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Porsche 911 991 → Technology explained – Porsche 911 Turbo, but what is the overboost function – and does it work?
We know it’s exclusive to the 911 Turbo, but what is the overboost function – and does it work? Extra performance is something we all may crave occasionally for our 911. Since 2004, Neunelfer Turbos have had this exact capability in the overboost feature. But what is it? To understand overboost, we need to consider the engine, because overboost is only possible on a turbocharged motor. The turbocharger supplies additional clean air, under pressure, into the engine to generate more power.
The 964 was the last old-school Turbo, but today it’s much-prized by collectors. Here’s your in-depth look at both the 3.3- and 3.6-litre models. Written by Kieron Fennelly 3.3 VS 3.6: HOW TO BUY A PORSCHE 964 TURBOPorsche Index: 964 Turbo - Kieron Fennelly unearths all the facts you need on both the 3.3- and 3.6-litre 964 Turbo HISTORY & TECH The 964 Turbo is famously almost the 911 Turbo that never was.
Dating from its launch in 1990, this shot of the 964 Turbo also shows its principal creators, Paul Hensler (left) and Friedrich Bezner. As 911 project manager, it was Friedrich’s idea of filling the gap left by the abandonment of the 969 with a 3.3 Turbo 964. Paul was readily supportive and oversaw the modifications to the 930 engine to ensure that it delivered a sufficient power margin over the 250ps 964 Carrera. Both career Porsche men, they arrived at the company from different backgrounds.
Epic pace, reasonable price and awesome all-weather performance make the 996 Turbo a hugely appealing machine. BUYING GUIDE: 911 TURBO 996Offering incredible performance for its price, the 996 Turbo is a sensational used buy Words DANIEL BEVIS Photos TOM GIDDEN In turbocharged form, the 996 transcended its perceived ‘bitsa’ roots (at least in the eyes of those cynics who were suspicious of the aesthetic Boxster connection) to become a truly phenomenal performance car.
The iconic yet practical supercar that would define Porsche presents a rewarding ownership opportunity for the enthusiast – if you buy the right example. Total 911 shows you what to look for… Porsche Index: 930 Turbo. Written by Kieron Fennelly. Photography by Damian Blades. Want to buy yourself a 930 Turbo?