This tool determines the stiffness of a mechanical component designed to return a valve to its closed position in an engine. It quantifies the force required to compress the spring a specific distance, typically expressed in pounds per inch or Newtons per millimeter. As an example, a device with a rate of 300 lbs/in requires 300 pounds of force to compress it one inch.
The determination of this measurement is crucial for engine performance and reliability. An insufficient value may lead to valve float, where the valve does not fully close during high engine speeds, resulting in power loss and potential engine damage. Conversely, an excessively high value can increase friction and wear on engine components, reducing power and lifespan. Historically, mechanical calculations or physical testing were required, but modern tools automate and simplify the process.
