Radical SR8 LM ラップタイム

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The Radical SR8 LM represents the track-focused evolution of Radical Motorsport's SR8 platform, produced as limited-production sports prototype prioritizing ultimate lap time performance over road-legal compliance. Powered by Radical Performance Engines RPE-Suzuki 2.8L V8 producing 380 horsepower at 10,500rpm and 221 lb-ft torque, derived from two Suzuki Hayabusa motorcycle engines joined at a common crankcase, the SR8 LM delivered exceptional power-to-weight ratio through six-speed sequential transmission driving rear wheels via limited-slip differential.

Weighing approximately 1,433 pounds thanks to carbon fiber monocoque construction, aggressive aerodynamic package, and elimination of all non-essential equipment, the SR8 LM achieved remarkable performance enabling sub-7-minute Nürburgring Nordschleife lap times and competitive pace against purpose-built GT3 machinery. Aerodynamic development focused on maximum downforce through ground-effect underbody tunnels, large rear wing, and front splitter generating over 2,600 pounds of downforce at 150mph, while double-wishbone suspension with adjustable dampers and anti-roll bars enabled precise setup for varying circuit characteristics.

Braking system featured AP Racing six-piston calipers with ventilated carbon-ceramic discs providing repeatable performance during extended track sessions, while sequential gearbox offered lightning-fast shifts through paddle actuators. Interior reflected pure competition focus with FIA-specification roll cage, six-point harness, digital dash display, and driver-adjustable traction control enabling setup changes on-track. The SR8 LM competed in various sports car championships including European Le Mans Series and national endurance racing, establishing Radical's reputation for accessible high-performance track cars bridging gap between amateur racing and professional motorsport. Production limited to customer orders with extensive factory support programs including arrive-and-drive championship series, driver training, and comprehensive trackside assistance. Today SR8 LM examples remain popular choice for track day enthusiasts and amateur racers seeking professional-grade performance without GT3 acquisition costs, valued for Radical's proven reliability, extensive parts support, and active global racing community maintaining competitive one-make series worldwide.

オーイーエム仕様

Powertec RPB 72 Degree V8 w/GSXR 1300 Cylinder Heads

2008: The SR8 LM debuted with a 2.7L RPE V8 engine producing around 455 hp. The car was based on Radical's lightweight, high-downforce chassis and featured advanced aerodynamics with a large rear wing, front splitter, and side air intakes. It was designed for professional track use and came equipped with fully adjustable suspension, race-grade brakes, and a sequential gearbox.

2009: Radical made slight adjustments to improve engine durability and performance. This year, the SR8 LM set a Nürburgring Nordschleife record for a production-based car, achieving a lap time of 6:48, which brought significant attention to the model. Radical continued refining aerodynamics for optimal stability at high speeds, focusing on minor chassis reinforcements for added rigidity.

2010: Radical upgraded the SR8 LM’s cooling system and made adjustments to the ECU tuning for better throttle response and power delivery. Optional lightweight body panels became available, further reducing weight for improved acceleration and handling on the track.

2012: Radical introduced the upgraded 2.8L RPE V8 engine option, pushing power output to 460 hp. This engine update provided even greater performance and a higher redline, allowing for quicker lap times. Radical also made improvements to the braking system, offering better heat dissipation and durability for endurance events.

2014: he SR8 LM received enhanced suspension components with increased adjustability, allowing drivers and teams more fine-tuning options for various track conditions. Radical also updated the steering system for better feedback and precision, improving the car’s handling and driver engagement on the track.

2015: Radical introduced an improved electronics package, including advanced data-logging and telemetry features, which provided drivers and teams with real-time performance data. Minor ergonomic updates were made to the cockpit, enhancing driver comfort for long track sessions, though the focus remained on track performance.

2017: The final year of the SR8 LM's production included minor adjustments to ensure reliability and maintain performance standards. Radical focused on reinforcing proven components and integrating further lightweight materials in preparation for the next generation of Radical race cars.