Last weekend I went through the MSF Level 2 course taught by Hooked on Driving. It’s an amazing program, I learned a bunch, and now I can right-seat coach for a lot of HPDE organizations. That means more track time, and more aero testing!
The first thing I want to test is different wings at different tracks. For low speed, I’ll go to Pineview Run, where I have a membership and can go whenever I want. For high speed, I’ll go to Watkins Glen, which is 20 miles from me. Finally, for medium-speed tracks, there’s NYST and PittRace, which I’ll go to a couple times each.
All the wings need to use the same mounts, and I’ll make sure they are all optimized for angle. Then I’ll record min speeds through a few important corners, max speeds on straights, and of course the overall lap time. The wing contenders are the following:
- 9 Lives Racing – I have their 60″ wing. Most Miata people order 64″ (body width on NA/NB), but I was going to eventually mount mine from the end plates and so it’s a bit shorter. With welded mounts and end plates it weighs 13.8 lbs, and has an area of 546 square inches.
- APR GTC-200 – This is a 59″ wing in a 3D shape, carbon fiber, very light, just 5.2 lbs with end plates and all. I modified the wing slightly to fill it with lightweight expanding foam and I made new end plates because the old ones were seized inside. The 3D shape is wider in the middle than the sides, and has an area of about 442 sq in.
- Areyourshop – This wing is sold under numerous names on eBay, Amazon, etc. It’s a single 53″ extruded aluminum wing with adjustable brackets underneath. I reshaped the bottom and set the mounts at 41.5″. I bought mine for $60, but they’ve gone up in price since. I threw out the mounts and end plates and made my own. It weighs 5.8 lbs with end plates and a small Gurney flap, and measures 297 sq in.
- Mophon Double – Another MIC wing, this one I’ve had for a while, also sold under a variety of names. I’ve done a couple blog posts on this one already, it makes downforce, but too much drag. I’m trying to reduce drag this time and left off the top Gurney flap. I made new end plates and re-set the upper wing angle to 35 degrees. It weighs 8 lbs and has about 424 inches of total area.
All four contenders. End plates from street signs, $1 each.
There’s one final contender, but I’ll only use it at Pineview because it’s going to have so much drag it won’t be funny. Well, maybe a little funny. This is a triple wing made up of the two made in China wings.
The main wing is the single MIC wing, and the other wings mount via the end plate. First I drew out how to mount them on a scrap piece of plastic, which was a great way to get the angles.
Then I transferred these holes to aluminum (street signs) and cut out a shape that felt pleasing to the eye. I put most of the end plate area low and forward, because that’s where the low pressure zone should be. I have a digital manometer and may verify this later, but I’m not sure how much it really matters. This is mostly a conversation piece, anyway.
All assembled this wing weighed exactly the same as the 9 Lives Racing wing, 13.8 lbs, with a total wing area over 720 inches. Like I said, this will be for Pineview and autocross speeds only, I have no illusions that this would work on a big track.
What am I doing for front aero? You’ll just have to stay tuned. 2021 is going to be a fun year of aero testing!