Valve Spring Pressure Calculator

Calculate valve spring pressures and verify compatibility with your camshaft.

Spring Specifications

Spring height when valve closed
At the valve, not cam lobe

Optional: Known Specs

Leave blank to calculate
Minimum safe spring height

Valve Spring Guidelines

ApplicationSeatOpen
Stock/Mild Street80-100 lbs200-250 lbs
Street Performance110-140 lbs280-340 lbs
Street/Strip140-170 lbs340-420 lbs
Race180-250 lbs450-600 lbs

*Higher pressures = more valvetrain wear but less valve float