Quote:
Al Pettee said:
My thought (and the point of my quesions) was that I wondered if a turbocharged 911 could also be supercharged and tuned to utilize the supercharger for low-rpm air-fuel compression and theturbocharger for higher-rpm air-fuel compression.
Never heard of that being done, but a similar effect can be achieved with using two turbochargers in SERIAL instead of parallel. One smaller Turbo with less inertia/lag would be set for low RPM, and the other to incorporate at higher RPM's therefore boosting in a serial fashion along the rpm band starting form low revs.
The Porsche 959 and the Totoya Supra Biturbo I believe used Serial Bi-turbos, but didn't seem to catch one, I think becuase of the complexity and the costs did not compensate the advantage of just fitting Twin Turbocharges in Pararlel, like in the 996TT, which already works very well.
Still tunners have mods for the 996TT that will reduce lag even further and increase power very easily, and satisfy most drivers expectations for a forced induction engined car.
SN: the Koenigsegg uses TWO superchargers (no turbos). The SLR is also supercharged but uses one. The Bugatti Veyron uses FOUR Turbochargers
.The more purist, driver's supercars; Zonda, Enzo, and Carrea GT are all N/A.