I understand this thread is like a year old, but I don’t want to start a new one.
I came back to read this thread after I was looking at pictures of a custom Walkinshaw Commodore from the 80’s. It’s featured in Julian Edgar’s book on aerodynamics and various other automotive sites. Supposedly, the body kitty reduced drag up to 25% less than the stock body.
Is this spoiler at the rear the main culprit? I think so. I noticed that the deck-lid has been raised quite a bit, and you can see a rising angle below 30 degrees starting from the rear windshield. Looks to be a very exaggerated version of what’s been described in this thread.
What do you guys think?
(P.S. I think there’s a 911 in there, but same idea.