Porsche 981 wind buffet diffuser

thingiverse

Porsche owners who drive their 718, 981, or 991 models at highway speeds often experience intense wind buffeting when the windows are down. Frustrated by this issue, I decided to take matters into my own hands and design a solution. After testing it on my personal 2014 981 model, I am pleased to share that the 981_buffet.stl part can be printed with minimal infill and cut apart to form two separate parts. This approach is necessary because the finished product is quite flimsy when printed separately. Although I used this part as a test fitment, it was effective in reducing wind buffeting at speeds of up to 85mph. For those who prefer a more durable or aesthetically pleasing option, I have included the 981_buffet_mold.stl file. This design can be printed and polished to create a mold for carbon fiber or fiberglass vacuum bag fabrication. It is highly recommended to print this part in ABS plastic as epoxy tends to stick aggressively to PLA. To avoid any issues with adhesion, use a mold release agent when printing the 981_buffet_mold.stl file. When using the 981_buffet_mold.stl design, start by printing it at a low quality and high layer height for the lower half of the part. This will save time and minimize the amount of smoothing work required later on. Once you reach the surface area where the actual part will be fabricated, switch to a smaller layer height (0.15 or less) to achieve a smoother finish.