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Calcimator

Camshaft Duration Calculator

Cam specs from target RPM range and application.

Inputs

Results

Intake dur. @0.050" (°)

328

Exhaust dur. @0.050" (°)

336

Intake advertised (°)374
Exhaust advertised (°)382
Intake valve lift (in)0.6
Exhaust valve lift (in)0.58
Valve overlap (°)220
Est. idle vacuum (inHg)2
Intake Centerline108
Min Idle Rpm2,210
Power Band Start3,000
Power Band End6,000
How to Use This Calculator
  1. Enter Peak power RPM, Rocker arm ratio, and Lobe separation angle (°).
  2. Set Cam advance (°) and Application (0-2).
  3. Review Intake dur. @0.050 and Exhaust dur. @0.050.
  4. Use Intake advertised (°) and Exhaust advertised (°) to inform your decision.
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