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  • Users: usac24
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  1. usac24

    Valve Spring Power Consumption

    I've seen various claims of valve spring power consumption of 20-35% of gross power for 2-valve pushrod engines. In our own application, inline 4-cylinder w/peak horsepower of 335@6400RPM, I can calculate approximately 100HP used to open the valves. This was based on the work done from the cam...

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