Valve Timing Calculator
Calculate your engine’s valve timing parameters, overlap, duration, and performance characteristics. Understand how camshaft specs affect engine performance across different RPM ranges.
Step 1: Engine Specifications
Understanding Valve Timing
Valve timing determines when the intake and exhaust valves open and close relative to piston position. Proper timing optimizes engine breathing, power output, and efficiency across the RPM range.
Step 2: Additional Options
About Lobe Separation Angle
Lobe separation angle (LSA) is the angle between the intake and exhaust lobe centerlines. Narrow LSA (104-108°) increases overlap and high-RPM power. Wide LSA (112-116°) reduces overlap and improves low-end torque and idle quality.
Valve Timing Analysis Results
Total Valve Overlap
Camshaft Profile Comparison
| Cam Profile | Intake Duration | Exhaust Duration | Overlap | Power Band |
|---|
Valve Timing Diagram
Valve Timing Calculation Formula
Duration = 180° + IVO + IVC
Valve duration is calculated by adding 180° to the intake valve opening and closing angles. Overlap is the sum of intake opening and exhaust closing angles. Actual performance depends on engine design, displacement, and induction system.
Need Professional Engine Tuning?
Connect with our automotive experts for detailed engine analysis, dyno testing, and custom camshaft selection for your specific application.
Get Professional Tuning