This thing must be a freaking BLAST!! Here are a few excerpts from the Audiworld article...
The heart and soul of this modified TT is its potent power plant. HPA Motorsports' "Infamous" Twin Turbo systems deliver the absolute ultimate in reliability, refinement, drivability, throttle response, torque and top end raw power for the 3.2L VR6 24V engine. The unrivalled output of the limited edition FT565 turbo system, some 565bhp and 500 ft.lbs of torque, is created by a combination of custom quick-spooling twin Garret/HGP R28 ball bearing turbochargers, a proprietary short runner intake manifold, dual high capacity side mount intercoolers with custom aluminum shrouding, cool blue silicone boost tubing, a hi-flow mass airflow sensor, a compression reducing head plate (8.5:1), an upgraded fuel pressure regulator, larger fuel injectors, and seamless proprietary ECU programming. The hugely increased exhaust gas volume exits through dual 70mm ceramic coated down pipes, dual metallic 100 cell catalytic converters, and a sensational 88mm stainless steel exhaust system with twin ECU controlled secondary bypass valves before the rear muffler. Things are also safely strengthened in the bottom end by installing proprietary race grade connecting rod bearings.
More than doubling the power and torque of the TT's VR6 engine required careful modification of the DSG clutch pack, DSG transmission and Haldex driveline. The clutch received HPA's proprietary high performance upgrade, and the DSG paddle shift transmission received a new software program to properly deal with the increased torque. The only other driveline modification involved the replacing of the standard OE Haldex Gen2 controller with the "Sport" Haldex Gen 2 controller which more aggressively and effectively distributes power to all four wheels. This provides additional chassis control allowing the driver's input to better dictate the vehicle dynamics under braking and corner entry.
Driving the TT sedately around town revealed the gentle manners of this extremely refined HPA project. Throttle sensitivity is nice and linear, yet responsive, making the power very easy to modulate. The highly modified power plant idled as smoothly and quietly as a factory TT 3.2, and no codes are thrown, so there are no engine lights marring the dashboard, again just as the factory version. Testing things a little reveals that a heavy stab on the throttle in any gear builds boost virtually instantaneousl y, and you're off. The DSG performs smoothly and as predictably as OE in both manual and auto mode with no fuzz or hic-up.
At the track from a standing start, the scenario goes like this. With the Launch Control holding the revs at 4800 rpm, you chuckle to yourself in anticipation, as you get ready to hang on for dear life. Quickly releasing the brake pedal has the 4 wheels screaming for grip, once they hook up you are very quickly looking for second gear with your right index finger, the modified DSG programming then allows you to snap off upshifts like an F1 driver, as you are rewarded by a rocket-like thrust squashing you into the seat well into the triple digits.
What is shocking about the experience is that the DSG transmission shifts so fast, and you never get the sensation of acceleration release as in a manually shifted vehicle. In addition, the exhaust note is downright frightening, transforming from growl to roar to tearing shriek, somewhat like a cross between a race car and jet fighter. The dual ECU-activated exhaust bypass valves open at 2500 rpm under full throttle, redirecting the exhaust flow through a combination of the muffler and the two individual bypass dumps releasing the back pressure on the exhaust system, thus increasing power in the top end. It is all totally unbelievable!
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