Thank you. That part makes a lot more sense now. I understand the CR goes down with larger cam. I originally meant to ask if this cam is too big for a street/strip car or for this build with iron, open chamber heads. Plugging 52.5 into the kb silvolite calculator I come up with: Effective dynamic CR 9.668. I must still be doing something wrong, otherwise why in the H would anyone ever buy the KB 191s with taller dome? I wish I had asked advice before purchasing (macnine shop recommended) pistons and paying to have all the machine work done. when I asked the machinist about using the 292H cam, he told me my cam was probably too big, that i needed to go home and get on kb silvolite web site and figure out CR (yes this is my first build). He told me that I was probably not making 10:1 static CR and therefore the cam would be too big.
It looks like (from browsing other posts) if I had just asked advice before beginning to spend money, the flat top kb 107s would have been, more often than not, recommended.
DYNAMIC EFFECTIVE COMPRESSION RATIO
9.668