[Fot] TR3 Cyl head Specs

[vfracing at aol.com]

 Hi Paul;
Please find attached a spreadsheet I use to calculate compression ratio, or to determine the head volume needed to get a particular ratio.  Just fill in the information requested in the yellow cells and it should yield what you want.  You will need to measure the volume of the combustion chamber in the head (HV), cell F10.  You should measure all of them because there can be significant variation in the factory head and/or from valve depression due to wear or prior valve jobs.  Head volume measurement ("CCing") kits can be obtained from Summit Racing.  You'll need to measure over 50 cc, so get a big one.  Any issues, feel free to call me.  Eastern time.
Regards,
Phil Gott508 414 0256
    On Saturday, February 22, 2025 at 08:41:37 AM EST, Paul Morro via Fot <fot at autox.team.net> wrote:   

 Hi out there, Would anyone out there have a compression ratio chart for a High Port TR3 head? Or be able to share CR with respect to cylinder head thickness and bore? I'm building a street engine and would like a 9.5:1 CR.Thanks in advance!Paul Morro

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