Kevyn

Well I ran at the dragstrip tonight. 1/8 mile. I have a 06 gt and all I have done is a roush extreme exhaust. My fastest time was 9.51. Does that seem right? Seems a little slow to me.

GT500Steve

What were all the times on your time slip. The important ones are 60ft and mph. Give me that info and it will tell what's going on with your car.

Kevyn

Here are my time slips

Zodiac

Your 60ft times are killing you. Get them down to 2.0 or better.

GT500Steve

Yep, your 60ft times are WAY too slow. Like Zodiac said, the goal should be 2.0 minimum. Every .10 seconds you cut from your 60ft time, it will translate into a .15 reduction in your ET at the finish line. Your MPH is about right, I have seen a little higher and I have also seen a little slower. Work on your launch techniques and shifting. Those are the biggest factors.

My 05 GT ran a 9.46 @ 76mph the first time at the track, so you are in the ball park. With a CAI and a custom tune it ran a 9.12 @ 81 mph.

Welcome to the addiction!!

Kevyn

what do you guys launch at? I try to stay at 2500 plus because I'm afraid of bogging down. My shifts are quick, but they're around 5500 rpms. Does that sound right?

GT500Steve

The key is to slip the clutch enough to keep the rpms up without getting to much wheelspin. 2500 rpms sounds about right with the stock gear. From the look of the timeslip you were probably spinning too bad.

Kevyn

Alright I'll give that a shot. As far as tire pressure goes, I've heard that pumping the fronts to 50psi and dropping the rears to 18psi, or somewhere around that. I didn't do that last night, but I might next time. Any experience with this? Also, I always learned that you should avoid the burnout box if you only have street tires. Any truth to this?

GT500Steve

Yes, STAY OUT of the water. Doesn't do anything but make you spin worse on street tires. If you had drag radials, then lowering the pressure would help,on street tires it does nothing except make you spin worse. The minimum should be 28 in the rears. Over inflating the fronts will help reduce rolling resistance and can lower ETs, but only by very little. The main thing is to get some seat time... the ETs will start dropping with no changes to the car just because you are getting more used to it.

Zodiac

Can't help you on launch techniques because I have an auto. I drive through the water and do a quick burn out up to the start line to clean the tires off a bit and burn off the water. I leave off idle. I don't do anything to my tire pressures and just mash the go pedal.