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Hi All,
I am believing more than ever that the 3rd Gen Prius is backwards aerodyamically. If you put a 2nd Gen next to a 3rd Gen you will maximum height of the 2nd Gen is much further forward.
I had some magnetic sign material laying around. I cut some triangular notches in the front and back, 180 degrees out of phase, so the material pointing forward is followed by a gap pointing forwared. Aka ZIG-ZAG pattern. But, as the magenetic material needs some surface area to stay stuck, the distance between the 1 inch deep 45 degree notches front-to-back is about 3 inches. The width of this is 18 inches.
I placed it across the central portion of the roof, about 6 inches back from the windshield. The intent of this, was to try and see how this works, them move it further back until a traditional turbulator position was obtained (just behind the maximum thickness / height of the shape). I had a trip yesterday to see relatives, and it seemed to be working OK. The car would change speed in the SHM peddle positions readily, on level road, which it would not do previously. This was with a slight head wind. Normally, one would have to abandon SHM completely to get the 3rd Gen Prius to accellerate a mph or more in any time under 10 seconds. That was not the case yesterday. But, this is somewhat subjective too. And not being familiar with the route, it was hard to say if there was any change.
Welp, today I am on the commuting route. And there is one hill I have talked about where the 2nd Gen would accellerate down in warp stealth, and the 3rd gen would loose speed. Today, my 3rd Gen gained at least 1 mph down this hill. That is a reversal of at least 3 mph, from previous performance. Wind was out the broadside direction, the road was wet, and it was raining. So, hmm, so far so good!
The
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