Manufacturer's Part Number:
Summit Racing Part Number:
Mechanical roller tappet
Basic Operating RPM Range:
Intake Duration at 050 inch Lift:
Exhaust Duration at 050 inch Lift:
Duration at 050 inch Lift:
238 int./246 exh.
Advertised Intake Duration:
Advertised Exhaust Duration:
288 int./296 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
Exhaust Valve Lift with Factory Rocker Arm Ratio:
Valve Lift with Factory Rocker Arm Ratio:
0.595 int./0.615 exh.
Lobe Separation (degrees):
Intake Valve Lash:
Exhaust Valve Lash:
Valve Springs Required:
Requires cam button spacer. Camshaft incorporates an integral cast iron distributor drive gear. Aluminum-bronze distributor drive gear not required. Also fits Rodeck 481 aluminum engines.
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Crane's mechanical roller camshafts are not for the weak of heart. These camshafts are engineered for operation at ranges that can exceed 10,000 rpm and are the perfect blend of performance and efficiency. While a large number of mechanical roller cams are used in purely competition applications, Crane also manufactures less severe roller grinds that are designed for high performance street engines that have higher compression or power-adders. (For best results, the valve lash must be checked and set periodically.) Crane Cams has the industry's largest database of camshaft profiles. This enables Crane to provide you with camshafts that are ideally suited for your application. If you have a power-eating mean machine, Crane has the perfect camshaft for you!