Watching an episode of Chasing Classic Cars - so they’re restoring a 1973 BMW 3.0 CSi for a customer. Trying to chase down a damp sunroof liner, they suspected one of the drainage outlets was blocked. So BMW with their crazy German engineering, the sunroof drains out the rear of the side BMW badging on the C-pillars!
Made me wonder what sort of other obscure engineering details that most of us have missed in cars?
The rear lower suspension arms on a Carrera GT are shaped like inverted wings and actually create downforce at or close to its top speed. The arms pass through Venturi tunnels in the rear underbody tray just inboard of each rear wheel. The engine of the CGT has two ECU’s, one to control each bank of cylinders because the processing power of one ECU at the time wasn’t fast enough. The engine sits lower than the transmission and the transmission is actually mounted transversely. Porsche wanted the engine to sit as low as possible in the chassis so they developed a carbon fiber multi disk basket clutch, much like a motorcycle, that was only about 4-5 inches in diameter as a normal size clutch would have taken up too much space.
All of McLaren’s V8 engines trace their roots to an engine developed for Nissan in the 90’s for a LeMans race car. McLaren bought the rights to it and developed into what we see in their cars today.