Buick 400-430-455
Advertised Duration: 269/269
Duration @ .050": 215/215
Valve Lift w/1.60 Rockers: .475/.475
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
1000-5000. Good idle, mild street performance, strong low end torque.

Buick 400-430-455
Advertised Duration: 275/275
Duration @ .050": 221/221
Valve Lift w/1.60 Rockers: .501/.501
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: Hyd./Hyd.
1200-5200. Fair idle, performance street, strong torque curve.

Buick 400-430-455
Advertised Duration: 279/285
Duration @ .050": 225/231
Valve Lift w/1.60 Rockers: .496/.501
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
1500-5500. Fair idle, hot street, needs modified intake & exhaust.

Buick 400-430-455
Advertised Duration: 289/295
Duration @ .050": 235/241
Valve Lift w/1.60 Rockers: .520/.501
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
2000-6000. Nice idle, street/strip for 430+ ci., monster torque.

Buick 400-430-455
Advertised Duration: 294/301
Duration @ .050": 241/247
Valve Lift w/1.60 Rockers: .536/.544
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: Hyd./Hyd.
2400-6400. Rough idle, street/strip, needs 2500+ stall, aftermarket intake & headers.

Buick 400-430-455
Custom Grind

Buick 400-430-455
Cam Series: Street Force
Advertised Duration: 259/269
Duration @ .050": 205/215
Valve Lift w/1.60 Rockers: .448/.474
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
1000-5000. Street Force 1, good idle, mild street performance, strong low end torque.

Buick 400-430-455
Cam Series: Street Force
Advertised Duration: 269/279
Duration @ .050": 215/225
Valve Lift w/1.60 Rockers: .474/.496
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
1200-5200. Street Force 2, good idle & throttle response, needs 4 barrel & good exhaust.