Motorsport History: Group 5/Super Silhouette
Group 5 was an FIA motor racing classification which was applied to four distinct categories during the years 1966 to 1982. Initially Group 5 regulations defined a Special Touring Car category and from 1970 to 1971 the classification was applied to limited production Sports Cars restricted to 5 litre engine capacity. The Group 5 Sports Car category was redefined in 1972 to exclude the minimum production requirement and limit engine capacity to 3 litres. From 1976 to 1982 Group 5 was for Special Production Cars, a liberal silhouette formula based on homologated production vehicles. There were no regulations regarding minimum production quotas, and as far as the engine was concerned, as long as it had the same block as a production car, anything was possible. This meant that, with turbochargers, engines could put out as much as 570PS - more power than was available to F1 machines at that time. The combination of these awesome engines and impressive styling attracted a large fan following.
Representing Nissan in these races were the Violet (710A10), Bluebird (910), Silvia (S110), and Skyline (R30). H. Yanagida won the trophy in 1980 driving an A10, and again in 1982, with a 910.
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