Porsche made its first and most significant changes to the 930 for 1978 model year, enlarging the engine bore by 2 mm (0.08 in) to a total displacement of 3,299 cc (3.3 L; 201.3 cu in) and adding an air-to-air intercooler. The suspension benefitted from new anti-roll bars, firmer shocks and larger diameter rear torsion bars. While the increase in displacement increased power output and torque, it also increased the weight of the vehicle, which contributed to a substantial change in the handling and character of the car compared to the Earlier 3.0-Litre Models.
The 911 Turbo was put into production in 1975. While the original purpose of the 911 Turbo was to gain homologation for the 1976 racing season, it quickly became popular among car enthusiasts. Ernst Fuhrmann adapted the turbo-technology originally developed for the 917/30 CAN-AM car and applied it to the 3.0 litre flat-six used in the Carrera RS 3.0, thus creating what Porsche internally dubbed as the 930. Total power output from the engine was 260 bhp and 254 ft lbs of torque.
Only 50 units made. The 911 Turbo Limited Edition comes equipped with the 330 bhp power unit normally only available in the 911 Turbo with Sport Equipment. In addition, the fitment of a limited slip differential as standard ensures the the increased engine performance can be used to it’s fullest extent. This Limited Edition also adopts the rear wheel air intakes of the Sport Equipment version. Essentially an SE without a slantnose front.
Just 50 ‘C16’ cars were manufactured for the UK-market, initially equipped with an uprated engine of 330bhp (from 300) mated to a 4-speed transmission. However, at the end of 1988, the uprated 5-Speed G50 gearbox was introduced, dramatically easing the peaks in power delivery by reducing the effects of ‘turbo-lag’. The factory SE also benefited from a dual-exit exhaust system, limited-slip differential, heated front seats and a sunroof.
Slantnosed and based on that of the 935 racecars, with pop-up headlamps. The front spoiler was made deeper in order to accommodate the extra oil cooler, while intakes in the rear wings fed air to the brakes. The larger turbocharger and four-outlet exhaust gave 30bhp of extra power. Porsche began their “special order program” offering a Flachbau option (Slantnose) for the 930 in very limited production. All of this at a cost of nearly 2 times the standard 930S.