look on the corner of the combustion chamber side of the head and there will be a spot where those who cast them imprinted the alloy.

https://en.wikipedia.org/wiki/Y_alloy

4043 would probably be your best bet for filler rod.

Turbo_pro 07-15-2025 06:41 AM
Great, thank you.

Turbo_pro 07-15-2025 06:55 AM
Quote:
Originally Posted by dannobee (Post 12498184)
"Y" alloy Look on the corner of the combustion chamber side of the head and there will be a spot where those who cast them imprinted the alloy.

https://en.wikipedia.org/wiki/Y_alloy

4043 would probably be your best bet for filler rod.
How will 4043 react to heat treating? If the heads are exposed to intense heating during the welding process, heat treating might be required/desirable.

An option might be cryo treatment.


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