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The Ilmor MV8 Ocean Performance Series (OPS) engines are designed for salt-water use or other closed cooled applications. Available in all three displacement variants, OPS engines provide superior temperature control compared to an open cooled system and enhance catalyst performance through temperature control. The OPS engines also ensure fuel and spark optimization throughout the engines' operating range. Finally, OPS engines offer full system corrosion protection and utilize environmentally friendly coolant.



Number of Cylinders8


Power Rating239 kW @ 5000 RPM (320 HP)

Peak Torque365 ft-lbs @ 4200 RPM

Compression Ratio9:4:1

Valve ConfigurationOverhead Valves (2 per cylinder)

Valve LiftersHydraulic Roller

Firing Order1-8-4-3-6-5-7-2

Bore and Stroke101.60 x 88.39 mm

Bore Center111.76 mm

Engine Weight (with V-drive transmission)1098 lbs (499 kg)

Emissions ControlsCatalyst, O2 Sensor, ECU Controlled, OBD-M


Cylinder BlockCast Iron

Cylinder HeadCast Iron

Intake ManifoldCast Aluminum Upper and Lower

Exhaust ManifoldCast Iron

CrankshaftNodular Iron

Connecting RodsForged SAE 1141