Ku qor sii wadida sadarkan - F1, ka dib bilowgiisii ballanqaadka ee sanadkii hore, 1966 wuxuu ahaa sanad liita Stewart; 3-litir H16 BRMs ma ahayn kuwo la isku halleyn karo, in kasta oo Stewart uu ku guuleystay Monaco Grand Prix gaari leh matoor 2-litir ah. Dhacdadii ugu muhiimsaneyd ee sannadkaasi dhacday waxay ahayd shilkii uu ku galay tartankii Belgian Grand Prix
waxa uu ku guulaystay tartanka Spa-Francorchamps, kaas oo kiciyay ololihiisa si loo hagaajiyo nabadgelyada F1 waxa uuna sababay inuu seego tartanka French Grand Prix ee Reims.