Cylinder Bore Diameter based on the engine displacement number of cylinders and the stroke length. Calculate the area of the circular base. The Volume of a Cylinder To find the volume of a cylinder you just need to multiply the circular base by the height.
Find the radius of the circular base.
You can calculate your engines compression ratio based on what you think the combustion chamber volume in your cylinder heads might be and what the catalog says the volume of the valve pockets in your pistons should be--but you are really just hoping unless you can verify it. Its value varies from compres- sion to combustion to expansion. Volume p x bore radius squared x exposed cylinder height. The ratio of the specific heat of the fuel at constant pressure to the specific heat at constant volume is g.