Kammala wannan jumla: A farkon shekarun 1980, kungiyoyi kamar Renault, Ferrari da Brabham suna amfani da injunan turbocharged na lita 1.5 a cikin goyon bayan injunan da aka yi amfani da su na lita 3.0 wanda aka saba da su tun daga 1966. Bayan da ya ga a cikin 1982 buƙatar injin turbo na kansu, Dennis ya shawo kan mai tallafawa Williams Techniques d'Avant Garde (TAG) don tallafawa injin turbo da aka gina ta Porsche, TAG-branded injin da aka yi da ƙayyadaddun Barnard; wanda ya kafa TAG Mansour Ojjeh daga baya zai zama mai hannun jari na McLaren. A halin yanzu, sun ci gaba da amfani da injunan Cosworth yayin da tsohon abokin hamayyarsu Lauda ya fito daga ritaya a 1982 don tuki tare da Watson a cikin ci gaban 1B na MP4 na wannan shekarar. Kowannensu ya lashe tsere biyu, Watson musamman daga matsayi na 17 a grid a Detroit, kuma a wani mataki na kakar McLaren sun kasance na biyu a gasar zakarun masu kera. A wani bangare na takaddama da FISA, sun kaurace wa San Marino Grand Prix. Kodayake ba shi da amfani sosai, Watson ya sake cin nasara a Amurka, a wannan lokacin daga 22 a kan grid a
A cikin Long Beach.