Valve Spring Calculator

Calculate valve spring characteristics and RPM compatibility

Spring Specifications

Seat Pressure (lbs)

Open Pressure (lbs)

Installed Height (inches)

Maximum Valve Lift (inches)

Target Max RPM

Spring Rate

400 lbs/in

Medium rate - good for street/strip applications

Spring Analysis

Open/Seat Ratio2.69:1

Height at Max Lift1.250"

Coil Bind Clearance1.190"

RPM Compatibility

Valve Float Risk

Spring pressure adequate

Harmonic Damper

May need damper