My best averages
5.2 on street tires (225/50 Falken)
5.0-5.1 on drag radials (225/50 Nitto)
I can't see the chassis handling anything quicker then that. Maybe 4.9's with the perfect launch and 2k into the axles, hubs, intermediate shaft, etc... That would be a waste of money on a FWD car IMNSHO.
5.3-5.5 is a safe "estimated" range for a perfect launch on most cars making "quality" power. (LSD, tires, etc of course)
