Sport 440.....said

"Lobe seperation angle is cam degrees"


From Car Tech, by Mike Petralia


"Lobe Separation Angle (LSA) is NOT the same as Lobe Centerlines (LC), although the two are directly connected.

The Lobe Separation Angle is measured as the degrees that the CRANKSHAFT rotates BETWEEN the exhaust valve’s maximum lift point (aka: Exhaust Centerline) and the intake valve’s maximum lift point (aka: Intake Centerline). Check the lead illustration in this story from COMP Cams to show this effect. The highest lift points on the lobes are referred to as the cam “Lobe Centerlines” and are usually ground somewhere between 102 and 122 CRANKSHAFT degrees. Since Lobe Centerline is referenced in relation to crankshaft degrees as well, it can be moved around, depending on where you install the cam."


Hope this puts this to bed