I made one for my friend audi coupe
Weight about 2,5kg. Downforce depends from speed and angle ~3000N at 200km/h. It's not very dificult to make it. You can use radio controled model airplane or sailplane technologies and make it without molds.
Hmm. I guess I should have thought about this sooner. That wing is aggressive! I like it though.
I have had a few ideas running through my head since I read your post the other day. I will be sure to let you guys know when something comes together.
just great to read this thread! i am about to build a racing car too.. kind of group 5 replica with ultrawide body...!its a freaking job doing that alone! keep up posting pics and infos, they are needed all over the world
I will try to add some extra photos I have laying around on my computer. Maybe I'll do it today as I feel like crap and I'm not good for much else right now. I can't wait to see your pics of that build!
I ended up doing most of the work alone too. You find little tricks to help you out along the way. You know a tool or a brace or something to take the place of another persons hands.
car looks great going off the pic in your sig 
Thanks, I am trying to get more pics of the car not sitting on a trailer or in the garage.
I'll email a guy right not that said he had some. Thanks for reminding myself Tim!