Endurance time of day speed?

Ghiaman1334

100RPM
Premium
Jun 29, 2019
163
22
21
Hi there,
So I'm arranging my own offline endurance and GT leagues. For these leagues I want to include endurance races. 6, 12, 24 hour stuff. Obviously, though, I don't want to actually sit with my laptop for 24 hours driving.
My question, then, is how high do I set the time multiplier if I only want to be racing for, say, half an hour to a full hour of real time? What does everyone else do? Also can races be set to not be lap-based but time-based?
 

Jempy

1000RPM
Premium
Nov 26, 2010
1,652
475
68
Using Shader Lights Patch and creating your server with Content Manager, I suppose ?