It seems that everyone has a variety of wheel/tire combinations for his/her car. After some very simple mods, my runflats aren't performing as well as I would like. The tires are relatively new, yet with t/c off, will spin a good bit on WOT acceleration and will chirp on the first 2 shifts (again under WOT conditions). My first quarter mile experience was hampered by poor traction. I will be eventually adding a better differential (3.42), torque converter (SY3500), headers, and maybe a head/cam package. I'm sure 400 rwhp and runflats wouldn't work out too well. When the runflats are exhausted, I plan to upgrade both the wheels and tires. I'm looking for ideas on sizes based on experience.