I believe I have a GT6 analysis at home somewhere. It's definitely a 'pseudo-Jaray form, with separated flow ( although it probably has good rear outward vision.
* If you're going to do a template comparison, use the 2013 version with the 'faster', more aggressive roofline.
* A look at as many cars shaped similarly and cars near Cd 0.25 will give you clues.
Carl Breer's DeSoto Airflow test mule of 1934, Cd 0.51- Cd 0.263- Cd0.244.
Panhard Dyna
Shelby Cobra Daytona Coupe
1968 Toyota 2000 GT
1970 Citroen SM
1973 Rovomobil
1975 Ferrari Cr 25
1980 Ford Probe
1980 VW 2000
1982 GM Aero X
2000 Insight-I
2010 KIA Ray concept
2011 Hyundai Sonata Hybrid
2012 Tesla Model S
2015 SCION FR-S
2016 Renault EOLAB
2009 Prius-III
2021 Porsche Taycan Turbo
You're kinda where CAR and DRIVER was in March,1974, with the Ford Pinto:
*wrap-around airdam
* grille-block
* cooling fan is NA, as you're going electric
* headlight covers
* rear spoiler
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Then Pontiac's 1983 Trans Am Firebird's:
* matching rocker panels with air deflectors ( slab-sides )
* aero wheel covers
* most 'narrow' tires that you can 'safely' operate
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As much belly pan as you can.
Rear diffuser.
I like Frank Lee's comment about simply extending the rear.
Flying-buttress C-pillar extensions along a more streamlined contour above the Bonneville-spoiler, to 'sculpt' the captured-vortex there.
Rear skirts.
Minimum front wheelhouse arch-to-tire gaps.
'Tesla-esque' side mirrors, or SCCA racing mirrors. Get them at least 80mm away from the body.
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I got the CRX to an estimated Cd 0.235 as an ICE vehicle pretty easily. I can't imagine that you couldn't best that.
