Big Block Chevrolet, Gen VI, 1.950″ Journal
Coming Soon!
The Allmond Marine Stage 4 is an evolution of the 139661 cam
The intake event (solid line) is optimized for improved dynamics while keeping the valve events the same. Higher max lift and 2.0° of asymmetry for improved volumetric efficiency with modern cylinder heads
LSA of 116° gives equivalent valve events (EVO, EVC, IVC, etc.) to the 139661 cam’s 114° LSA
| Adv. Duration | Duration @ 0.050″ | Duration @ 0.200″ | Valve Lift @ 1.74:1 | Lobe Sep. Angle | |
| Intake | 318 | 257 | 178 | 0.684 | 116 |
| Exhaust | 326 | 264 | 180 | 0.647 |
Valvetrain Requirements
For this cam, consider the valvetrain requirements below. Use the Valvespring Estimation Tool to calculate Valvetrain Effective Mass. If you must exceed this value, contact Allmond Marine.
