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Old 11-21-2013, 02:26 PM   #1 (permalink)
Lots of Questions
 
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Weather Recording

Well, with Winter upon us, it seems that it will be more difficult to fully understand what any one mod is doing from tank to tank. I found this weather website which gives you historical information and you can change the dates for whatever your tank was.

Weather Underground History

Put your zip code, a date and then after submitting, click custom to put whatever dates you want. You can get max, min and mean temperatures and a whole bunch of other information.

Obviously, it won't be a direct correlation to mpg results, but it can help to show why mpg might be lower (or higher) than a previous tank.

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Old 11-21-2013, 03:37 PM   #2 (permalink)
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Or just buy a Kestrel meter and keep track of it yourself.

I record DA(density altitude) and RAD(relative air density) for each tank.
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Old 11-21-2013, 03:48 PM   #3 (permalink)
Lots of Questions
 
Join Date: Jan 2013
Location: San Jose
Posts: 636

Motor-Rolla - '01 Toyota Corolla LE
Team Toyota
90 day: 28.3 mpg (US)

Gaia - '99 Toyota 4Runner SR5 Highlander
90 day: 19.78 mpg (US)
Thanks: 330
Thanked 82 Times in 62 Posts
I have to admit, I hadn't heard of one of those before, but after seeing a pic, I have seen them before.

When I get around to putting an Arduino in my car, I want to put a sort of weather station. I'll have to look into something like this that'll work.

I really like the idea of measuring density, better than just warmer/colder air.
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Old 11-22-2013, 10:10 AM   #4 (permalink)
Master EcoModder
 
Join Date: Nov 2010
Location: Atlanta
Posts: 403

Sweetie - '11 Hyundai Sonata GLS
90 day: 39.35 mpg (US)

My Miles - '03 Combo GLS/KLX/Ninja
90 day: 40.49 mpg (US)

Sipper' - '04 Kawasaki Ninja 250
90 day: 74.98 mpg (US)
Thanks: 1
Thanked 37 Times in 28 Posts
Spreads I've seen so far-
DA- -1500ft to +4700ft
RAD- 89%-104.5%
Air Density- .069 - .08 lbs/ft3

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