real basic question,
looking to go FI within a few years *no money T^T*

currently running 255/40 17's in the rear..
how much power can they handle?

 

All depends on tire choice, are we talking all seasons or R compounds?? And how much torque the car is making

 

Handle?

I plan to put 600 to my 255's.


Handle? I'm not sure what you are really asking here. Honestly the car does great stock with 255's in the rear so.... that'd be about 200whp.

A Z06 puts 500 down to tires 325' in the rear and 275's up front.


Bottom line is you'll never get enough tire under you when you start making 400+whp. The physical car itself is limiting unless you go widebody and even then 600whp is gonna beat those up too.

Nature of the beast. Learn to find balance in the car.

Now the Stock rear end certainly is gonna be an issue if you put monster power down, I'd be way more worried about that then the tires.