Drag racers, some advice please?

Hi guys,

I've been drag racing my 2001 Police Interceptor, and today I did a little bracket racing. Can you guys take a look at my #s and maybe see why it's laying over on the bottom end?

Best full-1/4 mile pass:
2.355 60'
9.848@73.74 1/8
15.166@91.79 1/4

2nd:
2.349
9.851@73.71
15.187@91.14

Today we ran 1/8th and this is what happened (please note that normally I race it in "D" and it shifts into 3rd right before the 1/8, today I had to manually shift it and hold it in 2nd at the lights):

Best:
2.236
9.785@73.15

2nd:
2.213
9.796@73.09

The part that gets me is the 1/8-to-1/4 calculators say the 9.848 is a 15.37 and the 9.785 is a 15.27. So what gives, is it laying over on the bottom, or does it just go faster then normal up top?

It's 4000+ Lb 2001 Crown Victoria P71-VIN Police Interceptor (239HP 4.6L SOHC V8, 4-Speed Auto, 3.27 trac-loc rear) that has a 2.5" cat-back, a K&N FIPK, and a Superchips Tune, no other mods.

I'd appreciate any advice or insight.

Oh and before anyone asks, 9.796 on a 9.79 dial. Too bad I red-bulbed at a -.043.

What no other drag racers to put in thier .02 or did I nail it?

Cool, well I'll try again tomorrow!

No, it's a daily driver all the way. I simply hop in, drive 50 miles to the track at 70 with the cruise and A/C on listening to the stereo, make some passes in the high-14's without so much as even taking the spare out, then I turn around and drive 50 miles home. It averages about 22MPG while doing that as well.

your rear end gear is better suited to 1/4  mile ,that is why it is slow in the 1/8 mile,if you were only going to to run 1/8 mile a 4.56 or 4.88 gear would work better