Just trying to see if there might be a post I missed somewhere that might define a way to make the AI cars easier to spin out? Looked through all the easy stuff and didn't see anything that could edit that looked like it effects this(play.json, rfm, etc). Seems they are still a bit too "glued" to the track during wrecks for my liking. Next step would be examining the HDV files within the mod...which I'm trying to stay away from. For reference, this is concerning the Nascar stockcar mod.
AIGripMult in the TBC. However, if you're talking about the ISI stockcars, the AI only have 1%-2.5% more grip than a human does, so probably a better route is to give them setups that oversteer more and/or have less rear downforce.
