Do you have the raw data for that segment? Would like to know what mg1 and ICE RPM are doing and be able to count area under the curves.
And can you expand on "~82% - adding the vehicle overhead"? Vehicle overhead is not intuitive to me in this context.
Also FYI, a GPS isn't the "no brainer" one might hope:
http://ecomodder.com/forum/showthrea...tml#post235722
Arduino Forum - TinyGPS