1,054 bhp Porsche 997 to attempt World Speed Record for Street-Legal Cars

December MISSION 400 PLUS is attempting to to win the Blue Ribbon for the world’s fastest street-legal sports car next year, with a top speed of more than 400 km/h. Developed through collaboration with H&R, Jürgen Alzen Motorsport and engine tuner RS Tuning and the sports car is based on the Porsche 997. With a boost pressure of 1.5 bar the engine develops 1,054 hp / 775.7 kW at 7,700 rpm and a peak torque of 1,030 Nm at 5,800 rpm, yet, the record hunter meets stringent EURO IV emission limits.

The idea to tackle the world record was born in August 2006 at the Six-Hour Race on the Nürburgring: After the H&R-sponsored Alzen Motorsport Porsche 911 GT3 fell victim to an accident in only the second lap, team boss Jürgen Alzen and H&R marketing director Hardy von der Brake had time to discuss means to better demonstrate the technology transfer from motorsports to the development of sporty suspension components.

The idea quickly turned into the MISSION 400 PLUS concept, whose prototype now celebrated its world debut at the ESSEN-MOTOR-SHOW 2006. The three companies that have joined forces to turn this concept into reality have proven their potential in building super-fast sports cars numerous times before.

The experienced team of technicians from Jürgen Alzen Motorsport in Betzdorf is responsible for the technical design and for building the car. The engine is based on that of the latest 997-series Porsche 911 Turbo, and comes from RS Tuning. H&R contributes its immense know-how in the field of suspension design and setup.

Favorable aerodynamic properties are essential for a car that is designed to break the 400-km/h barrier. Minimizing frontal surface area is absolutely elementary, which is why Jürgen Alzen decided to lower the roof by 75 millimeters. At the same time the A-pillars were tilted back further by 5.5 degrees. To give the coupe a homogenous overall appearance the tilt of B- and C-pillars was adjusted accordingly. Special flush-mounted polycarbonate windows all around complete the roof conversion.

Also part of the MISSION 400 PLUS aerodynamics concept are numerous other modifications that were developed and tested in the wind tunnel. Among them are a long rear with pronounced separation edge and the absence of rain channels. Streamlined cowlings for the 18-inch BBS light-alloy wheels will reduce air turbulence on the vehicle’s sides during the record run.

The MISSION 400 PLUS engine is built by RS Tuning in Kirchhaslach, where the racing engines for Jürgen Alzen Motorsport have been created for many years. The displacement of the six-cylinder flat engine is increased from 3.6 to 3.8 liters and the engine is reworked entirely. Company owner Reinhold Schmirler’s power cocktail also includes special combustion chamber shapes as well as precision-machined cylinder heads with larger valves, and high-performance camshafts.

The engine’s peripherals are also completely new. In addition to an intake manifold with larger and smoothened ports the engine is equipped with a more powerful turbocharging system and a high-performance exhaust.

The stock turbos with variable turbine geometry are replaced by larger conventional ones, which are supplied with optimal amounts of exhaust gas by the custom-tailored stainless-steel exhaust manifolds. Higher capacity intercoolers provide cooler charge air for maximum power output, aided on the exhaust side by a stainless-steel sport exhaust with metal catalysts.

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