Valve Timing Calculator

Calculate valve timing events and camshaft specifications

Valve Timing Events

Enter timing in degrees at 0.050" checking clearance

Intake Opens (BTDC)

Intake Closes (ABDC)

Exhaust Opens (BBDC)

Exhaust Closes (ATDC)

Checking Clearance (inches)

240

Intake Duration

240

Exhaust Duration

Valve Overlap20 degrees

Lobe Separation Angle90.0 degrees

Intake Centerline110.0 degrees ATDC

Exhaust Centerline70.0 degrees BTDC

Cam Advance/Retard20.0 Retarded

Powerband3000-7000 RPM - Performance/Race

Idle QualitySmooth

Vacuum at Idle17-21 in/Hg