Engine CompressionAtmospheric pressure at sea level is approximately 14.7 psi.A 9:1 compression ratio cylinder is compressing the air and fuel mixture to about 132 psi at sea level (9x14.7=132.3 ...

An engine compression test kit consists of a pressure gauge and an assortment of hoses and fittings so that the gauge can be connected to the spark plug holes on each of an engine's cylinders. To ...

An engine compression test kit consists of a pressure gauge and an assortment of hoses and fittings so that the gauge can be connected to the spark plug holes on each of an engine's cylinders. To ...