I have driven the same loop from Seaford to Aldinga and back with my V6 and V8 to compare Winaldl data. The KPH are just about spot on! 80kmp section, 100kph section with 2 good hills, 3 sets of traffic lights and 2 roundabouts.
If any one in South Oz would like to do the same trip from Seaford to Aldinga in their VN with my laptop connected and record the data I would be happy to do so. I can do a cd with the raw data on it and some spread sheets a bit later on. Any takers?