Quote:
Originally Posted by aerohead
As to extending the diffuser beyond the rest of the body,it seems that it would become immersed within the turbulent wake and cease to function as a diffuser as it is assailed by turbulence from all sides.
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Actually, I misspoke here, leading to some confusion. I'm thinking of extending the diffuser just to the rear edge of the bumper, not into the wake area. On the insight, it looks like taking it out that far would clear several areas that just don't look right. Underneath the bumper, the stock "diffusing" section rolls up rapidly in the last 8-10 inches. In addition, there is the little underbumper tricky section in the middle, where the bodywork is undercut, which I do not understand. Looks to me like the entire diffuser section would be a lot cleaner aero wise to get the back edge just at the point of the rear bumper edge. Obviously some guessing going on here.
I'm thinking I'll give it a try, take some pictures and ask for comment. I certainly like the way Joe's came out, and he claims an improvement. I'll also try to do some testing, though that is a tough task on an Insight.