The Evolutions all seem to have fixed timing (fixed position pickups) so that the customer simply bolts on and goes - so far -here at 4350 ft - there are no signs of timing being too high-or low
On the ZDZ's we can set start point at higher or lower positions - but for all practical purposes - the 6-8 mm magnet to pickup advance works.
The actual curves they use is a variable from engine to engine type
on latest engines ZDZ and the Evolutions - the throttle smoothness at even extremely low rpms is smooth as silk
I have tested for reliable lowest usable speeds on std props - down to 800rpm -on the Evolution 116 the ZDZ80J and 160 J
The new FAI ignition a fellow in Czech Republic is using is also reported to be very good at killing the3000 rpm "vibe" on the singles .
I found on my tuned pipe ZDZ's , top power increases when basic setting is retarded a little -which is understandable if the pipe is really pumping hard.
on fourcycle engines - the camshaft timing affected total advance settings -
Some engines needed up to 52 degrees total advance - others about35 degrees
The extreme lead setups had a lot of overlap in cam timing
On two stroke the overlap is also variable -sort of - by changing the exhaust setup and increasing cylinder pressures
more cylinder pressure needs less advance. all within reason---
If the engine design has a longer rod to stroke ratio - the timing can also be advanced a bit more . even with increased compression