360 cam / valve train help / choices

1wild&crazyguy said

solids and big hyd's need adjustable rockers.

head flow goes like this, for every 5cfm =10hp, so add it up.

Your heads with a good valve job could flow around 190 -200cfm
with a 2.02 intake valve would flow around 210'ish cfm.

Click to expand...

1wcg,
OK, so where is the line in the sand? .450-.460-.470-.480-.490-.50-.510-.520-.530-.540-.550-.560-.570-.580...................Somewhere big hyd's need adjustable rockers. Totally agree...........
Where?......................Why?

Also, what are the conditions of catastrophic valve train failure as a result of non-adjustable rockers where there should be?

I'm doing my best to understand what is happening and why.

Does the base circle of the cam in relationship to the cam journals create the need for the adj. rockers on high lift hyd cams?