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1989
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911 Turbo, 2D Convertible
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Engine Compression
Engine Compression
COMPRESSION SPECIFICATIONS
Application
Specification
Compression Ratio
9.5:1
Compression Pressure
Normal
142-184 psi (10-13 kg/cm
2
)
Minimum
107 psi (7.5 kg/cm
2
)
Maximum Variation Between Cylinders
22 psi (1.5 kg/cm
2
)