Turocharging is a viable method of boosting power IF the engine is designed to take it. I drive a Porsche 911 turbo daily and that engine will run forever as extensive mods were made at the factory to support the turbo stresses...the same with the turbo Saab...it was engineered to be pressurized. Once again, the poor little PVR was not. To slap a turbo on is high risk in my book. If you need to go faster than a normally aspirated DMC will take you I suggest getting a used Corvette as they are alot faster and more reliable than any turbocharged or supercharged DMC would be and they are cheap too. Fred 6894