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clip from business week.
interested in your thoughts on this concept and if it can somehow be applicable to the z32's.
Porsche 911 Turbo, 480hp/460tq, Boost kicks in at a low 1950rpm
"Porsche engineers focused much of their attention on tuning the turbochargers, developing a variable turbine geometry, or VTG, for the first time in a gasoline engine to production standard. The way VTG works is this: The compressor fins on the main turbine open fully at high revs and close at low revs—or any point in between—effectively maintaining higher exhaust gas flow and pressure to the intake even when engine loads are lower. It results in less turbo lag, especially for such large turbochargers, because in the closed position they essentially act like smaller units...460 lb-ft of torque, available between 1950 and 5000 rpm, with an additional 45 lb-ft on reserve between 2100 and 4000 rpm in what they dub overboost. Overboost raises the turbo pressure almost 3 psi and is available for 10-second bursts."
mike
zxredline@yahoo.com
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