180° DEGREE WHEEL · .050-INCH METHOD Cam Timing Calculator Enter raw opening and closing readings. Duration and lobe center update instantly. 180° WHEEL REQUIRED This calculator is accurate only when entering raw readings from a 180° degree wheel. Intake cam Exhaust cam INTAKE CAMFind intake lobe center.050″ Opening°BTDCATDC Closing°BTDCABDC LOBE CENTEREnter both readings to calculate EXHAUST CAMFind exhaust lobe center.050″ Opening°ATDCBBDC Closing°BTDCATDC LOBE CENTEREnter both readings to calculate !MEASURE BOTH EVENTS AT .050-INCH TAPPET LIFTEnter the raw crankshaft readings exactly as shown on your 180° wheel—no manual conversion is needed.