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How does it fit at the end(s)?

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In the pushrod section of RET-Monitor the reader has been given an insight into the different aspects of pushrod design. Much information has been shared on the specifics of the pushrod concerning its shape, material and contact area of cup and/or bowl. The specifics of the connection between the either hollow or solid centre part of the pushrod has been briefly touched on. In this article the different concepts of connecting the pushrod ends to the centre part are explored further. In...

Going lighter and stronger

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Esslinger Engineering of South El Monte, California, is primarily in the business of building midget engines based on Ford internals. The company has been in this line of work since 1990. Because its engines are not based on pushrod designs, Dan Esslinger, president, says there are not very many valve-spring issues. "It's just the design of the engine and the design of the camshaft," he says. "Even though we turn a lot of rpms (in the neighborhood of 10,000), we are not...

Austenitic steels

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So far in Race Engine Technology's coverage on valves, there have been a number of articles on valve materials for the more extreme applications, specifically pieces on Inconel valves and Nimonic materials used for turbocharged endurance applications. There have also been articles on the lightweight valves, made from low-density materials such as titanium and titanium aluminide.Valves made from these materials are expensive for various reasons, some to do with the price of the raw...