I realize I will hear back from those supporting this mod when I post such things. There are far to many variables, cross winds, road condition, temperature, air density, etc...to compare properly unless in a wind tunnel.
Second best would be on a track, same car, same conditions, back to back comparison, add in the yarn and video and then get a more comprehensive idea of just what is going on.
That is why I said "can effect" as it certainly can and I am sure at least some issues come up from this and it is obvious the manf of the risers, who makes some damn nice other parts, did not test this and if they had at least would of called it spoiler riser instead of the misleading term used, wing.
Then we also run into the possibility of it being a placebo effect, there are a number of parts sold for this car that seem to be adding that more than a real benefit.
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If somebody does some real testing with positive results then I may have to change my stand on this, for now, I have spent way to much time on real aerodynamics to have a hard time believing this mod is nothing but a styling effort at best and capable of inducing several negative effects at the same time. No offense meant, just how I see things and though no expert I have considerably more experience than most on such things.
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For those that want to do this, go right ahead, my posts are meant for those that might not be well informed and thus mislead into thinking it is more than just a looks issue.
Sincerely,
Rick