If you build the same 350 engine with longer 6-inch rods, the rod ratio becomes 1.72. Finally, multiply the result by the stroke to determine the swept volume of the engine. Then, square the result and multiply it by, which is 3.14. Your Marvel Mystery Oil and a six pack and get ready to party. The rod ratio in this engine would be 5.7 (rod length) divided by 3.48 (stroke), which equals 1.64. Use the formula (cylinder diameter / 2)2 x x stroke to find the swept volume. Light, non-nasty grease, your handy dandy plexiglass or lexan sheet, Enter a positive number for aĭished or dimpled piston. EnterĪ negative number for a domed piston. do it yourself or call the piston manufacturer. At TDC the piston will "rock" so be careful in Engine Size: Max RPM: Volumetric Efficiency: Carburetor Size: CFM Learn how we calculated this below Add this calculator to your site By Joe Sexton How to Calculate the Carburetor Size for an Engine Equipping your engine with the right size carburetor is critical to maximize the performance of the motor. DYNAMIC EFFECTIVE COMPRESSION RATIO : Submit. On 113/135" ORCA motors it is 0.00 because they use metal seals and no head gaskets.ĭistance between the flat top surface of the piston (not the top of aĭome or the bottom of a valve relief) and the top of the cylinder.Įnter a negative number if the piston's flat surface sticks up past the ENTER YOUR DATA CALCULATED DATA Cylinder Head Volume (cc) Cylinder Head Vol (cubic in.).
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