how can i get Better Times at the track
 

I have a 97 black cobra with the mods below, im 18 and i got the car in september, my first time at the track and i ran a 14.3 at 98.6....i know my car can run faster than that....if possible could you let me in on some hints for getting a better time...thanks

You're going to have to show us your time slip because there's some very important numbers in there such as 60' time. Plus, we need to know what the weather was like and if you are at or above sea level.
Just from your time there considering your mods, I would say that you are down on MPH. Depending on weather, I would expect your car to trap at 101-104mph considering it should be around 315+HP. Get Us that timeslip and we can help you out.

time slip
 

it was a 14.36 at 98.28 witha 60 foot time of 2.355 1/8 - 9.319 at 76.68 1000-12.065

it was 49 degrees humidity of 79

You're 60 foot time killed you. How far down the track were you spinning? What did you launch at? Change the pressure in your back tires at all?

If you can get the 60' down, it will help you times a lot. The humidity seemes pretty high, don't know how bad that hurt, but it did.

What's the altitiude of the tracK?

i didnt spin them at all....i didnt know how to launch so i was just sliding off the clutch (like a normal street start, then flooring it...im not sure the altitude....but it was not high....englishtown raceway in NJ.... im not sure how i can launch....i took a litttle air out of my tires..

E-town is one of the fastest tracks in the country, so the track is not a problem.
Your 60ft time definately shows that you have a 13 sec ride with some traction, but its not that horrible. You just have to practice a bit and you should be able to get that down to 2.1 and that alone should put your car in the 13.9 range. I like right around 27-28psi in the rear tires, and about 38 in the front. There is no point in going with any lower pressure in the rear with street tires.
The humidity could have hurt your car's power, but the temp was very cool, so i don't know why your MPH is still low. Have you performed a tune-up? It may need a set of fresh wires and plugs. These mod motors seem to need fresh plugs and wires about every 20-25K miles. What are your shift points?
The best advice to give you is to just practice. Practice your launch and get that 60ft time down. Also try to find your best shift points. Go back on a cool day with low humidity and see if your mph picks up. If it doesn't go at least 101mph, then I would start to look into reasons why your car isn't producing as much HP as it should be.
Just for comparison, my brother's auto '99 GT (260hp) with a chip, MAF, and X-pipe goes 14.1's@98.5 spinning hard in first gear. His car should be putting down about 40-50rwhp less then your car. That's why I say your MPH is very low for your power.