The team at Heffner Performance have finally completed their initial Stage 1 twin-turbo package for the Audi R8. Running on pump gas and using just 6 psi of boost, the two turbochargers boost output from the 4.2-liter V8 engine from 353 rwhp to 536 rwhp, a gain of over 50 percent. A more powerful 100 octane version is also being worked on which is expected to produce in excess of 600-hp. In addition, Heffner also plans twin-turbo applications for the V10-powered R8.
The Heffner car is actually not the first turbocharged Audi R8. The first such car was built by German Audi tuner MTM for a private client in the Middle East. It was a matte-black car that reportedly made 888-hp and debuted at the Dubai Auto Show several years ago.
Heffner Performance is well-known in elite tuning circles for twin-turbo applications for the Dodge Viper, Lamborghini Gallardo and Ford GT.
See after the jump for a dyno graph:
![Heffner Twin Turbo Audi R8 Laps Miller Motorsports Park [video]](http://www.autoguide.com/auto-news/wp-content/uploads/2010/07/audi_r8.jpg)
![SEMA 2010: ABT Audi R8 GT-R Boasts 620-HP and a Matte-White Carbon Body [Video]](http://www.autoguide.com/auto-news/wp-content/uploads//2010/11/IMG_5094.jpg)
![Meredes CLS Shooting Brake: Lookin’ Fine in Winter Time [Spy Photos]](http://www.autoguide.com/auto-news/wp-content/uploads//2012/02/Mercedes-CLS-Shooting-Brake-thumb.jpg "Meredes CLS Shooting Brake: Lookin’ Fine in Winter Time [Spy Photos]")
We’re outa gas, Where do the batteries go?
December 18th, 2009 at 9:39 pm