Unfortunately after first tests were done, the low pressure area under the car was found to be too far forward, requiring a very large rear wing to be designed resulting in a lot of drag at high speeds. This was especially noticeable on fast tracks such as Hockenheim and the Österreichring, where the Ferraris and McLarens were much faster than the 78. To compensate, Ford provided development versions of the Ford Cosworth DFV, increasing the car's speed but also sacrificing reliability. Andretti had no fewer than five engine failures in 1977, costing him the world championship to Niki Lauda, even though he had won four races and taken six pole positions to Lauda's three wins. Eventually a smaller wing was designed in time for the Italian Grand Prix (see above picture), which cut the drag factor significantly, and allowed Andretti to take a popular 'home' victory.