An alleged patent application claims Porsche could be working on the idea of a new tri-turbo system, following BMW's efforts with the recently revealed M550d. It doesn't necessarily mean the new 911 Turbo will feature the system, however, it is possible.
As far as the claimed patent application details go, first reported by Autocar, the engine uses two turbochargers in the current conventional layout, with a third item sitting closer to the engine. It's understood the third turbo would be used to build up instant boost and response, while the other two maintain a consistent power band.
Sources close to Porsche have predicted an overall power output of around 391kW for the new Turbo, with whatever engine Porsche eventually decides to run with. That kind of power level is up 23kW on the current 997 model, and up with the Nissan GT-R's 390kW. A Turbo S model further down the track is also expected, likely bringing power levels over the 400kW mark.
Visually, the new 911 Turbo will feature a pumped out body compared with the normal 911 range, with a widened track front and rear, and bolstered rear haunches accommodating intake vents for the intercoolers. By the looks of this prototype, the trademark heat-extraction vents for the intercoolers still remain behind the rear wheels.
As far as a release date goes for the new 911 Turbo, Porsche Australia's Paul Ellis told CarAdvice it is still too far off, even to speculate. If we take a look at previous generations of the car, however, the 911 Turbo usually follows at least two years after the normal model run. This suggests a possible late 2013 unveiling for the next-gen Turbo.