Tri-turbo for Porsche 911 Turbo

tri-turbo-for-porsche-911-turbo Porsche is set to ramp up the already potent power output, crushing in-gear performance and overall economy of the 911 Turbo through the adoption of a new tri-turbo system for its existing 3.8-litre, horizontally opposed six-cylinder engine.

The firm plans to replace the twin-turbo set-up of today’s 911 Turbo with a complex triple-turbo induction process similar to that employed by BMW M’s new six-cylinder diesel-powered M550d xDrive and X6 xDrive50d models.

Porsche’s new system is undergoing its final phase of development in the back of engineering prototypes of the new top-of-the-line 991.

As revealed in a series of recent patent applications made by the German car maker, the Porsche system uses three individual turbochargers. One smaller unit is mounted close to the engine to boost low-end response together with two larger ones similar to the Borg Warner units in use today.

As well as increasing overall power and providing a more linear delivery at the lower end of the rev range, the new induction process is also claimed to improve efficiency — something well placed Weissach sources suggest will bring about significant fuel savings.

Details remain scarce, but power for the new 911 Turbo, the coupĂ© version of which is due out early next year, looks set to climb from 495bhp to somewhere in the region of 525bhp — or the same as that of today’s 911 Turbo S. At the same time, combined average fuel economy and CO2 emissions are expected to beat the existing model’s 24.4mpg and 272g/km.

As well as appearing in the 911 Turbo, the new tri-turbo system is also earmarked for the next-generation 911 GT2 and the successor to the GT2 RS.
Greg Kable

source : Auto car