LA 318 advice
Overlap is the greyed out triangle in between. Moving the lobes closer together (tighten lsa) and or increase duration gonna increase that overlap triangle, rough idle.
If you say keep lsa at 108 then decreasing duration will be the only way to reduce overlap which is basically what you want small ish cam on a relatively tight lsa. Earlier intake valve closing point.
Overlap is the greyed out triangle in between. Moving the lobes closer together (tighten lsa) and or increase duration gonna increase that overlap triangle, rough idle.
If you say keep lsa at 108 then decreasing duration will be the only way to reduce overlap which is basically what you want small ish cam on a relatively tight lsa. Earlier intake valve closing point.