Lunati 10120705 Voodoo Hydraulic Camshaft V284H-10 Hydraulic Camshaft for Small Block Chevy 284/292 Advertised Duration, 241/249 Duration at .050", .525"/.546" Lift, 110 Lobe Separation 2500 - 6600 RPM range Designed for very hot street/bracket race applications, this cam requires a minimum of 10.5:1 compression, 4.11 gearing and 3500 RPM stall converter. Works with up to 250 HP nitrous, and pulls very hard past 6500 RPM when coupled with the correct parts