Camshaft Profiling
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Roller-tappet cams can achieve higher velocities than flat-tappet cams with the same amount of lift, which creates more area under the curve; i.e., more power at lower valve lifts (1). On the other hand, a flat-tappet cam has greater initial acceleration, reaching higher lift more quickly than a roller cam until the latter reaches its maximum velocity (2). This can be an advantage when running a short-duration cam. View Related Article
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