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A way to get a higher compression head without milling the original


TodFitch

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Just noticed this thread on the AACA web site:

 

https://forums.aaca.org/topic/327261-high-compression-head-for-28-std-six/

 

The car owner wanted a higher compression head but wanted to be able to return the car to totally stock in the future. So that ruled out milling the original head. If I read the follow on correctly, he did the milling on an old non-CNC machine so I guess he is pretty talented.

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As for the triangular cuts made into the combustion chamber look up an engineer named Samander Singh.  His theory of groved combustion Chambers was and likely still is a common modification in single cylinder 4 stroke flatheads use in mic rod and go cart racing.  Can't tell from the installed pic but I am thinking this is a rwo piece construction necessitating another gasket for the cooling passage npassage piece to connect to the combustion piece.

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