Right in time for the upcoming real 24 hours race on the Nordschleife I release this little addon. I added 'some' grid spots and now you are able to drive with 108 cars on the Ring at once.
This was mainly an experiment whether AC could handle this amount of cars so don't expect perfection. The pitlane is heavily overcrowded and for proper positioning of crew members there was no space.
Funnily with my PC I had no problems with the GPU. I have a GTX 970 and normally I run max details @ 60 FPS. With 108 cars at the start of a race (!) it were still >30 FPS. My CPU, an Intel i7 6700K couldn't cope with calculating 108 car physics (AI) in realtime, so the game was going in slow-motion. With 60 AI cars I had no problems with the CPU.
For online use it should perform even better - I'm already planning a one-off VLN multiplayer race over @ virtualracing.de. Let's see if we can organize a race with >100 participants - details on that will follow at a later point.
Please be aware, that this addon will bring AC and your PC to their limits. Use it at your own risk!
As this addon is basically the same as the OSRW grid spot extensions I assume it is OK to upload it here. If someone wants to have it removed, please inform me and I will try to do so as soon as possible.