Comp Cams 11-771-8 - Comp Cams 'Xtreme Energy' Mechanical Roller Camshafts
Comp Cams #249-11-771-8Xtreme Energy XR280R Mechanical Roller Camshaft OnlyLift: .646''/.653'' Duration: 280°/286° RPM Range: 2500-6500 |
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Comp Cams 11-771-8 - Comp Cams 'Xtreme Energy' Mechanical Roller Camshafts Details
Chevy 396-454ci Big Block 1965-96
*Note: In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16'' wide x 7/64'' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.
** Note: Requires thrust button & wear plate.
Best in street machines with 2800+ stall converter, 10:1 or more compression with 3.73-3.90 gears.
Operating Range: 2500-6500 RPM Duration Advertised: 280° Intake / 286° Exhaust Duration @ .050'' Lift: 242° Intake / 248° Exhaust Valve Lift w/1.7 Rockers: .646'' Intake / .653'' Exhaust Valve Setting: .016'' Intake / .018'' Exhaust Lobe Separation Angle: 110°
The Leading Edge of Valve Train Technology Comp Cams Xtreme Energy series camshafts can be used in any street or street/strip application where both throttle response and top-end horsepower is desired. These cams are designed to take advantage of the latest improvements in valve train components and the newest developments in camshaft design. Their aggressive lobe design produces better throttle response and top end horsepower than other cams with the same duration @ .050'' lift, while delivering increased engine vacuum. We do not recommend the use of stock valve train components with these camshafts due to the aggressive lobe designs..
Camshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft and Lifters.
Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Spring Retainers, Spring Locks and Valve Springs.
Small Kits are indicated by a SK in their part number and include Camshaft, Lifters, Timing Chain Set, Assembly Lube, Decals, and Instructions.
