Quote:
Originally Posted by Cd
My guess is that you will get better gas mileage if you leave the spoiler at its factory installed position.
It grabs a bit of the air that is detached and gives it a clean break.
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i thought that too, but with the mileage hes getting i thought i'd look into it. my initial tests were a small improvement with the spoiler off, upon more extensive testing it was a total wash for me.
looking at the car from the side, it totally looks like the spoiler should help, looking in person, i think the outer 8-12" of the spoiler on either side are hurting, because there wouldn't be detached flow to fix, the sections extending past the deck lid to the sides have no chance of helping, its just out there stirring up air. i think theres probably a solid 1' wide area in the middle of the deck lid where it would be working exactly like you would want it to. this all adds up to a net gain of: me wasting gas testing with no helpful result
i was thinking setting it straight and level behind the car might work, but might actually get better results and be more adjustable with just a sheet of coroplast