![]() ![]() This happens when valve spring tension is insufficient to keep the valve following the cam at its apex. To a point, the further the valve rises from its seat the more airflow can be released.Īt very high RPM, valve bounce may result. In proper sequence, these series of events produce an efficient and strong-running engine. The valve springs push them closed on their return. Lobes on the camshaft push against the push rods and rocker arms to open the valves as the camshaft rotates. This, along with the cam profile, determines the flow of the air/fuel mixture ratio. Vehicle weight, engine compression, cylinder heads, valve size, transmission type, and other factors must all be considered.Ĭamshaft basics start with the relationship between the rotation of the camshaft and the rotation of the crankshaft. Camshaft selection dictates which engine components will work well together. ![]()
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