Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 293/301Duration @ .050": 261/269Valve Lift w/1.70 Rockers: .680/.680Lobe Separation Angle: 110Intake Centerline: 1063400-7300. Nice bracket cam, lopey idle, needs higher stall & lower gear.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 293/301Duration @ .050": 261/269Valve Lift w/1.70 Rockers: .680/.680Lobe Separation Angle: 112Intake Centerline: 1083400-7400. Nice bracket cam, lopey idle, needs higher stall. NOS OK.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 293/301Duration @ .050": 261/269Valve Lift w/1.70 Rockers: .680/.680Lobe Separation Angle: 114Intake Centerline: 1103400-7500. Pro-street, great blower cam. Multiple carb suggested.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 293/303Duration @ .050": 261/271Valve Lift w/1.70 Rockers: .703/.708Lobe Separation Angle: 108Intake Centerline: 1043500-7500. Good mid-range torque & horsepower. 12.0:1 minimum.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 293/303Duration @ .050": 261/271Valve Lift w/1.70 Rockers: .703/.708Lobe Separation Angle: 110Intake Centerline: 1063500-7600. Good mid-range torque & horsepower. 12.0:1 minimum.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 297/309Duration @ .050": 265/277Valve Lift w/1.70 Rockers: .703/.703Lobe Separation Angle: 108Intake Centerline: 1043800-7600. Rough idle. Good upper rpm horsepower. Auto w/4000 stall. 11.0:1+.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 297/309Duration @ .050": 265/277Valve Lift w/1.70 Rockers: .703/.703Lobe Separation Angle: 110Intake Centerline: 1063800-7700. Rough idle. Good upper rpm horsepower. Auto w/4000 stall. 11.0:1+.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 299/309Duration @ .050": 267/277Valve Lift w/1.70 Rockers: .731/.737Lobe Separation Angle: 108Intake Centerline: 1043800-7600. Good mid to upper rpm torque & horsepower. Minimum 4500 stall.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 301/307Duration @ .050": 269/275Valve Lift w/1.70 Rockers: .765/.714Lobe Separation Angle: 108Intake Centerline: 1044000-7800. Good mid-range to upper rpm torque & power. Heavy cars OK.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 301/307Duration @ .050": 269/275Valve Lift w/1.70 Rockers: .765/.714Lobe Separation Angle: 110Intake Centerline: 1064000-7900. Competition use, good mid & upper power, bracket. 11.0:1+ CR.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 301/309Duration @ .050": 269/277Valve Lift w/1.70 Rockers: .680/.680Lobe Separation Angle: 108Intake Centerline: 1044000-8000. Moderate competition. Super mid & upper rpm torque & power.
Chevrolet BB Mark IV 396-502 1965-1996Advertised Duration: 301/309Duration @ .050": 269/277Valve Lift w/1.70 Rockers: .680/.680Lobe Separation Angle: 110Intake Centerline: 1064000-8000. Bracket/super pro, good upper rpm torque & power. 12.5:1 CR & race converter.