Belt 27mm BBC +1.00 Raised Cam

The Belt 27mm BBC +1.00 Raised Cam is a precision-engineered timing component designed for serious big-block Chevrolet (BBC) engine builders and performance enthusiasts. This specialty belt drives the camshaft in high-output BBC applications where stock timing geometry has been modified or upgraded to increased lift and duration specifications. Built for compatibility with 1.00-inch raised cam profiles, this belt is essential for builders running custom valvetrain packages that demand exact synchronization between crankshaft and camshaft rotation. Whether you're assembling a street strip engine, marine application, or dedicated race powerplant, proper camshaft drive belt selection directly impacts valve timing accuracy and overall engine reliability.

The 27mm belt width and +1.00 raised cam designation indicate this component is engineered for specific BBC cylinder head and block combinations where the camshaft centerline has been offset upward by one inch relative to factory positioning. This geometry change—common in ported, big-valve, and high-RPM builds—requires dedicated belt sizing to maintain proper cam timing and prevent belt slip under load. The belt's tensioning characteristics and tooth engagement are calibrated to handle the increased valve spring pressures and RPM demands of performance valvetrains. Weighing just 0.26 lbs with compact dimensions (5.85 x 1.6 x 12.8 inches), this belt integrates seamlessly into custom BBC engine bays while delivering the durability needed for extended track use and high-boost applications.

This belt suits BBC engine builders, performance shops, and race teams developing engine packages with non-standard cam profiles and raised valve timing geometry. Installation requires precise belt tension measurement and alignment verification—consult your engine builder's specifications or manufacturer guidelines for proper setup. Correct belt selection prevents cam timing walk, reduces parasitic drag, and ensures consistent valve event execution across the full RPM range. For engines running superchargers, nitrous, or extreme boost pressures, this precision timing component becomes critical to avoiding catastrophic cam/piston interference and maintaining stable power delivery.