Quote:
Originally Posted by Phase
Is that in a 3D all 4 sides shape or just the side flares?
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1) I recommend losing the wickerbill. It's a downforce device, intended to create separation, not attachment. Especially not 're-attachment.'
2) I recommend that you not create a backwards-facing-step, ending the upper trailing edge at the taillight location. Aerodynamically, you couldn't possibly do anything worse to the car!
3) And as I've stated, since the IONIQ is already a 'fit' under the AST-III, the rear upper trailing edge ought to just follow the AST contour.
I can only guarantee 100% flow attachment.
4) The 'diffuser' should also follow the AST.
5) I don't have access to an IONIQ. I haven't a clue about the rear quarter-panel camber, or any vestigial OEM boat-tail tapering. If there is some preliminary tapering, it should take off from there, while following a 'french-curve' contour of the AST, as is present on the roof.
6) This is the most important thing you're going to be working with.