This week. we get some superb advice from Marcus Shen, the chief engineer for SpeedSource, Mazda’s factory Prototype team. He tells how he “stumbled across” motorsports and hasn’t looked back since. As we prepare to celebrate another Fourth of July weekend and commemorate the historic beginning of our great nation,...

SpeedSource Engineering announced that sports car racing veterans Link Smith and Jeff Braun have formally joined the factory-backed team. The duo have been added to support the continuing development of the Mazda Prototype program in IMSA's TUDOR United SportsCar Championship."We have focused most of our energy over the past 24...