Valve Overlap Calculator

Calculate valve overlap and analyze its effects

Valve Events

Intake Opens Before TDC (degrees)

Exhaust Closes After TDC (degrees)

Intake Duration

Exhaust Duration

Overlap = Intake Opens BTDC + Exhaust Closes ATDC

20 degrees

Scavenging Effect: Moderate

Idle QualitySlight lope, good street manners

Expected Vacuum15-18 in/Hg

Reversion RiskLow

Power BrakesCompatible

Automatic TransCompatible

Best Application:

Mild street performance