Well it was not exactly a blowout at speed, but the tire delaminated, melted, flew apart, whatever and was flat at the end of the run. Here is a pic of it.
I thought I was OK to use an actual drag racing tire since they are made for these speeds and racers do burnouts with them. Wrong. What I failed to realize was that drag racing tires are in use for only a few seconds, while LSR tire must withstand heat and speed for a few minutes.
Don