Alfa Romeo Alfetta GTV 2000 Turbodelta FIA Group Rally

In 1979 Autodelta introduced a limited edition 2.0-litre turbocharged model, named Turbodelta, of which 400 were made for FIA Group 4 homologation. This version used a KKK turbo which pushed power up to 175 PS (129 kW). The car also received a modified suspension layout. This was the first Italian petrol production car with a turbocharger. (Wikipedia)

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The Turbocharger is Beautifully Engineered

Witchcraft, according to Jeremy Clarkson

Turbochargers are a type of forced induction system. They compress the air flowing into the engine. The advantage of compressing the air is that it lets the engine squeeze more air into a cylinder, and more air means that more fuel can be added. Therefore, you get more power from each explosion in each cylinder. A turbocharged engine produces more power overall than the same engine without the charging. This can significantly improve the power-to-weight ratio for the engine.

In order to achieve this boost, the turbocharger uses the exhaust flow from the engine to spin a turbine, which in turn spins an air pump. The turbine in the turbocharger spins at speeds of up to 150,000 rotations per minute (rpm) – that’s about 30 times faster than most car engines can go. And since it is hooked up to the exhaust, the temperatures in the turbine are also very high.

Further reading:




Borg Warner EFR-Series Turbocharger

Forged billet CNC machined compressor wheels, “Gamma-Ti” turbine wheels that are half the weight of Inconel, ceramic ball-bearings, invesment cast housings, internal BOV, provisions for turbo speed sensor and electronic boost control solenoid.

Turbo of choice for many WTAC teams.