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Old Sep 21, 2002 | 09:38 AM
  #1  
91 z28 350's Avatar
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Car: 91 Z28
Engine: 350 TPI
Transmission: 700R4
1/4 times

ok i went to the e-town for the first time a couple weeks ago and here are my results how do u get the corrected times the temp was 75 and relative humidity was about 64

1st run
r/t... 1.218
60'... 2.130
330... 6.063
1/8... 9.359
mph... 72.40
1000... 12.182
1/4... 14.539
mph... 94.77

2nd run
r/t... .944
60'... 2.051
330... 5.913
1/8... 9.173
mph...75.99
1000... 11.969
1/4... 14.322
mph... 92.78

3rd run
r/t... .772
60'...2.090
330...5.987
1/8...9.271
mph... 72.53
1000... 12.90
1/4...14.445
mph... 94.86

With more practice how much room for improvement do i have ?
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Old Sep 21, 2002 | 11:37 AM
  #2  
Mustang5L5's Avatar
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From: Revere, MA
I though corrected time were for altitude only? or are there seperate times for temp and humidity?
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Old Sep 21, 2002 | 02:16 PM
  #3  
91 z28 350's Avatar
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Car: 91 Z28
Engine: 350 TPI
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o i didn't know that
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Old Sep 21, 2002 | 06:23 PM
  #4  
90Iroc-Zee's Avatar
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From: Illinois, Chicago
nice runs, ur 60s are nice, get some nittos and u should be able to hit about 14.0 stock
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Old Sep 21, 2002 | 06:30 PM
  #5  
Matt86t/a's Avatar
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From: Hillsborough, NJ and SJU in Philly
nice runs. That's good for stock, unless you aren't. The only way to improve on those times is the launch. Looks like you launched well with those '60s, i'm guessing u didn't spin. Good job. Oh, and corrected times are only for altitude. Did you hear about the 3rd gen meeting at Dukes Island park next saturday? If you want in check the NE board for info and directions.

~Matt
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Old Sep 21, 2002 | 07:43 PM
  #6  
shrp1's Avatar
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From: Wichita Kansas
F corrections..just state what you run, forget about all that other crap.
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Old Sep 21, 2002 | 10:16 PM
  #7  
Low C1500's Avatar
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From: Red Deer, Canada
Car: 89 Shortbox
Engine: 350 Vortec
Transmission: 700r4
go to www.nhra.com for alt corrections
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Old Sep 21, 2002 | 11:51 PM
  #8  
AlkyIROC's Avatar
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
I believe in corrected times for density altitude so temperature, barometric pressure and humidity are all needed.

Humidity does affect the final results but not as much as the other 2. What was the barometric pressure. That will determine a corrected time more than anything else.

Last week we had low BP and high temperature. Although it looked like a nice day for racing, the density altitude peaked at 6000 feet. Everyone was off at least 1/4 of a second from what they normally run.

e-town is at 60' elevation so there is no "altitude" correction.

Last edited by AlkyIROC; Sep 21, 2002 at 11:53 PM.
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Old Sep 23, 2002 | 05:02 PM
  #9  
12sMustang's Avatar
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From: Crestview, FL
is there anywhere to find the corrections for pressure and altitude?

Thanks

Chris
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Old Sep 25, 2002 | 12:38 PM
  #10  
Mike91rs's Avatar
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From: Indiana
Better Times

here's my times from last night...


1st run

R/T ... 1.364
60' ... 2.334
330 ... 6.679
1/8 ... 10.286
MPH ... 65.26
1000 ... 13.432
1/4 ... 16.069
MPH ... 84.69

2nd run

R/T ... 1.261
60' ... 2.428
330 ... 6.723
1/8 ... 10.301
MPH ... 69.88
1000 ... 13.413
1/4 ... 16.052
MPH ... 84.07

3rd run

R/T ... .803
60' ... 2.311
300 ... 6.7111
1/8 ... 10.372
MPH ...66.49
1000 ... 13.546
1/4 ... 16.206
MPH ... 84.26

I don't understand how my best R/T could have gone with my slowest run. I'm stock in my engine and plan on being that way for a while. Is there anything I can do to get down into the 15's??? Thanks
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Old Sep 25, 2002 | 08:22 PM
  #11  
AlkyIROC's Avatar
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Reaction time doesn't affect the ET. You could sit at the starting line for 5 minutes when the green light comes on. The timer doesn't start until you break the starting beam.

You did something wrong in the first 1/8 mile. If you look at the difference in time from the 60' mark to the 1/8 mile you'll see the run is slower. Chances are you didn't shift at the same RPM since all the shifting should be done in the first 1/8 mile.
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Old Sep 25, 2002 | 10:42 PM
  #12  
The Hog's Avatar
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From: Spokane, WA
stephen is right

Stephen is right. RT has no effect on Et. Yakima eh stephen? You are not too far from me.
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Old Sep 26, 2002 | 12:59 AM
  #13  
Krazzycowgirl's Avatar
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Posts: 2,134
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From: Washington state
Car: 87 Irocz, 95 Z28, 71 Z28 /RS
Engine: 355 Tpi, LT1, 355
Transmission: Auto, Auto, 4sp
Re: stephen is right

Originally posted by The Hog
Stephen is right. RT has no effect on Et. Yakima eh stephen? You are not too far from me.
Stephen I you need to come over to the Western side of the state & Race with The Car clubs Next year at Pacific raceways (formally known as Seattle International raceways) lol
I am 5.5 hrs from Spokane lol
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