Rocco, post #76, hate to break it to you pal but LCA & LSA are the same. So is LDA. Different nomenclature for the same thing.
All three refer to the angular measurement between the exh lobe & int lobe at max lobe lift.
LSA and LCA are not the same..
Tell me.. how are you going to change the LSA (Lobe Separation Angle) between an intake and an exhaust lobe on an single cam engine? They are fixed, so you can't.
LCA (Lobe Center Angle) is the angle in degrees that the cam is aligned with the crankshaft, obviously this can be changed, as in when degreeing in the cam on the intake center line or center of the nose of the lobe.
Or am I just a Dope?
It's people like you who take a simple basic concept and make a total mess out of it, for no reason at all..