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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I couldn't agree more. I just wanted to make clear, that we need to understand the context of the results, and that there may be factors at play, that we'd be hard pressed to actually quantify. It was tough enough with a dedicated engine lab and dyno!