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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

Example: 4.25 x 4.25 x 4 x .7854 = 56.74ci

How to figure Gasket Volume in cubic inches

Bore x Bore x Gasket Thickness x .7854 = Gasket Volume

Example: 4.25 x 4.25 x 0.051 x .7854 = 0.72ci

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

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

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

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

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

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

Example: 62.65ci / 5.91ci = 10.60 to 1