Good news, I have been giving access again this year to a private runway service road for testing. I can use pretty much anytime I need it.
So this year I will continue my testing from 40 to 45 mph. The best mpg in the Talon last year was around 55 mph.
EDIT:
Light Load Stock Settings.
2350 rpm
14.7:1 A/F
1.03 BSFC
15.14 BSAC
11.46 lbs./hr fuel
168.4 lbs./hr air
28 mpg @ 53 mph
Light Load Lean Burn Settings "private road test"
2350 rpm
30:1 A/F
0.56 BSFC
16.80 BSAC
6.26 lbs./hr fuel
188 lbs./hr air
53 mpg @ 53 mph