Well, I found a few newer onboards.
McLaren 650S GT3, Full Circuit:
https://www.youtube.com/watch?v=l4brkpvggUg
Around the 4.828-mile course, the time looks to be about a 3:14.
This looks like a Radical SR of some sort, on the circuit layout that V8SC will use:
https://www.speedcafe.com/2018/04/12...rcuit-onboard/
If the lap were completed, maybe that car could manage a 1:55, though that might be slightly optimistic. The length of that configuration is 3.076 miles.
I didn't really have the sense that the course exactly fit together smoothly, but I was still hoping some of those corners would be fairly quick, but they won't be, certainly not for the Supercars.
For Turns 11/12 to work for overtaking, Turns 9/10 need to be flat, or close to it, and they're not. You can say the same about T13 leading into T14.
So for V8SC, I'm not terribly confident about overtaking outside of T1 and T6. I think the run from T15 to T17 is going to be too short to set up a good run.
If they used the full course, then perhaps T9, and even T14, could be options; I think T20 would probably be too slow to have a good run from T19 to T21. Of course, this is completely ignoring the fact that a lap on the 4.828-mile layout would take easily more than 50% longer than a lap around Bathurst.
It just strikes me that if this course has a primary, express purpose for racing cars, then quite a few of the corners were designed specifically for high-downforce vehicles.