# Valve Spring Rate Calculator

Valve Spring Rate: lbs/in

## About Valve Spring Rate Calculator (Formula)

A Valve Spring Rate Calculator is a tool used by mechanics, engineers, and racing enthusiasts to determine the spring rate of a valve spring. The valve spring rate refers to the amount of force required to compress the spring by a given distance.

The formula used by the calculator is

VSR=(OP−SP)/L

Where VSR is the valve spring rate (lbs/in), OP is the open pressure (lbs), SP is the seat pressure (lbs), and L is the lift (in). The open pressure is the force required to fully open the valve, while the seat pressure is the force required to keep the valve closed. The lift is the distance the valve travels when it is opened.

By inputting these values into the calculator, the user can determine the spring rate of the valve spring. The spring rate is an important factor in the performance of an engine as it can affect the timing and duration of the valve opening and closing. By selecting the appropriate valve spring rate, the user can ensure that the engine operates at its optimal level.

In conclusion, the Valve Spring Rate Calculator is a useful tool for anyone working on engines or interested in racing. By using this formula, the user can determine the correct spring rate for their engine, which can result in improved performance and longevity.