# How to Calculate Compression of a Motor?

The compression (or compression ratio) of a motor is a valuable indicator of a motor's efficiency. The compression ratio is defined as the ratio of the volume in the combustion chamber from the gre... Read More »
http://www.ehow.com/how_7356654_calculate-compression-motor.html

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## How to Check Compression on an Outboard Motor?

Performing periodic compression checks on your outboard engine can help indicate the condition of its internal combustion parts, including the head gasket, piston rings and pistons, valves and cyli... Read More »
http://www.ehow.com/how_7725680_check-compression-outboard-motor.html

## How to Calculate Compression?

Scientists and engineers calculate the compression of an object as the force on the object in pounds divided by the area in square inches that the force is applied. This action upon an object is al... Read More »
http://www.ehow.com/how_6805859_calculate-compression.html

## How to Calculate Engine Compression?

The compression of an engine is expressed in a ratio that says how many units of volume from the cylinder with the piston at the bottom dead center are squeezed into a unit of space in the compress... Read More »
http://www.ehow.com/how_5017368_calculate-engine-compression.html

## How to Calculate Compression Ratio?

An engine's compression ratio will dictate how it will perform. In general, if the volume of the cylinder when the piston is down is greater than the combustion chamber volume when the piston up, t... Read More »
http://www.wikihow.com/Calculate-Compression-Ratio

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