There may be no one who has tried that size, everything i can find is people running 305/30 due to tire selection and use RE11 ( which is not a drag radial )
What are you hoping to do with your car? Running 305 in the back and OEM size in the front will induce more understeer
Also you may want to ask that question here:
370z MEATY TIRE THREAD
A lot of guys are running wide tires on stock Rays Sports in that thread
