COMP Cams Camshaft CB 47S 318Rxd-14

Starting with a 285/300 degree duration at .050 lift, this COMP Cams solid roller camshaft is built for serious drag racing applications on Chevrolet Big Block engines. It's specifically designed for use with high ratio rockers, like 1.8 and 1.7 ratios, and is intended for Quick 16 and Eliminator classes where maximum performance is key. This camshaft is a 4/7 swap design, which helps improve exhaust scavenging and can lead to better cylinder filling and more power. It's intended for engines originally equipped with flat tappet camshafts, and is a direct fit for many Chevrolet models from the late 60s through the mid-90s, including popular choices like the Chevelle, Camaro, and Impala.

This camshaft is a solid roller type, which means it uses roller lifters to reduce friction compared to flat tappet designs. This lower friction allows for more aggressive cam profiles and higher RPM operation, crucial for drag racing. The extended description mentions its suitability for large cubic inch engines, suggesting it can handle the demands of 396, 427, 454, and even larger displacement BBC builds. It's important to note that this specific part number is not compatible with 1965-66 396ci Big Blocks that feature an oiling groove in the rear journal; for those specific applications, a different camshaft is required.

When installing this camshaft, ensure you have the correct valve springs, pushrods, and lifters to match the solid roller design and the aggressive profile. Because this is a performance camshaft, it's often paired with other engine upgrades to take full advantage of its capabilities. Always refer to the manufacturer's installation instructions for proper setup and break-in procedures to ensure longevity and optimal performance.