Quote:
Originally Posted by MetroMPG
I agree, but would restate slightly to say the takeaway from this is that testing modifications with likely small effects is difficult.
The larger/more effective mods have a much better chance of showing up above the normal noise of variability in a set of runs.
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Yep, but you might still miss the true value even on the big ones. That is one reason that I "copy" the results of trend lines of multiple other testers when it comes to the Insight. (The Insight itself being practically impossible to test.) We know from many tests here that removing both mirrors is worth about 3%. It is sort of a Oracle of Delphi method of seeking the truth
The low fruit on the Insight is the boattail. How do I know? Several folks have built and tested boattails and gotten 12-15% improvement on Insights and other cars. The "trend" is to the 13.5% =/- range
