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

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Old 07-07-2013, 01:21 AM   #1
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Concerned about performance.

I could not perform for my wife today. Haha
I went out too the drag strip today for my birthday and made 2 passes on my car for the first time.

My numbers are as posted:
R/t .256
60ft 2.103
1/8 8.58
1/4 12.9 @111.5

I realize I can get my 60ft times way down and that is driver/ tire issues but even then I do not believe this car is performing the way it should.
I have a 2013 ls3 with an edelbrock supercharger,NPP exhaust and Jennety tuned.

Need some advice on the car performance.
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Old 07-07-2013, 08:58 AM   #2
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Stick?

Try different shift points.
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Old 07-07-2013, 10:48 AM   #3
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Stick?

Try different shift points.
Yea he said LS3. What are you shifting at rpm wise? What are you launching at? With those mods you should be way quicker.
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Old 07-07-2013, 10:55 AM   #4
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I could not perform for my wife today.
What does that have to do with your car?
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Old 07-07-2013, 11:35 AM   #5
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Should definitely be faster than what you're showing. Times could also be effected by weather? What were the weather conditions, track elevation? Track location?
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Old 07-07-2013, 12:13 PM   #6
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The track elevation is 400ft. And the air temperature was around 75.
I am launching around 2800 rpm. I used to drag my cobalt SS quite often so I am familiar with the track. My cobalt would trap speeds of 115 plus and spinning down the track.
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Old 07-07-2013, 12:21 PM   #7
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what kinda boost u running ?
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Old 07-07-2013, 12:42 PM   #8
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I do not have a boost gauge but based on the data log conversion I am running about 6.8.
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Old 07-07-2013, 12:44 PM   #9
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That's strange I would at least expect your trap speed to be higher. You are running what a stock 1LE would run.
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Old 07-07-2013, 12:56 PM   #10
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That is exactly what I am thinking. It is like the supercharger is not there. The trap speed should be way way higher. Even spinning in first and second. I have done several data logs in the past and finally gave up. I noticed KR quite a bit with a 92 octane tune and our gas here is 93. I did some testing by throwing octane boost in the car and data logging again. The KR went down significantly proving to me the assholes around here are not putting 93 octane In there tanks.
Some days the car feels pretty fast and some days not so much. I feel like I wasted my money on the supercharger and maybe the car. I am a little frustrated
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Old 07-07-2013, 12:56 PM   #11
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Quote:
Originally Posted by 2ssx2 View Post
I could not perform for my wife today. Haha
I went out too the drag strip today for my birthday and made 2 passes on my car for the first time.

My numbers are as posted:
R/t .256
60ft 2.103
1/8 8.58
1/4 12.9 @111.5

I realize I can get my 60ft times way down and that is driver/ tire issues but even then I do not believe this car is performing the way it should.
I have a 2013 ls3 with an edelbrock supercharger,NPP exhaust and Jennety tuned.


Need some advice on the car performance.

60ft is hurting your ET quite a bit but your mods should be pulling more mph than 111.5?? Have you data logged your runs? Tune could be off? What was the DA on that run?
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Old 07-07-2013, 01:21 PM   #12
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What was your rwhp results?
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Old 07-07-2013, 01:28 PM   #13
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60ft is hurting your ET quite a bit but your mods should be pulling more mph than 111.5?? Have you data logged your runs? Tune could be off? What was the DA on that run?
I did not data log the runs but will do that on Friday.
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Old 07-07-2013, 01:31 PM   #14
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What was your rwhp results?
Car has never been on a dyno but conservatively speaking shoul be around 490 rwhp i would think
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Old 07-07-2013, 02:10 PM   #15
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I would go get it dyno'd and go from there.
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Old 07-07-2013, 02:32 PM   #16
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if da was way up ur times could be right on. what day was it and what track and state. could make all the diff in the world
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Old 07-07-2013, 02:41 PM   #17
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if da was way up ur times could be right on. what day was it and what track and state. could make all the diff in the world

Yeah, if the DA was 6000. My bolt on car making 368 rwhp trapped 113 and ran 12.4.
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Old 07-07-2013, 02:44 PM   #18
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The track elevation is 400ft. And the air temperature was around 75.
I am launching around 2800 rpm. I used to drag my cobalt SS quite often so I am familiar with the track. My cobalt would trap speeds of 115 plus and spinning down the track.
Quote:
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if da was way up ur times could be right on. what day was it and what track and state. could make all the diff in the world


DA can't be that bad with a track eleveation of 400 and temps of 75 degrees.
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Old 07-07-2013, 03:24 PM   #19
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i didnt know if he knew or not i know some one track says 1900 elevation in his state. but most are around 500 range. but if he is only making 490 at the wheels and da up around 2500 to 3000 just guessing that could account for alot of it. just tryin to help him figure it out. i know my car weighs less thing his and making around the same power now i usally trap around 117 average. n/a
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Old 07-07-2013, 04:15 PM   #20
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I would say something off i ran 12.50 all day on a bad day back when i only had a little LS hot cam header & 3200stall
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Old 07-07-2013, 05:35 PM   #21
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I agree something is way off. I would say 12.50 should of been a starting point for only running the car 2 times. I would think this car able to run 12.0 pretty easy
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Old 07-07-2013, 05:47 PM   #22
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DA can't be that bad with a track eleveation of 400 and temps of 75 degrees.
I ran the corrected da numbers for the track yesterday and they were within 2 tenths. So basically a perfect day. Wish i could figure this out. I will take to a dyno this week and have it looked at.
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Old 07-07-2013, 07:44 PM   #23
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I ran the corrected da numbers for the track yesterday and they were within 2 tenths. So basically a perfect day. Wish i could figure this out. I will take to a dyno this week and have it looked at.
Good idea, this way you will know how much power you are putting down. Your dyno will shed some light on a possible issue.

Btw, Terry's bone stock 2013 Auto went 12.7x with no mods.
Your time is off for your mods.
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Old 07-07-2013, 09:38 PM   #24
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Not sure if he's convenient to you, but Ellis is a long time friend and knows his way around quick LS cars:

https://www.facebook.com/pages/SPEED...07427499275132
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Old 07-07-2013, 09:52 PM   #25
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Thanks for the info.
I did a fuse pull and some data logging. Still getting some knock retard around shift points and when I first get on it. 4 is the worst I seen but I would rather have none
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