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

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Old 09-11-2014, 06:30 PM   #1
Tomshaze
 
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My track times zl1 2014 manual 6 speed stock tires

What do y'all think of my time

80 degree night

25 minute cool down


Mods are

Cat delete like I gutted the oem cats
And a jlt cold air
160 degree thermostat

On the 12.0 run the car spun a little off the line and going into 2nd it hopped a little

Wanna hear some opnions

Also I tuned the car myself

Car was tuning about 24 or 25 degrees of timing and a 11.76 afr ratio


Stock run was made after a 2 hour cool down the 12.0 was after a 25 min cool down

First pass correct
2083 ft above sea level
12.266 @ 115.899

Second pass corrected
2222 ft above sea level
11.903 @ 120.437
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Last edited by Tomshaze; 09-13-2014 at 09:41 AM.
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Old 09-11-2014, 06:33 PM   #2
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Old 09-11-2014, 06:34 PM   #3
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Old 09-11-2014, 10:29 PM   #4
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good MPH on the second one.. I would be curious of the DA between the 2 runs.. I was surprised the difference the last time I went to the track just in a couple hrs made..
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Old 09-12-2014, 12:47 AM   #5
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Thanks man and a we I wish I knew the slip doesn't say anything about the da guess my track doesn't do that??




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good MPH on the second one.. I would be curious of the DA between the 2 runs.. I was surprised the difference the last time I went to the track just in a couple hrs made..
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Old 09-12-2014, 05:28 AM   #6
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Was that on stock tire's?
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Old 09-12-2014, 09:37 AM   #7
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Thanks man and a we I wish I knew the slip doesn't say anything about the da guess my track doesn't do that??
I always figure the DA on my own. If you have a smart phone there are a couple apps that you just plug in the weather/ Altitude info and it gives you the DA
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Old 09-13-2014, 01:59 AM   #8
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Was that on stock tire's?
Yes oem tires at 17 psi before the burn out launching at 3 k feathering slightly burning out but hooking pretty well I plan to run a 11.5 time on stock tires but we will see if I am successful prolly be to much power hit I wanna try so bad
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Old 09-13-2014, 02:00 AM   #9
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Quote:
Originally Posted by JackalopeZL1 View Post
I always figure the DA on my own. If you have a smart phone there are a couple apps that you just plug in the weather/ Altitude info and it gives you the DA
Dam now I know thanks for the tip
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Old 09-13-2014, 07:55 AM   #10
white ZL1

 
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If you know the track, date, and times of the passes you can get the DA from here:
http://www.dragtimes.com/da-density-...calculator.php

Without knowing the difference in the DA between the two passes, you can't judge the effectiveness of the mods and tune.
How do you know you were at an 11.76 afr? You are using a wideband I assume?
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Old 09-13-2014, 09:38 AM   #11
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Ok thanks for te info first pass

Corrected
2083 ft above sea level
12.266 @ 115.899

Second pass corrected
2222 ft above sea level
11.903 @ 120.437
Yes I tuned it myself using hp tuners
Quote:
Originally Posted by white ZL1 View Post
If you know the track, date, and times of the passes you can get the DA from here:
http://www.dragtimes.com/da-density-...calculator.php

Without knowing the difference in the DA between the two passes, you can't judge the effectiveness of the mods and tune.
How do you know you were at an 11.76 afr? You are using a wideband I assume?
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