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Hi All,
I am another Prius owner. I am not so sure the hood extensition to cover the front wiper blades will be that effective. When a leaf or other bit of fluff goes up over the hood and windshield of the Prius its on a boundary layer only 1/4 inch thick. The leaf moves along very quickly over hood, There is no discernable slow down as it goes over the gap between the hood and windshield. Its unlike any car I have driven before. A wool tuft test might be in order to confirm this.
Even so, I changed the front blades to the Bosch ICON blades, which have a smaller profile than stock, and even lower than some of the other blade spring type blades. And with the winter we are having that was a good move for other reasons. These blades are sitting below the hood line projected to the windshield.
In other cars, one can use that hood extension to help change the air direction up the much more vertical windshield, well in front of the windshield. With the Prius, that change in angle is quite small. Indeed, one needs to runs with air recirculate off / with fan much more often to pull air from that point for sufficient defrosting.
There is also very little gap between the hood and the plastic bits to slide a piece of plastic under. So, it would probably need to be mounted to the top of the hood.
The other aero mod I have done to my car is adding 10 mil flashing to the stock Prius wheel rings to make a flush hub cap. The wheels are concave, so the flush hub cap was doable. The wheel rings snap into the a groove in the wheels. So far they have held up well in the heavy snow driving.
Oh, and I am running 3/4's grill block using insulation tubing. Which is a common Prius trick.
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