[Fot] TR4 head milling

[fubog1]

 Yes, a slight piston dome, I use around 6cc, eliminates the need to cut the head so much, & doesn't interfere w/flame travel/combustion.When you get down to around 3.150 thick, things get iffy...
Also when establishing CR, book recommendations are just that, general starting points; valve head type & seat depth affect chamber volume, so it's best to cut the head after all else has been established.
Glen Efinger

    On Sunday, April 7, 2024 at 02:36:01 AM EDT, tr4 via Fot <fot at autox.team.net> wrote:  
 
 I have never had to go that far.  The problem would be not the combustion chamber but the flat surface would be way too thin and collapse in short order.  You would be much better off with popping the piston or go with a slight done to get that level of compression.


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-------- Original message --------From: GREGORY THOMPSON via Fot <fot at autox.team.net> Date: 4/5/24 6:36 PM (GMT-06:00) To: FOT Triumph <fot at autox.team.net> Subject: [Fot] TR4 head milling 
Has anyone had an issue with breaking into a water jacket on the TR4A head with taking off .150?
Thank you,
Greg Thompson _______________________________________________
fot at autox.team.net

http://www.fot-racing.com

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