This may have been done before - I know Keith had indicated he was going to try it, but I think he gave up...?
Anyway, I can now verify that YES - this CAN be done. It is possible to convert a Nascar COT Show wing to work on a race car, and it is safe to at least 130mph and probably a lot faster, judging from my experience today.
Like all my ghetto work (see Tupperware airbox for example), it isn't pretty or perfect. But it works. I took 2.5 seconds off my PB at Sydney Motorsport Park GP circuit today and set a new class lap record by a full second, and all this on R spec semi slicks (class rules allow slicks). The wing works, and bloody well.
so... Pics are in order.
I started with this cheap and nasty COT show wing. I cut the stupid "left turn only" end plates off:
What I had was 1400mm (56") wide:
View inside the wing - it's just a CF shell but quite strong:
This pic shows the way the mounts are fibreglassed into the wing - weak... But it's a show wing after all...
Mucho 4.8mm alloy rivets added to reinforce each mount:
Time for some surfboarding. Hardwood strips for laminating a foam core:
They run the full length of the wing:
I'm sure you can buy this stuff, or something better, at Home Depot racing. For the Aussies, this came from Bunnings: