1/4 mile ET

I ran at the track last night, we had some decent weather (below 100 degrees). This was my first run since putting on 275 Nitto drag radials plus the Predator Diablo sport tune. The tires definately hooked up better but I was still having some trouble. Best 60 ft time was 2.08 seconds. My buddy who runs a 911 was pulling 1.99 60 ft times but he has the engine over the wheels. I pulled a 13.89 in the 1/4 mile at 100.73 MPH. I barely edged out my buddy which was nice. The stock GT's (4.6mods) were pulling 15 to 15.20 last night. There were some seriouisly insane notch's running last night. One almost hit the wall when it got squirely at about 1/8 mile, it was pulling low 11's.

Question: I ran the drag radials at normal street PSI. If I drop the pressure would they hook up better to improve my 60 ft times and by how much? I didn't deflate them last night because I didn't have a pump to refill for the drive home. Also I tried heating the tires up in the water and on dry pavement. Dry seemed to get me better ET's is that the norm?