So, a year or so ago I helped a friend and fellow Miata owner design an airfoil(based on Liebeck Airfoil used in Trans Am/WC) and associated uprights for high HP miatas. It was mainly for use on the car below, but we thought...what the hell, we might as well sell them.
We made a few, put one on the car above and got one to Dean Thomas ("deano" on mt.net I believe) to go on his V8 miata. The word I got from Mark was that Dean dropped a couple of seconds per lap at Thunderhill over the APR airfoil he had been using.
We were using a local aerospace composites shop that would produce the airfoil for a pretty damn reasonable price. Unfortunately, after building a few of them, they decided to raise their prices to the point that it really wasn't worth building them.
So, here I was needing an airfoil for my latest project. Can't have one of our wings until we find someone that will build them for a reasonable cost. I didn't particularly want the APR knowing that I could do a little better with a traditional airfoil.
So, I start looking around and find that the NASCAR Car of Tomorrow (COT) airfoil is very similar ot the traditional Liebeck Trans Am wing. It's about 58" wide, with an 11" chord and the mounting plates are about 38" apart (which is perfect for a miata). It even has a slot for a wickerbill. It's also built by Crawford Composites to the tune of ~$3000. Luckilly, you can pick up a used one from a NASCAR team for about $600 on average.
There are two versions of this wing available. There is a version that was built (for a lesser price) to be used on show cars and not for cometition. It is my understainding that the show car version did not have a slot for the wickerbill along the trailing edge and the area where the endplates mount is not machined aluminum.
This is a guy that is using the airfoil on a GT1 camaro:
Needless to say, I decided that this was something I needed to try out. So, I bought one and it's on the way. I got mine for $550 shipped. I'll be designing custom uprights to get it mounted on the Miata. We have a water jet/laser cutting business right down the street that has done some great work for us.
I'll keep you guys posted as I get a little further along. I expect the upright to be less than $200, and even less if I have multiple sets made.
A few more pics (excuse the crap quality, not taken by me)