Watts Shop Performance How to figure Torque
Torque = Horsepower X RPM / 5252
How to figure Swept Volume in cubic inches
Bore x Bore x Stroke X .7854 = Swept Volume

Example: 4.25 x 4.25 x 4 x .7854 = 56.74ci
How to figure Gasket Volume in cubic inches

Example: 4.25 x 4.25 x 0.051 x .7854 = 0.72ci
How to figure Deck Height Volume in cubic inches
Bore x Bore x Deck Height x .7854 = Deck Height Volume

Example: 4.25 x 4.25 x 0.005 x .7854 = 0.07ci
How to Convert Combustion Chamber Volume from CC's to CI's
Multiply CC's x 0.061

Example: 64cc x 0.061 = 3.9ci
How to Convert CI's to CC's
Multiply CI's x 16.41

Example: 3.9ci x 16.41 = 64
How to figure Volume at TDC
Chamber + Gasket + Deck Height + Piston Dish = Volume at TDC

Example: 3.9ci + 0.72ci + 0.07ci + 1.22ci = 5.91ci
How to figure Volume at BDC
Cly + Chamber + Gasket + Deck + Piston Deck = Volume at BDC

Example: 56.74ci + 3.9ci + 0.72ci + 0.07ci + 1.22ci = 62.65ci
How to figure Compression Ratio
Divide Volume at BDC by Volume at TDC

Example: 62.65ci / 5.91ci = 10.60 to 1