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Superior's Scott Emley says, "As long as it passes the usual Magnaflux check, the cast-iron 440 crank is reliable up to 600 naturally aspirated horsepower." And at 67 pounds it weighs 20 percent less than a forged crank, thus cutting rotating mass. But due to the softer journal material (versus a forged crank), regular Clevite 77 bearings are preferred over harder HP-series Clevite bearings so that the bearings take the wear, not the crank. Superior chamfered all oil holes and set oil clearances at 0.0025 for the mains and rods. View Related Article
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