Quote:
Originally Posted by redpoint5
If one is certifying their vehicle for EPA fuel economy purposes, I doubt anyone would disagree that a more rigorous method should be utilized.
Since we're shade tree mechanics, the trend is more important than the precision. Having a ballpark estimate of what a modification does is tremendously helpful.
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No apparently it's better to look at pictures and guess, rather than do on-road test and development - pressure measurement, throttle-stop testing... even lift/downforce testing.
I think a major underlying theme is that on-road testing soon shows that a significant number of ideas spread in this group are wrong - very embarrassing for some!