Atmospheric pressure, humidity, calculator

Discussion in 'The Bench' started by matt68gs400, Jul 24, 2017.

  1. matt68gs400

    matt68gs400 Well-Known Member

    Say, does anyone have the link to a calculator that compares ETs on different days? Also, how to get historical records of atmospheric conditions?

    Thanks!
     
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    You can research any track in the U.S. and some in Canada and Mexico. Then input the date and it will give you atmospheric conditions by the hour. That calculates Density Altitude. You can correct your timeslips with it.
     
    Last edited: Jul 24, 2017
  4. 300sbb_overkill

    300sbb_overkill WWG1WGA. MAGA

    Great stuff Larry!

    See I told you Matt, that the Wizard could hook you up!


    Derek
     
    matt68gs400 likes this.
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I used that program to correct my Cecil timeslips for 4 years.


    Cecil County TimeslipsS.JPG
     
    matt68gs400 likes this.
  6. jay3000

    jay3000 RIP 1-16-21

  7. matt68gs400

    matt68gs400 Well-Known Member

    Sweeeeeet!!!! Thanks Larry. Now to compare this years to last years best times. :)
     
  8. matt68gs400

    matt68gs400 Well-Known Member

    Ok, figured it out!
    Found the density altitude calculator (DA) and entered the weather info and it spits out DA. Then enter DA, time and trap speed. It gives me a corrected time and speed.

    According to this app, I shaved off 0.23 seconds from last year.
     

    Attached Files:

  9. matt68gs400

    matt68gs400 Well-Known Member

    IMG_8587.JPG So roughly a 1/4 second. Gas tank was about the same level. Almost a year apart on times and the car may be running slightly differently. I don't think it's out of the question to say I could have picked up 0.3 seconds with the converter. I think that's pretty good for a low HP motor with a crappy cam.
     

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