Nokusvika kwepasi mu1978, motokari yacho yakava yechinyakare, kunyange mukugadzirwa kwayo kwakagadziridzwa kweWR4, uye yakashandiswa chete mune dzimwe nhangemutange. WR3 uye gare gare WR4 yakapiwa kuna Theodore Racing nokuda kwechitsva chavo Keke Rosberg, uyo akapedza imwe chete yemakwikwi ake mumotokari, pa 1978 German Grand Prix. Scheckter akawana imwezve podium muWR1 pa1978 Monaco Grand Prix
. Pakati pemwaka, magadzirirwo eWR1 akatsiviwa neWolf WR5 itsva.