[JQmile]

This look right to you guys?

Power (watts) = 1/2 (1.2(air density))(velocity cubed(m/s))(frontal area(m/sq))(drag coefficient).

I know the car goes 80mph (35.2 m/s) and it has made 36hp at the wheels (1hp=745.7 watts) so ........

36(745.7)=26845

26845=(.5)(1.2)(35.2(cubed))(1.9)(X=Cd)

26845=49720X

26845/49720=.53!

So by this math, that means my Cd is .53!! Looks like my fuel economy is all light weight and small engine, and no aero.

Thoughts?

I have an G-Tech, so I might try a coastdown measurement later provided I can do the math LOL