Specifications

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2 . Measurement of compression ratio
Compression ratio is the ratio from the volume imprisoned on the top of the piston at
TDC and the complete volume when piston is at BDC.
There are several ways to measure a compression ratio. The method described in
the next pages require to measure three volumes : volume of piston; volume of
cylinder head gasket and volume of combustion camber.
Then, the compression ratio is calculated with those data.
2.1 - Introduction