Should temperature effect my quarter mile time this much?

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Old Jul 5, 2003 | 11:21 PM
  #1  
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Should temperature effect my quarter mile time this much?

I couldn't believe how frakin slow the car was tonight:

Reaction .585
60ft 2.28
660ft 9.724
1/4 - 15.060
MPH 92.78

With my mods I feel like I should be faster despite the 60ft time. I hope nothing is wrong, but everything seems ok just s-l-o-w.
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Old Jul 5, 2003 | 11:33 PM
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Transmission! Headers and icebox doesnt =15.0, ur second tranny is fuckin you over man!
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Old Jul 5, 2003 | 11:33 PM
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It was right at 90 outside, about 80% humidity. This was my best of 3 runs....
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Old Jul 5, 2003 | 11:35 PM
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I figure I should be right at 14.5-14.6. Would 20 degrees cooler give me .5 of a second?
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Old Jul 6, 2003 | 12:45 AM
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maybe acutator is gone... i dunno, whats the elevation on the track...
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Old Jul 6, 2003 | 12:51 AM
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i would have hate to have seen my times if i would have ended up coming there tonight!!!! ouch
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Old Jul 6, 2003 | 01:15 AM
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This is too little information to determine a problem if there is one. But high temps and high moisture content will cause lower numbers. What you should look for is relative numbers of other cars at the track. That helps to discern if it is your car or all cars.
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Old Jul 6, 2003 | 01:41 AM
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I think 70 % less humidity would be better .your sucking more water than air, good for detnation though !
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Old Jul 6, 2003 | 05:12 AM
  #9  
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Do you have exact weather condition? if not place and date and time of the runs?
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Old Jul 6, 2003 | 10:53 AM
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Originally posted by darrinb
maybe acutator is gone... i dunno, whats the elevation on the track...
Actuator is ok. I'm not sure of the exact elevation but I was asking around and most people seemed to think it wasn't high enough to be a large factor.
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Old Jul 6, 2003 | 10:55 AM
  #11  
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Originally posted by Ahmad310
i would have hate to have seen my times if i would have ended up coming there tonight!!!! ouch
I wish you had so I could've seen if it was the conditions or the car. I'm pretty sure it was the conditions everybody seemed to be complaining they were slow, but running 15's isn't fun.
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Old Jul 6, 2003 | 10:57 AM
  #12  
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Originally posted by Nashua_Night_Hawk
Do you have exact weather condition? if not place and date and time of the runs?
Covington KY 41017 at 6pm
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Old Jul 6, 2003 | 11:34 AM
  #13  
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the elevation around cincy varys between 400 to 900 ft above sea level. I doubt that played a big part...I bet it was the Temps.

If the weather is nice I might try and make it to Edgewater on this wed. if you wanna go
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Old Jul 6, 2003 | 12:23 PM
  #14  
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From: Nashua, NH, USA
At Convington, KY, on 07/05/03:

Time: 17:51
Temp: 87.80 °F / 31.0 °C
Dew: 73.40 °F / 23.0 °C
Relative Humidity: 62%
Pressure: 29.95 in / 1014.0 hPa

6.0 miles / 9.7 kilometers 11.5 mph / 18.5 km/h N/A N/A Haze

18:51
87.80 °F / 31.0 °C
73.40 °F / 23.0 °C
62%
29.95 in / 1014.0 hPa

6.0 miles / 9.7 kilometers 8.1 mph / 13.0 km/h N/A N/A Haze

19:51
86.00 °F / 30.0 °C
73.40 °F / 23.0 °C
66%
29.95 in / 1014.0 hPa

6.0 miles / 9.7 kilometers 6.9 mph / 11.1 km/h N/A N/A Haze

20:51
84.20 °F / 29.0 °C
75.20 °F / 24.0 °C
74%
29.98 in / 1015.0 hPa

6.0 miles / 9.7 kilometers 4.6 mph / 7.4 km/h N/A N/A Haze

21:51
78.80 °F / 26.0 °C
66.20 °F / 19.0 °C
65%
30.01 in / 1016.0 hPa

6.0 miles / 9.7 kilometers 16.1 mph / 25.9 km/h N/A N/A Rain ,
Thunderstorm Light Thunderstorms and Rain

