Drag radial users

What I have found on my car is, my son will pull thru the water & I stop him just as it rolls out of the water(to the edge.) With the trans in second gear, he hits the throttle, until the tires start to smoke. He then releases the roll control & throttle at the same time. DO NOT CHIRP OR DO A DRY HOP AFTER THIS! Years ago I had read in print & also talked with a Firestone rep, they don't reccomend doing dry hops. When the dry hop is performed, it thermoshocks the tires, resulting in all that heat that you just put into, is now gone. Have you ever notice there is always that racer that loves to do the dry hops, the car hooks hard on the hop, then spins on the line. This is why. We run the Mickey Thompson ET Street Radial (P255-60R15), our 60ft times are high 1.50's to low 1.60's with ET's in the 11.80 range. This is a street car/weekend racer.