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Old 06-09-2011, 05:13 PM   #1 (permalink)
joggerfogger
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Join Date: Jun 2011
Location: Portland, OR
Posts: 34

Jogger Fogger - '07 GMC Sierra SLT
90 day: 13.62 mpg (US)
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Frontal Area calculations - GMC Sierra 59.9sf?

Did I do this right? 60 square feet?

I used GIMP and a picture of my truck from the front and got 9,980,928 pixels.
The very tip of my mirror to mirror is exactly 100 inches or 8.33 feet, and GIMP says 3468 pixels.
So the ratio of ft^2 / pixels = .000006 which gives me 59.886sf.?

So my Allison 1000 Transmission manual says 6 times "Coasting in neutral can cause severe transmission damage." So I'm not really going to do any coast down tests which kind of sucks. I'll have to do everything just driving.



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