Bam,I ran your mpg number and from the old metric it suggests Cd 0.11 and change.
Your rig is most like Walter Lay's research model of 1933:
I don't think your lack of a complete stinger affects the Cd much,as you'd be into Morelli's phantom tail with the length you have.
My suspicion is that for some reason the mods are improving the BSFC and we see a higher mpg than what we'd predict from the Btu energy balance.
There are no other variables that you've introduced into the equation.
I'm gonna steal Dark Aero and high-tail it to Ogden and get it into the tunnel before you can catch me.
