Cam Duration Calculator
Calculate camshaft duration from valve events
Valve Events
Formula
Duration = Opening + 180 + ClosingDuration @ 0.050" Lift
260 degrees
Aggressive Street/Race
Duration Comparisons
Duration @ 0.050"260 degrees
Est. Duration @ 0.006"270 degrees
Est. Advertised Duration290 degrees
Lobe Centerline105.0 degrees
Expected Performance
RPM Range3500-7000 RPM
Idle QualityRough, lopey idle
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.