oem 18" wheels for track use

Luigi

ops... I didn't want everyone to argue.

technically, if you use huge tires you might have more grip (max lateral acceleration), but if you place 275 tires @ front axle, the steering feedback, response, and the handling will be worst (less slalom speeds, in example).

275 tires are very enough for rear, I dont know technically how can you say more than 275 are better for a car like the 370z.

295 are for a show car, so big for a 330hp N/A RWD car with engine placed in front.

Basically on a track you get big understeer with stock setup (staggered tires, alignment specs, dampers/springs/sways), so if you want to get the car more nimble in turns just stay away from huge rear tires and get some front camber arms, and should be enough good.

I'd like to have two sets of rim, one for street and one for the track.
The 19" rays are amazing and they should be enoufh for street use, for the track I'd go with 245/45 R18 tires all-around.

A semi slick tire with proper alignment should give you Front end grip and the same should be for rear end traction.

Also, a car with narrow tires is more fun to drive.