So I actually got my lazy butt off of the couch today and went out and did some coastdown testing.

Here be the results.

**Methodology: **
using Iwilltrys' instructable

"Measure the drag coefficient of your car"
I used a camera mounted on a tripod in the backseat to record the data points. I used my remote shutter control to take pictures of the speedometer every 10 seconds as indicated by my stopwatch.

Frontal area was measured using

this technique but with photoshop's histogram tool instead of GIMP.

**The Raw Data:**
Vehicle Weight (with occupant) 2300lbs/1043.26kg

Frontal Area 1.768 m^2

Test run-----V1-----V2----V3----V4-----V5----V6

0 sec---------55-----55----55----55-----55----55 mph

10 sec-------49.5---51-----51----50----49.5--50 mph

20 sec-------44-----45.5---45----44----43----43 mph

30 sec-------38-----40-----40----38----37----38 mph

40 sec-------33-----35-----35----33----32----33 mph

50 sec-------29-----30------------28----27----27 mph

60 sec-------25--------------------23----22----23 mph

70 sec------------------------------------19----19.5 mph

**The Results**
Well, here's where it gets tricky. I used the solver function in the excel spreadsheet, but it keeps giving me really strange numbers, impossible numbers. So I tried my best to eyeball the numbers to get all of the data points to line up, here's what I got.

--------Solver-------Me eyeballing it

Cd------0.062-----------0.20

Crr-----0.0218----------0.018

Perhaps someone who has done this before can lend a hand?