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Honda to revert to Spec 3 power unit in Brazil

Honda is to revert to its Spec 3 power unit for this weekend’s Formula 1 Brazilian Grand Prix. Honda introduced Spec 3 during practice in Russia and ran it in Grands Prix on home territory in Japan and kept it in Toro Rosso’s STR13 in the United States. Both Pierre Gasly and Brendon Hartley were buoyed by the jump in performance provided by the latest specification, but Honda switched back to Spec 2 for Mexico. This was due to the greater understanding in how to calibrate the older-spec engine for the atypically high altitude of Mexico’s Autodromo Hermanos Rodriguez. Interlagos is another high-altitude venue, though at 800 metres above sea level is some 1,400 metres below...
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