Engine Compression
Check compression with engine at normal operating temperature, fully open throttle, all spark plugs removed and at normal cranking speed. Crank engine at least 12 "Puffs" per cylinder.
COMPRESSION SPECIFICATIONS
| Compression Ratio | |||||
| 924 | 9.0:1 | ||||
| 924 Turbo | 8.0:1 | ||||
| 944 | 9.5:1 | ||||
| Compression Pressure | |||||
| 924 | |||||
| Normal (New Engine) | 114-156 psi (8-11 kg/cm2 ) | ||||
| Minimum | 85 psi (6 kg/cm2 ) | ||||
| Maximum Variation | 42 psi (3 kg/cm2 ) | ||||
| All Other Models | (1) | ||||
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