[JacobLeSann]

I found a blueprint of the car, and printed it out. I have poor computer skills so it’s tiny. The EBLA from the trunk’s rear edge to where it contacts the end of the roof is 17 degrees. It’s very weird to measure given the roof curvature.

So it looks like that’s another piece of the puzzle.

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From what I understand, these are the three problems with the top rear of the car:

-EBLA is a bit too steep. Should be 6 degrees lower as a rule of thumb.

-Separation bubble ahead of trunk lid, Center of rear glass. This disrupts flow and could easily be causing lift.

-Boundary layer seems thick. When using a long tuft to estimate EBLA, it likes to float 1-3” above the rear of the car. This seems to be reflected in the rain.

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As I plan to keep this car another 1-2 years, I want to build a proper fiberglass bodykit designed to lower drag. For this section of the car, I don’t want to modify anything but the trunk lid (I have an OEM spare). I want to make it aesthetically pleasing, at least to my eyes. Most importantly, I want to have functional rear glass visibility.

Given those parameters, I think I’ve done pretty much everything so far. Maybe the next step is seeing what happens if I energize the boundary layer…? Hmm..