[Walt Fricke]

On your fine graph, the lobe centers look to be 210 crank degrees apart. so the cams would be half or 105 degrees. Would that help in identifying the cam? If correct, that seems a bit wide for a performance cam.

My experience is all with known cams, complete with setting specs.

If you advanced the timing even more you could move the overlap to TDC. Would give more exhaust valve clearance, and less intake clearance, if those are issues. If you retarded it to S spec, would alter clearances the other way.

Again, I don't believe that where the intake and exhaust traces cross is that significant, given that it can be moved around depending on how you set the cams. It makes sense that the longer the duration of the cam (I and E), the more lift the intake will show at TDC. So the S cam is 5.2mm or so, while the CIS cams are around 1.0.

But one of the cam gurus will have to chime in, as my store of knowledge has run out on this one.