SBC Roller Camshaft

The ISKY Cams SBC Roller Camshaft (part number 201653) is a mechanical roller camshaft engineered for small block Chevy oval track competition engines. This camshaft delivers a lift profile of 0.650 inches on the intake side and 0.645 inches on the exhaust side, with a duration of 290 degrees intake and 302 degrees exhaust—tuned for aggressive power delivery across the 4000 to 7600 RPM operating range. The 106-degree lobe separation angle (LSA) provides the aggressive overlap characteristic necessary for high-RPM scavenging on the dirt track.

Roller camshaft technology reduces friction at the lifter interface compared to flat-tappet designs, translating to lower parasitic losses and more power reaching the wheels. The asymmetrical intake and exhaust duration and lift specifications—with longer, higher-lift intake and extended exhaust duration—optimize breathing for the specific demands of oval track racing where sustained high RPM operation is essential. The 106 LSA is designed to maximize cylinder charge density while maintaining adequate exhaust scavenging, a critical balance for competitive engine builds targeting consistent power output lap after lap.

This camshaft is specified for small block Chevy platforms and suits engine builders and racers competing in dirt track oval racing series where small block Chevy power plants remain popular. The mechanical roller design requires proper valvetrain geometry and lifter setup; builders should verify cam core height, pushrod length, and rocker arm ratio compatibility before installation. Oval track racers relying on proven, task-specific cam profiles will recognize ISKY's reputation for delivering repeatable performance in competitive environments where marginal gains in efficiency and power delivery compound across a full season.