Test compression with engine at normal operating temperature, spark plugs removed, all injector connectors and cold start valve disconnected, throttle valve fully open and engine at cranking speed (300 RPM).
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| Pickup, Maxima & 300ZX | 9.0:1 | |
| 300ZX Turbo | 7.8:1 | |
| Normal Compression Pressure | ||
| Maxima, Pickup & 300ZX | 173 psi (12 kg/cm 2 ) | |
| 300ZX Turbo | 165 psi (11 kg/cm 2 ) | |
| Minimum Compression Pressure | ||
| Maxima, Pickup & 300ZX | 128 psi (9 kg/cm 2 ) | |
| 300ZX Turbo | 121 psi (8 kg/cm 2 ) | |
| Max. Variation Between Cylinders | 14 psi (1 kg/cm 2 ) | |
COMPRESSION SPECIFICATIONS