Honda returned to Formula One in 1983 as an engine manufacturer, supplying engines to the Spirit team. By the end of 1983, Honda started its association with the Williams team. Honda stopped supplying engines to Spirit for 1984, but the Williams partnership continued. The Honda engines showed good performance, but were unreliable. Also, the Williams chassis – that was designed for much less power – had a hard time with the power of the turbocharged Honda engines. Keke Rosberg won the Dallas Grand Prix in 1984 to give Honda their first win since their return, but a lot of retirements left Williams-Honda sixth in the constructors' championship.