In Australia there's people running the Skyline GT-R in the 9 second bracket, I haven't heard of anyone doing that in a Z yet. They're actually very similar cars, especially the R32 ones. Same suspension, same tranny. Stock for stock though, the GT-R is faster, corners harder and is more stable at high speeds. Why do you think Nissan chose the GT-R to dominate the Japanese racing scene rather than the Z?