22:13
75.20 °F / 24.0 °C
68.00 °F / 20.0 °C
78%
30.01 in / 1016.0 hPa

10.0 miles / 16.1 kilometers 8.1 mph / 13.0 km/h N/A N/A Rain Light Rain

22:51
71.60 °F / 22.0 °C
69.80 °F / 21.0 °C
94%
30.01 in / 1016.0 hPa

10.0 miles / 16.1 kilometers 3.5 mph / 5.6 km/h N/A N/A Rain Light Rain

23:51
71.60 °F / 22.0 °C
69.80 °F / 21.0 °C
94%
30.01 in / 1016.0 hPa

10.0 miles / 16.1 kilometers 4.6 mph / 7.4 km/h N/A N/A Mostly Cloudy
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Old Jul 6, 2003 | 12:36 PM
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Nashua_Night_Hawk's Avatar
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From: Nashua, NH, USA
Correction facctors at 6:00 PM:

Relative HP: 98.4%
Relative Air density: 93.8%
Virtual Temp: 93.5F
Vapor Pressure: 0.822"

Correction Factor to HP: 1.016
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Old Jul 6, 2003 | 12:39 PM
  #16  
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how do you use a correction factor?
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Old Jul 6, 2003 | 01:00 PM
  #17  
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From: Nashua, NH, USA
Okay... here is your answer:

From conditions above at 6PM:

Density Altitude: 2171 ft

From the NHRA table here: http://www.tsrsoftware.com/nhra%20el...%20factors.htm

The correction factors are: ET: .9744 , Trap MPH: 1.0269

So your corrected times:
ET: 15.06 x 0.9744 = 14.674464s
Trap MPH: 92.78 x 1.0269 = 95.27 MPH
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Old Jul 6, 2003 | 01:01 PM
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I know I'ma catch flames for this, but just unplug your positive terminal on the battery for 3 hours, plug it in again and drive the shit out of it. shut her diown after a 15 minyute drive and the next day, she should be back to normal.
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Old Jul 6, 2003 | 01:07 PM
  #19  
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Now the Ultimate web page would do:

1) extract weather conditions from: www.wunderground.com The have tabular format for the weather conditions:
2) Using HP correction factor calculator from: http://wahiduddin.net/calc/calc_hp_abs.htm
3) Use the correction factor for ET and MPH from http://www.tsrsoftware.com/nhra%20el...%20factors.htm

Using your time slip numbers ..Dyno numbers if know.

Generate the table of the time, weather conditions, Air density and HP correction factors, corrected HP and Torque, corrected ET and Trap, estimated HP from each run...

Now that would be awesome!
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Old Jul 6, 2003 | 02:08 PM
  #20  
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Originally posted by Nashua_Night_Hawk
Okay... here is your answer:

From conditions above at 6PM:

Density Altitude: 2171 ft

From the NHRA table here: http://www.tsrsoftware.com/nhra%20el...%20factors.htm

The correction factors are: ET: .9744 , Trap MPH: 1.0269

So your corrected times:
ET: 15.06 x 0.9744 = 14.674464s
Trap MPH: 92.78 x 1.0269 = 95.27 MPH
That seems more in line with what i should be running. Still a bit high. I get my UR Pullies this week that should shave another .1 off I am hoping. This is on the heavy stock rims as well.
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Old Jul 6, 2003 | 03:36 PM
  #21  
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i went to englishtown nj 2 weeks ago. it was 93 degrees out humidity was 83.. my worst run of the day was 15.092 and my best was 14.977 with just aem intake but weather does play a huge factor did u keep it in d5 or did you gate shift or did u try both and what did you find better
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Old Jul 6, 2003 | 03:53 PM
  #22  
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ah... summer runs are horrible.... check here: http://www.acura-cl.com/forums/showt...highlight=drag
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Old Jul 7, 2003 | 12:43 AM
  #23  
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Originally posted by ga2000
i went to englishtown nj 2 weeks ago. it was 93 degrees out humidity was 83.. my worst run of the day was 15.092 and my best was 14.977 with just aem intake but weather does play a huge factor did u keep it in d5 or did you gate shift or did u try both and what did you find better
I tried gate shifting and SS. Gateshifting produced the fastest times
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Old Jul 7, 2003 | 12:53 AM
  #24  
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i have the same mods and ran 14.9 in 85 degree weather

so dont feel too bad

sidemarker
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Old Jul 7, 2003 | 10:37 AM
  #25  
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the experts say 30 degrees = about a .1 sec
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Old Jul 7, 2003 | 03:42 PM
  #26  
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1/4 14.4 at 95
 
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did anyone go to the track and keep it in d5 and do better than gatshifting. when i went i didnt try it
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Old Jul 7, 2003 | 10:19 PM
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I tried everything. Gate shifting is fastest because you can stay in 1st longer than SS or D5
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