Offshoreonly.com - Double Super Charger?

That cant be an efficent way to make power. On the other hand, back in the eighties, the Lancia Delta group b rally car was supercharged and turbocharged very effectively. It's official specs claimed 550 hp from a 1759cc engine, however many believed that it could produce 800 or more in qualifying trim.

"The Lancia Delta S4 is a Group B rally car that competed in the World Rally Championship in 1985 and 1986, until Group B cars were banned from competition by the FIA. The car replaced the Lancia 037 Monte Carlo. The S4 took full advantage of the loose Group B regulations and was highly advanced. It featured a mid-mounted engine and all wheel drive for superior traction and handling. The car's 1759 cc four cylinder engine combined supercharging and turbocharging to reduce turbo lag at low RPM. Officially the car produced 550 horsepower (410 kW). Unofficial figures claimed the S4 could accelerate from 0 to 100 km/h on gravel in just 2.5 seconds."

I was fortunate to see one race before they were banned, absolutely awesome http://video.google.com/videoplay?do...26943206141939