Race Tech Magazine, July 23, 2013
Life is never easy for the valves in a racing engine. The pounding they received from the rocker arms is merciless, particularly in high revving applications or those where heavy duty valve springs are used.Race Tech Magazine
The situation is bad enough with steel or stainless steel valves, but things can reach breaking point when a comparatively soft material like titanium is used. One solution is to beef up the valves with hardened tips, but that only solves part of the problem – you still have a very limited contact area between the valve stem and the rocker arm.