Wind Tunnel Report 01, Veloster N

If you follow my website, you know I’ve been building aerodynamic parts and testing them for a few years. Much of that time I was focused on Miatas, but the development, testing, and conclusions apply generally to all road racing vehicles. I’ve recently started testing in a wind tunnel, and wrote a report which I’m selling for a modest fee.

The report is over 50 pages and contains numerous pictures and tables, racing simulations, and analysis of the results. The report is aimed at the average racer who has no patience for mathematical formulas and just wants to know what works.

All of the data is presented as coefficients of lift and drag, which is useful to aero nerds and anyone who uses a racing simulation program. But all of the data is also translated into pounds of downforce and drag, and gains or losses in horsepower.

For each aerodynamic part I also do race track simulations on an autocross course and a road course, so that you’ll know the most important thing: how much faster you’ll go. At the end of the report I put various parts together into logical “builds” that comply with the rules and classes of different racing organizations, like Grid Life, NASA, and SCCA. And I also run simulations at more race tracks.

Here’s what you get in the report:

• Aerodynamic principles as succinctly as I can put them, and only as they relate to the data in this report.
• Three splitters with identical front size and shape, but very different undersides resulting in huge gains in downforce and drag reduction. I’ve never seen anyone test splitter curvature, so this is all new.
• Canards in three different locations, with results that vary from 11 pounds of front downforce to over 85!
• Hood vents, showing the drag and lift on cars with and without aero.
• Open vs closed windows, and how that affects a car with and without aero. And how to easily reduce the negative effect of open windows by half.
• Two different spoilers compared to a bare roof without a spoiler. Drag, lift, and lap times as normal, but also MPG.
• 250 square inch wing vs spoiler, for cars that race in GLTC.
• Three different 500 square inch wings, with and without Gurney flaps. This shows the effectiveness of different airfoils, and how each changes with the addition of a wicker. The wing size is especially useful for cars that race in GLTC.
• How does a low-Reynolds high-lift aviation airfoil compare to a motorsports wing? I test a Selig S1223 vs 9 Lives, PCI, and MSHD to find out.
• End plate shape and its effect on wing vehicle performance. The results don’t correlate to CFD, and they aren’t what you’d expect.
• Diffusers work great if your car has a smooth, flat underbody, but how do they work on a regular road car? I build a diffuser designed specifically for use without a flat bottom, and give you the dimension of it, and the results.
• Base car performance, hatchback aerodynamics, drag and lift, and race simulations on different tires, and more.

Fill out the form and click then click the link to download the report. If you’ve bought me a coffee, use the password for a $5 discount.

If you close the browser tab before you click the link, you won’t get the report. In that case, contact me and I’ll send you the link.

Please don’t share the report, it’s a lot of money and effort to build and test the parts, and a lot of analysis and writing to present the information in a meaningful way. I firmly believe you won’t find a cheaper way to go faster than by using the aerodynamic tricks and tips within this report.

If you feel this information was worth the money, I’d appreciate it if you leave a comment. If you don’t feel that way, tell me why and I’ll refund your money.