Valve spring limitations vs Cam selection

ICA (seat timing)is unfortunatly givenat different heights
.050 s worthless unless you know the "intensity"
Mopar and Engle use .008 and Isky is higher but varies by cam series
Comp and many others are .006
Crane, cam dynamics, Summit, Elgin, Sealed Power use .004 which is an SAE standard
Crower may be .005- I forget
so comparing takes a cam doc or lots of experience
Another thing is that factory cams are really long below the advertised timing
The DC cams are not as long
for example I posted Mike Jones Mopar Hyd [email protected] cam at different heights in the 318 cam stickie
Turns out it is shorter at actual seat timing than any other cam in the 250 class but it is 50% larger than the DC/MP 260 @ .275, cant measure at .300 as the DC cam does not lift that high or neither i open very long at that lift That's the power spec
The seat timing gives you your low end
keep us posted when you actually measure your compression but as of 9:1 think around 54 ABDC @.006 later you loose more low end (a choice)