In the August 2013 issue of High Performance Pontiac, you'll read the second part of "Transcendent American Supercar," "How the Trans Am was born: DeLorean's 'Z/28 Killer'"!
"Last month, I explained that Pontiac General Manager John DeLorean ordered Advanced Engineering (where I was assigned as an engineer) to work on a Firebird-based "Z/28 killer," and my colleagues and I got to work turning an early-production '67 Camaro into the Pontiac Firebird Sprint Turismo (PFST ), a hopped-up road racer complete with a 250ci OHC-6 engine, triple downdraft Weber carbs, the first Shaker hood to come out of Detroit, improved suspension, and a whole lot of attitude," writes Herb Adams.
This month's article goes into detail on the '68 PFST's, production engineering, and Gene Winfield's contribution, along with the story behind the Trans Am's rear wing.
"I needed to determine the actual downforce on the car, not just the decklid. To do this without modern force-displacement equipment, we removed the rear seat and attached a piece of welding rod to the rear axle that poked through a hole in the floor. The rod was painted a different color every 1/4 inch so that the rear observer could see what color was at the floor level. By calibrating the rod with sand bags, we could approximate the downforce or lift at a given speed," Adams explains.
To learn more about the incredible birth of the Trans Am, pick up the August 2013 issue of HPP on newsstands now! And look out for Part 3 in the September 2013 issue.