COMP Cams Camshaft CB 47S 313-R10

This COMP Cams CB 47S 313-R10DR47 camshaft is a solid roller type designed for Chevrolet Big Block engines, specifically the 396 to 454 cubic inch displacements. It features a 4/7 cylinder firing order swap, which can help improve exhaust scavenging and overall engine performance in drag racing applications. This camshaft is intended for engines originally equipped with flat tappet camshafts and is a good choice for Super Gas racing, engines with 11:1 or higher compression, a 4500+ RPM stall speed converter, and displacements ranging from 427 to 468 cubic inches.

The CB 47S 313-R10DR47 camshaft has a duration of 276 degrees intake and 284 degrees exhaust at 0.050 inch lift. Its solid roller design means it requires roller lifters, roller rocker arms, and appropriate valve springs, which are not included with the camshaft. The 4/7 swap design is a notable feature that sets it apart from standard firing order cams, potentially leading to improved cylinder head filling and exhaust port flow. This camshaft is built for high-RPM operation and is a well-built component for serious drag racing builds.

It's important to note that this camshaft is not CARB approved and cannot be shipped to California. Also, be aware that 1965-1966 396 Big Block engines with an oiling groove in the rear journal are not compatible with this specific camshaft. If your engine requires that oiling groove, you will need to contact COMP Cams directly for a different part number.