Porsche 911 Turbo

Porsche’s latest turbo 911 model surpasses all expectations set upon it significantly. It’s the first non diesel with turbo ever to incorporate Variable Turbine Geometry. It is also the first to feature actively controlled all wheel drive and the first to reach 60 MPH in less than 4 seconds. All together it’s the most rewarding 911 Turbo ever built.

The turbocharger has gone through continuous evolution in the hands of Porsche engineers. Variations in Turbine size, and the addition of the intercooler, the move to twin turbos and advances in engine management systems have all wrung greater performance from the basic concept of an exhaust driven compressor.

Small turbos have an advantage at low rpm’s because they can get up to speed faster, though at higher RPM’s there is backpressure which robs the engine of power. However large turbines, while working well at high speeds, don’t get enough speed in lower rpm’s to spin fast enough to provide power, this is called turbo lag. The solution to this problem is what is called Variable Turbine Geometry, the exhaust flow is channeled into the turbines by way of electronically adjustable guide vanes. By changing the angle of these vanes, the system can replicate the advantages of a small turbo at low rpm, and a larger turbo as the tachometer climbs.