Bore


displacement = number of cylinders x 3.14 x (bore / 2)2 x stroke

maximum rpm due to mass = 0.0056 x displacement2 - 8.89 x ci + 11527


Bore_123rf

Pictured is the top of an engine block. The cylinders are bored into the block. The bore measurement you use for HiPerMath and real life is the diameter of each cylinder.


What you do:

Choose a bore that give you the power you want and the rpms (revolutions per minute) you want.


Factors to consider:

1. Bore is the diameter of the cylinder and it is measured in inches.

2. The larger the bore, the more torque your engine will have. Larger bores draw more air into the engine per rpm, so they develop horsepower faster (at lower rpms), which means they have more torque.

3. The larger the bore, the lower the maximum rpm of the engine. Larger bores require larger pistons to fill them. Larger pistons have more mass. The more mass you try to spin, the lower the rate at which you can spin it before it breaks.


The HiPerMath equations are:

displacement = number of cylinders x 3.14 x (bore / 2)2 x stroke

maximum rpm due to mass = 0.0056 x displacement2 - 8.89 x ci + 11527


Definitions:

displacement = how many cubic inches (in3) your engine is.
stroke = the distance the piston travels from top to bottom in the cylinder.
bore = the diameter of the cylinder.
rpm = revolutions per minute