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In 1974, Porsche created the Carrera RS 3.0 with mechanical fuel injection. Its price was almost twice that of the 2.7 RS, but it offered a fair amount of racing capability for the money. The chassis was largely similar to that of the 1973 Carrera RSR and the brake system was from the Porsche 917.

The 911E and 911S used mechanical fuel injection in all markets. The 911T was still using a carb, except in the US where it also used MFI, which accounts for the 9 hp power difference between the two.

The 1970 Porsche 911 was so good that the 1971 model year was basically unchanged. In 1971, the D-series replaced the C-series. The D-series featured galvanized under floor areas that were coated with PVC to make the car more resistant to corrosion.

In 1976 Porsche still made the 911 S Targa, the 911 S Coupe and the 911 E with few changes. However, Porsche headlined the mightiest 911 yet, the Turbo Carrera. They advertised it as “The Ultimate Porsche” and so it was.

In 1969 The wheelbase for all 911 and 912 models increased from 87.0 to 89.3 in, this helped the handing of the 911 when drivers would drive at the 911's limit creating more confidence between driver and car.