David Brumfield is a High-Performance Driving Instructor for Porsche Club of America (PCA). Brumfield is also an Inventor who maintains various patents. Porsche Racer David Brumfield regularly participates in heated races around the track.  (In a Porsche, of course!)  Brumfield has raced Porsche vehicles for decades.  And it’s no surprise why, when even plenty of […]