Carbon, Quad-Rotor Mazda RX-7 from Australia Has All the Downforce

There’s one important lesson that time attack competitions teach us – if you want downforce to work on street car-based contraptions, you’d better be generous when sizing the aero elements. Case in point with the Mazda RX-7 in the image gallery below, which comes all the way from Australia. We’re talking about a machine built to compete in the World Time Attack Challenge, which is now entering the final stages of its develo…