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State the main advantage of an overhead cam arrangement compared to valve arrangement?

The main advantage of an overhead cam arrangement compared to a pushrod and rocker arrangement is reduced reciprocating mass.

* In an overhead cam (OHC) arrangement, the camshaft is located in the cylinder head, directly over the valves. This eliminates the need for long pushrods and rockers, which can add significant mass to the valvetrain.

* This reduction in reciprocating mass allows the engine to operate at higher RPMs without sacrificing valve control.

* In contrast, a pushrod and rocker arrangement requires long pushrods and rockers, which add significant mass to the valvetrain. This increased reciprocating mass limits the engine's ability to operate at high RPMs.

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