Depends on the elevation of the track, the weather that day, and the condition of the track. I ran 15.2's at a fast track at 80 ft of elevation on a hot and humid day, then did the same thing at a crappier track at 600 feet on a perfect day (60 degF and dry). (Before everyone gets all concerned about my times, yes they are slower than I want them, but now I have an open filter so my airflow doesn't peak and level off at 4500 RPM anymore.)
The following will lower a car's ET: hot air, high elevation, poor track, bad 60' times, hot intake manifold. Like above, what are your trap speeds and 60' times? Until recently I couldn't get below 2.4 sec and once I started geting in the 2.2's, I dropped about .3 on my ETs. Trap speeds were about the same with good and bad 60'. I like to run 3 times, and then pull off and let the car cool down. Any more than that and the car is slow by a few tenths at least. I also give it about 30 minutes before I hit the track to cool off when I arrive.
Those are some nice lights. Do some bracket racing and you'll be rewarded for being able to do that.
