Well I noticed something on my car that is causing some drag that I never thought about before.
I was looking at the gap at the top of my car between the roof and hatch, and the hatch is slightly higher then my roof which means it just acting like a big scoop funneling air down under the hatch.
Since I was at work, I came up with a crude test of dribbling some water on the roof and using compressed air to blow the water along the roof. The water gets to the roof edge and goes over but just hangs there as the turbulant air is pushing it back up and then after I sprinkled some water on the hatch it moves at a decent rate down the spoiler, but not as good as it could be.
I will be trying to solve this problem by adjusting the hatch and then work on sealing that gap with something to make it a nice smooth transition
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