Had a brief online race first time in rF2 with this mod today in matsusaka. Pretty cool. Alvaro was there, who is creator of the physics, so it was nice.
I pretty much only drive C11, because I just couldn't ever force myself to pick other car.
I expressed my dislike about steering and grip.
I think something is strange about steering, it doesn't give any confidence for turn in. Less caster feels absolutely bad, more caster feels better, but you have to reduce FFB mult for it. Matsusaka is modeled very smooth, doesn't have bumps. In bumpy track ffb/steering is too rough. Steering doesn't have a feeling of progress, except in highspeed banked curves. I bet something is wrong with geometry. The fact that mod uses different sets of "FFB" makes no sense to me, first of all because you can't use upgrades online, or at least I don't know how, second - why not just make one good.
Tire grip is interesting subject. On the one hand, cars does superb laptimes at matsusaka, and I suppose too quick because I don't expect to be as fast as pro drivers of 1991 season, and not even putting effort in that. On the other hand at least C11 feels like it has insane lack of grip on front end. I had zero worries about oversteer, or putting power down even with full boost anywhere on the track. I have not tried my best to shift grip balance from rear to front yet, still extreme options to use - remove all of rear downforce, stiffen up rear end as much as possible, and soften front as much as possible, or in other words completely ruin the car trying to remove understeer.
The understeer is crazy at "anti-banked curve" as the name suggest it should have negative banking, so it makes sense to have worse grip there, but not that much worse. Such huge sensitivity for camber of the road shows that grip might be managed all about basic friction which is too low. I would guess that grip is very much about basic long/lat coeficient, and guess that the load sensitivity is way way way too forgiving, because of that basic lat/long grip is very low, otherwise car would be much too fast. And it already seems like it is too fast, but also Matsusaka could be too fast, or at least faster than in 1991. There are also other factors which could make the car faster than it should be. More load sensitivity and less sliding friction would have massive difference. Load sensitivity would require better throttle modulation at exits, and more effort in braking at lower speed when downforce is not too effective...
Probably weird front grip amplifies weird steering feel.