The reason that I find this problematic is that Grey One thinks in cam profiles whereas I always think in terms of valve lift. This is clearly exemplifies by Grey One's graph in #49 above. Look at the overlap. There is almost no overlap and the lift in the centre of what there is is negligible. The lift of the valves with any Mk2 in the centre of the overlap is likely to be about 180 thou with about 105 degrees of overlap!
I agree with Grey One that when designing a cam one needs lots of decimal places. Looking back through my notes I see that I worked to four or five decimal places but my criteria were that all functions right down to the jerk and jounce were smoothly varying. I will show a graph below to illustrate that, but getting the cams manufactured to four decimal places was more difficult than I expected and, in fact, was not achieved.
Looks wonderful as just numbers and graphs, the reality is much worse.
I agree with Grey One that when designing a cam one needs lots of decimal places. Looking back through my notes I see that I worked to four or five decimal places but my criteria were that all functions right down to the jerk and jounce were smoothly varying. I will show a graph below to illustrate that, but getting the cams manufactured to four decimal places was more difficult than I expected and, in fact, was not achieved.
Looks wonderful as just numbers and graphs, the reality is much worse.