Well with grip, then no grip issue could be summed as a tire issue. The tires in NASCAR use a tire specifically meant to handle the forces generated by running around an oval which is significantly higher than on a road coarse where the track is reletivly flat.
Not saying their are less forces involved with road racing, but the amount of load a sidewall is taking in stockcar racing is significantly higher thus requiring a stiffer sidewall which will give you a lower slip angle on a roadcoarse, which is what you are describing.
What I am saying is that if you adjust the suspension to perform under the different conditions they are the same as a GT car. I know when the road racers run with the NASCAR guys at the road course events they say that the stockcars perform on-par with their GT cars. Last I heard anyways.
Not saying their are less forces involved with road racing, but the amount of load a sidewall is taking in stockcar racing is significantly higher thus requiring a stiffer sidewall which will give you a lower slip angle on a roadcoarse, which is what you are describing.
What I am saying is that if you adjust the suspension to perform under the different conditions they are the same as a GT car. I know when the road racers run with the NASCAR guys at the road course events they say that the stockcars perform on-par with their GT cars. Last I heard anyways.