Guys have run over 250mph on radials in the quarter. They have run 5.80s in that distance as well.
That is some pretty sketchy stuff on many levels as the tires were never designed to see those types of speeds and the reality is that the extra couple of seconds up and down in terms of acceleration and deceleration put huge strains on them.
Radial vs The World is unlike anything else in drag racing. Alex's car is about as far afield from a pro mod as you can get. That car started life as a stock Corvette. It is a real Corvette body and it still rolls on the stock Corvette wheelbase. Yes, it is filled with steel tubing but it is not at all like a pro mod either on top or bottom. The whole class is basically regulated with weight. You get to be lighter with stock wheelbase, you get to be lighter if you take the wheelie bars off, you get to be lighter if you run a small block, etc.
In that class we have ProCharger hemi engines, roots hemi engines, screw blown hemi engines, turbocharged hemi engines, turbocharged, roots, and screw blown big block Wedge engines, small block engines with turbos on them, massive nitrous engines with 4-5 kits on them, and the list goes on and on and on. It's unreal.
Brian