I have a hard time believing you have 85 HP and 550 lb-ft. In metric that is 63kw/745Nm. Sorry, but that is not right. Unless you're talking about after the gearbox, which will change depending on what gear you're in. But at the flywheel, no way.
OK I just looked it up.
91kW (121HP) at 4000rpm, torque: 272Nm (200lb-ft) at 2000rpm
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