# 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...
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http://www.ehow.com/how_7356654_calculate-compression-motor.html

## 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...
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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...
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http://www.ehow.com/how_6805859_calculate-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...
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http://www.wikihow.com/Calculate-Compression-Ratio

## How to Calculate Compression Pressure?

Calculating (actual) compression pressure in automotive engines is not a straightforward process of comparing the cylinder's maximum and minimum dimensional volumes as the piston travels through it...
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http://www.ehow.com/how_6453303_calculate-compression-pressure.html