As the title say's, some cool info on stock dizzy:
http://homepage.mac.com/ratwell/Misc/DizzyCurves.gif
http://homepage.mac.com/ratwell/.Pictures/Maintenance3/271-Sun404.jpg
http://homepage.mac.com/ratwell/.Pictures/Maintenance3/272-DizzyTest.jpg
It's worth noting the vacuum can in a kombi has a heavier spring than a beetle one, so vacuum advance only kicks in at higher vacuum than for a
beetle dizzy.
(above is mechanical only).