Quote:
Originally Posted by jimepting
....I have felt for a long time, since 2008 when I first joined, that the easiest measurement would be MPG improvement over long two way courses. With such controls as low wind, constant driving techniques, constant average speed, the small variations of conditions and driving technique average out if the course is long enough. I have achieved good repeatability with this technique. True that it doesn't serve up the number we would all like to get - the improved Cd - but it does point to which mods work and relatively how well they work.
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Hi Jim,
At this point in time I would have agree with you.
A constant speed gas mileage test such as what MetroMPG or others have done, seems to be relatively simple and yet very effective to producing relative gains in aero changes and other effects.
In fact I was quite enamored by Metro's testing of his cardboard tail and later, the mirror, radiator block and other details, using the ABA technique.
I have not given up on coast down testing, but for now I will focus on other aspects of energy savings until a better approach to speed recording can be implemented.
Jim.