Lift Duration Calculator

Analyze valve lift and lift-to-duration ratio

Cam Specifications

Lobe Lift (inches)

Rocker Ratio

Duration @ 0.050" (degrees)

Lobe Separation Angle (degrees)

Gross Valve Lift

0.488"

12.38 mm

Lift Analysis

Lobe Lift0.325"

x Rocker Ratio1.5:1

= Gross Valve Lift0.488"

Net Lift (with 0.025" lash)0.463"

Lift/Duration Analysis

Lift/Duration Ratio2.18

Street performance - Good balance of power and drivability

Est. Peak Power RPM4720 RPM