Track times - not impressed(long post)

ok went to the track after I finally got my car out of winter storage and the new mods listed below.
We got to the track(london) at 12;30pm, it was fairly hot and the car was also hot (2 hr drive).
I immediately did a shake down run, shifting at 4000rpm and letting 4th gear go to the end of the 1/4 mile. results:
60' 2.4
1/8 9.8
mph 74
1/4 14.9
mpg 100.66
not bad i thought. so i let it cool for 45min and tried an almost all out run, shift light at 5500rpm. Now it was really hot out 90deg plus but thier was traction. Car was still hot:
60' 1.96
1/8 8.6
mph 84
1/4 13.3
mph 106mph
I was pissed, added 10mph to eigth mile and it did not show up on the 1/4. whats up with that. My friends on the bikes were loosing serious mph on the top end also (about 7mph) due to the air but seriously what is wrong with my car?? Set FPR at 35psi and the car felt strong on the highway going to the track.
more tuning i guess.

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306ci, TFS stage 3 heads. port/pol edlebrock performer intake.
77mm mass air, 70mm TB, crane 2030 cam, Mac full length headers, flowmasters
3.73 gears (just added, pulleys, ram-air, AFPR, full port/polish on upper intake....looking for new times)
Best to date: 13.4@107.85mph