Buy these sketches from McLaren P1 and modern Mini designer Frank Stephenson to help a good cause

Automotive designer Frank Stephenson has created a YouTube series called “How I Designed” in which he discusses greatest hits like the first modern Mini. Now he is auctioning off sketches from the video series for charity, according to a Wednesday press release.

The online auction starts Aug. 1 and ends Aug. 14. Proceeds will go to Harrison’s Fund, which seeks to find a cure for Duchenne Muscular Dystrophy, a rare and fatal genetic disease affecting children.

Stephenson will auction off seven sketches—one for each episode of his video series. Each depicts a car he designed over his career. In addition to the first-generation BMW Mini, Stephenson designed its rival, the Fiat 500. He also designed the first-generation BMW X5 and the Ford Escort Cosworth, giving the car its famous biplane rear wing.

Frank Stephenson Ford Escort Cosworth sketch

Supercars are represented as well. Stephenson penned the Ferrari F430 and

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That Time Pontiac Turbocharged the Trans Am

The big-block muscle car had all but gone extinct by the mid-1970s, a victim of two energy crises that sent fuel prices soaring. Stricter emissions standards and newly-effective CAFE (Corporate Average Fuel Economy) standards meant that Pontiac’s 455-cubic-inch (7.5-liter) Firebird Trans Am was long dead, and 1979 would be the last year for Pontiac’s next-biggest engine, the 400-cubic-inch (6.6-liter) V-8.

And yet despite changing consumer tastes, Firebird sales climbed steadily throughout the late 1970s. With other automakers exiting the pony car space and Ford having remade the Mustang as a Pinto clone, Firebird and Camaro were the last of the muscle cars and people still wanted them. How could Pontiac give buyers the power they wanted without a big V-8?

The answer was the turbocharger, which was in common use for aircraft and big-rig engines but still a novelty in the car business. Then as now, the turbo seemed

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