Article about Porsche

Published 1 year, 9 months ago

Cars Porsche Published by J. Doe

Under Pressure

The term “turbo” was once a synonym for brute power delivery. Today, turbocharged engines set standards in terms of fuel efficiency and smoothness.

Since the early seventies, Porsche has put its trust in turbochargers as a means of increasing performance. In 1972 the technology passed its motorsport baptism of fire with flying colors on board the powerful 917/10. Then the turbocharger enters series production: With the 911 Turbo, initially 191 kW (260 hp) strong, the brand finally belongs to the elite circle of manufacturers of high-performance sports cars.

To begin with, Porsche had only planned for five hundred units of the 930 series—as it was known internally—for it was the number of units required for motorsport homologation. In 1977 the first enhancement was made to the 911 Turbo—its displacement was increased from 3.0 to 3.3 liters and its output rose to as much as 220 kW (300 hp). Apart from some smaller modifications, the 930 remained in the product range almost unchanged until 1988.

With a maximum boost pressure of 0.8 bar, it develops 191 kW (260 hp), but the thrust kicks in somewhat abruptly at 3,500 rpm. In 1977 the 221 kW (300 hp) successor appeared with a larger compressor wheel and—at that time another novelty for passenger cars—an intercooler for the compressed air.

Max. charge pressure: 0.8 bar Output: 300 hp Max. torque: 412–430 Nm Porsche demonstrated the future potential of turbo technology with the 959, which was first presented at the IAA in 1983 as the Group B study and was launched three years later as a road version. The all-wheel-drive super sports car has a complex sequential boosting system with two different-sized turbochargers. Added to this is an electronic boost control system, developed by Porsche. The four-valve engine also sports water-cooled cylinder heads.

Design type: twin-turbo (sequential) Max. boost pressure: 1.0 bar The 911 Turbo of the 964 generation, with 235 kW (320 hp), initially adopted the 3.3-liter engine of its predecessor in 1991. A 3.6-liter version followed in 1993—now with 265 kW (360 hp) but better fuel economy. Max. boost pressure: 0.8 bar Output: 320 hp Max. torque: 450 Nm

Original article

Mar 04, 2020 at 17:11