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Going back to the two-valve / four-valve comparison again (if I may). I understand the effect of the lift height and that the effective restriction area passes from the curtain area to the port area as the valve(s) increase in lift. The figures Dennis.D showed, however, seem to assume identical cam profiles. Would I be right in saying that with smaller, lighter valves more aggressive profiles can be used (higher opening and closing accelerations) even at the same maximum lift? Would this have been done for any of the comparisons?
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