I have run them low (23-25 psi)and high (35-38psi) at the track with little noticeable difference. I would mark them with chalk to see how much the side wall would deflect, it doesn't, even at 23 psi in an autox event. The car seems to react better at the 35 psi.
No matter what is said, these are not great tires at the drag strip. There are new pilots getting as good times at the strip. Any tire will hook up when the VHT is new and thick. If the strip is not prepped these will have the same problem as the pilots, with one exception, you will not have the wheel hop.