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Dragstrip and Launch Techniques Discussion 1/4 mile, 1/8 mile, launch discussions.

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Old 09-26-2009, 04:17 PM   #1
SRT10KLLR

 
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Going to the track today need advice

From the reading I have done on here it seems that the best method for lowering 1/4 times is in Sport mode. I had been pressing the TC button for 10 sec until the TC and Stability were both off. Then I would heat the tires and take off in D. My best has been a 13.27 on street tires and 13.23 on DR's.

If you switch to Manual mode and don't tap shift at redline will it shift automatically or only in Sport mode?

Should I brake stall a bit?

Should I leave Stability on and only turn off TC?
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Old 09-26-2009, 04:36 PM   #2
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D = Regular drive (computer shifts the car)
M = Sport Mode (computer shifts the car)

M (Sport Mode) becomes (Manual Mode) as soon as you touch the paddle shifters. In manual mode you have to shift the car yourself.

Holding the TC button down for 7+ seconds turns off the traction control and stability track. This can be used with all the different modes.


Most guys seem to be using M (Sport Mode) with the TC turned off at the track.
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Old 09-26-2009, 04:46 PM   #3
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Quote:
Originally Posted by SGOS252382 View Post
D = Regular drive (computer shifts the car)
M = Sport Mode (computer shifts the car)

M (Sport Mode) becomes (Manual Mode) as soon as you touch the paddle shifters. In manual mode you have to shift the car yourself.

Holding the TC button down for 7+ seconds turns off the traction control and stability track. This can be used with all the different modes.


Most guys seem to be using M (Sport Mode) with the TC turned off at the track.
What if you are in Manual Mode and forget to shift. Will it shift for you or hit the rev limiter and just hold you there till you shift it yourself?

So Sport Mode with only TC off not TC and Stability is the best?

How high can we rev with the stock springs especially with the auto's AFM?
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Old 09-26-2009, 05:19 PM   #4
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Quote:
Originally Posted by SRT10KLLR View Post
What if you are in Manual Mode and forget to shift. Will it shift for you or hit the rev limiter and just hold you there till you shift it yourself?

So Sport Mode with only TC off not TC and Stability is the best?

How high can we rev with the stock springs especially with the auto's AFM?
Sport mode with TC off should run just as fast as with everything off. GM recommend leaving the Stability track on just in case to keep from getting out of control.

No (in manual mode) it will not up shift for you. You will bounce off the rev limiter and the fuel will shut off ( 6100 rpms). It will feel like you took your foot off the gas pedal when you hit the rev limiter. Playing around I've bounced off the rev limiter on the 1-2 shift a few times. That 1-2 shift comes on real fast and you have to be ready for it.
I've found its better to shift a little early on the 1-2 shift to make sure I don't hit the rev limter. And I only use the tap shifts when I'm playing around. At the track I'll let the computer do the shifting.

The other time I like to use the tap shifts is when I roll off the line (like a red light) and I want the tranmission to stay in 1st gear. Then whenever I'm ready (say 20mph or so) I'll mash the gas and take off. It works really well from a low speed roll. Then I quickly make the 1-2 shift. But you have to be paying very close attention to the speedo or tach so you don't hit the rev limiter.
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Old 09-26-2009, 07:44 PM   #5
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Thanks, I will give Sport Mode w/TC off a shot.

The DR's are on and ready to go.
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Old 09-27-2009, 02:07 PM   #6
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I went to a private track day and they had a bracket race for money. I won $2400 my first time really bracket racing. I will post slips and more info when I get back from breakfast. My best run was a 12.953 at 179.32.
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Old 09-27-2009, 02:15 PM   #7
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Quote:
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My best run was a 12.953 at 179.32.
I sure hope the 179.32 is just a typo!
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Old 09-28-2009, 02:24 PM   #8
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No typo in fact my best that night was 182.54 but it is in km/h not MPH here.

Below is my winning slip:
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Old 09-30-2009, 12:35 PM   #9
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Here is a video of that last run. Wow was it close.

http://s47.photobucket.com/albums/f1...27004554-1.flv
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Old 09-30-2009, 01:26 PM   #10
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Just a little info on TM and the auto trans in the camaros: if the torque management is anything like the C6 corvettes, in a stock (untuned) auto trans , TM will kill your time if you hook up hard. The better you hook, the more invasive the TM will be and reduce power. Best to roll into the throttle , and the best results from an auto C6 was with TC off, AH on , roll into throttle to WOT about 10 ft past the tree. The vette guys with stock cars have been fighting TM since the beginning of the C6, and a few have figured this way around it.
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Old 09-30-2009, 01:57 PM   #11
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Quote:
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Here is a video of that last run. Wow was it close.

http://s47.photobucket.com/albums/f1...27004554-1.flv
Thats great give us some pointers
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Old 10-02-2009, 12:41 PM   #12
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Thats great give us some pointers
What kind of pointers? About bracket racing or launching? Either way that is what my post was about as I was asking for help myself. So All I can say is that the TC off(not both TC ans Sty) and in M(Sports Mode) gave me the best times. Taking off in D resulted in 1-2 tenths slower. I took off from idle because I was not trying to be faster but consistent as I was bracket racing. Otherwise I would have tried launching with some brake stall.

As for advice on bracket racing it was my first time so all I can say is get a car that is consistent.
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