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I originally paid attention to this because someone on here (couldn't remember who) brought up something along the lines of not knowing about a vehicle getting 30+ mpg at 70 mph. So I thought I would keep track, find my rough figure on the Cd chart, and look to see at 70 mph.
Anyway, knowing my vehicles info (wet/loaded weight, frontal area), general driving figures (drag from road, air density), I am trying to calculate my CD by looking at the tool for it.
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I'm not sure what the tool is, but it sounds like your question is more about it than your actual Cd. You should trust it why?
The tool asks for weight but you didn't know yours?
I got my car weighed at a metal recycler right across the street. They weighed the front and rear axles separately. FWIW
weight 1985lb
front axle 840lb
42% front 58% rear
w/ driver 2200lb
What I want next is a light-plane pitot tube. It can mount where the AM radio antenna was.