How doe valve lag improve the performance of an engine?

Valve lag improves engine performance by allowing for better control of the intake and exhaust processes. By delaying the opening or closing of the valves, it can enhance the flow of air and fuel into the combustion chamber, optimizing the timing of combustion and improving efficiency. This results in smoother power delivery and increased torque, particularly at various engine speeds. Furthermore, valve lag can help reduce emissions by ensuring more complete combustion.