If budget allows go to 245-45/18 tires on 18x8 rims. The wider rubber did a lot for me to help limit wheelspin. Also check struts as noted....when you launch, the car wants to "dig", ie the rear goes down and the front goes up. One of the challenges with FWD cars....if the struts/springs are too soft, they will allow the rear suspension to compress too much and the front to come up too much....and when you unload the front you get wheelspin. Stiffer suspension limits that body travel and keeps the weight on the front tires.
