Tag: st205

By on August 12, 2013

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As America’s favorite pastime grapples with a cheating scandal involving its biggest stars, I can’t help but imagine motorsports devotees are looking on with jaded amusement. Cheating, along with exorbitant costs and tobacco sponsorships, is part and parcel of the fabric of motorsports, no matter the geographic location or formula. But few have cheated like Toyota. Who else has been accused of, or caught red-handed, at cheating in NASCAR, CART, Formula 1, and WRC? In each instance, Toyota’s machinations were always subtle and ingenious, nothing like Smokey Yunick’s 7/8th scale Chevelle or any of the famous “bending the rules” yarns. Take for example, the car you see above.

Group A cars were required to be fitted with a specific turbo restrictor that served to limit engine output. Toyota was able to engineer a special bypass valve that could not only defeat the restrictor without creating any evidence of tampering, but was designed to conceal itself when FIA technicians dismantled the turbocharger for inspection. Max Mosley himself called it “…the most sophisticated and ingenious device either I or the FIA’s technical experts have seen for a long-time.” By bypassing the restrictor, Toyota could get as much as 25 percent more airflow into the turbocharger, allowing the GT-Four to put down as much as 350 horsepower in a field where cars were limited to 300 horsepower. According to Toyota’s own specs, my friend Rob’s GT-Four puts down about 255 horsepower, but it sure feels like there might be a bypass valve in there somewhere.

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