Blueprinting... Educate the uneducated

Pishta,
Agree with your comments in post #37. However, part of the quoted section is incorrect, with some strange claims. In terms of how the rocker pivots, whether it is a stud/trunnion type or Mopar shaft type, what is different in the rocker action? Nothing! Nothing other than how the rocker is held in place & operates through it's cycle. Another way to view it : the Mopar rocker pivots on a shaft of 7/8"? diam. The stud rocker also pivots on a shaft, diam is the trunnion brg OD. The point is they are both pivoting around a centre. So moving the adj up or down with either type will have identical lift, ratio etc & the claim that the ratio does not change for the stud type is incorrect. It will change as per the diagram.