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The 2011 Lexus IS F Performance Vehicle

Lexus F Performance VehiclesLexus IS F High-Performance Sedan Provides Stimulating Driving Dynamics

Improved Suspension Provides More Driver Confidence

Updated Electronic Power Steering Gives Driver Additional Control

Torsen® Rear Differential Helps Provide Additional Traction

As the first production model to wear the brand’s “F” marquee, the Lexus IS F offers a thrilling, fun-to-drive experience.

The Lexus IS F high-performance sport sedan races into 2011 with several interior updates including LED daytime running lamps, an improved suspension, and a new brake override system.

To improve responsiveness and ride comfort, in addition to providing the driver with more control, engineers revised the Electric Power Steering (EPS) system and suspension.

With revised front and rear spring rates, shock absorber dampening, rear bushings and rear camber angle, the IS F provides a confident ride.

  • The sporty interior is complemented with new IP gauges, a silver colored-trimmed steering wheel, and dark finish aluminum composite ornamentation.
  • The Sport mode switch has also been moved to the steering wheel for easier access.

In addition, vehicles with a Black interior receive Alcantara® seat inserts with leather bolsters that enhance its exhilarating sportiness. An all-new Orange and Black leather interior with contrast stitching flaunts the IS F’s vivacious attitude and replaces the Terra Cotta interior.

Engine/Transmission/Drivetrain/Performance

The Lexus IS F is exclusively powered by a performance-tuned 5.0-liter V8 engine teamed to an eight-speed Sport Direct Shift transmission. The IS F engine produces 416 horsepower at 6,600 rpm and 371 lb.-ft. of peak torque at 5,200 rpm. The engine’s high specific output (83.2 hp/liter) and high operating range (6,800 rpm redline) reflect the thorough attention to detail underlying the core engineering. The resulting performance character, while quite responsive in low-speed situations, provides a rush of power at higher engine speeds.

The forged crankshaft features journals polished to a mirror finish to minimize the friction generated between the connecting rods and the crankshaft. Forged sintered iron alloy connecting rods ensure high-rpm durability. High-flow cylinder heads designed by Yamaha have a lightweight valvetrain, including forged cam lobes on hollow, chain-driven camshafts, with the inside of the shafts serving as oil passages. Titanium intake valves are operated by roller rocker arms.

Innovative technologies help to maximize efficiency and reduce emissions, including the SFI D-4 fuel injection (direct-to-cylinder injection system with secondary port injectors) and the Electronic Throttle Control System with intelligence (ETCS-i). Essentially, SFI D-4 integrates two types of fuel injection: A direct-type high-pressure fuel injection system, which provides a cooling effect in the cylinders and enables the high compression ratio (11.8:1) employed to extract maximum energy from the fuel; a set of low-pressure port fuel injectors that help produce a precise burn to optimize power and efficiency under light- and medium-load conditions.

A dual air-intake system uses a primary intake passage for low and medium engine speeds. In the higher engine speed range (above 3,600 rpm), both the primary and secondary passages are opened, helping boost high-rpm power.

With the IS F 5.0-liter V8, Lexus made a leap in valve-control technology with the Variable Valve Timing with intelligence by an electric motor (VVT-iE). An electric drive motor alters the intake camshaft phasing, which made it possible to expand VVT operational range to lower engine speeds, where engine oil pressure is usually not high enough to operate conventional VVT. The exhaust camshaft uses hydraulically controlled variable valve timing.

A scavenge pump forces oil from the cylinder heads back to the oil pan, ensuring a reliable oil supply even during cornering that exceeds one g. The low-restriction dual-exhaust system terminates in distinctive stacked quad diffusers.

The world’s first eight-speed Sport Direct-Shift automatic transmission combines the performance characteristics of an automated manual-type transmission with the smoothness and refinement of a planetary-type automatic transmission. As a result, the driver can choose between ultra-quick manual shifts for performance driving and smooth automatic shifts when convenience is the top priority.

Eight speeds allow gear ratios that maximize torque up to the tire-grip limitations in the lower ranges while optimizing efficiency. Intuitive powertrain control optimally smoothes out off-the-line response. The driver can select Normal, Sport or Snow driving modes with the flip of a switch. Artificial Intelligence-SHIFT (AI-SHIFT) complements the driver’s Sport switch selection by automatically adapting the shifting based on road conditions and driver input. The IS F transmission is also highly responsive to uphill/downhill driving, always selecting the best gear for power or engine braking.Lexus F Performance Vehicle

The driver can shift manually using either the console shift or steering-wheel-mounted paddle shifters. Hydraulic-control technology allows the IS F’s eight-speed Sport Direct Shift transmission to perform on par with manual transmissions without sacrificing the smoothness of a torque-converter automatic. Paddle-shifting operation is allowed in either D or M modes, but shifts are quicker and more direct in M mode.

In M mode, the transmission will hold each gear to the 6,800-rpm redline, and upshifts are executed in just one-tenth of a second. At higher engine speeds, downshifts are accompanied by automated and precise throttle blips to match engine rpm to vehicle speed.

Chassis/Body/Suspension/Tires/Brakes

The Lexus IS F is based on the robust IS platform, which was engineered from the start to allow a high dynamic envelope. The stiff body structure and the rear subframe are connected through several reinforcements. Much of the IS F development took place at racetracks around the world, including Germany’s legendary Nurburgring Nordschleife, Circuit Paul Ricard in France, Japan’s Fuji Speedway and the Higashi-Fuji Technical Center in Japan. Fuji Speedway is the IS F’s home circuit, and the shape of its turn one inspired the F logo design.

Although using the basic double-wishbone front suspension and multi-link rear suspension configurations of the IS platform, the IS F features a multitude of track-proven modifications. The IS F sits an inch lower on its suspension than the standard IS models, which lowers the center of gravity and helps provide a quicker handling response.

Spring and damper rates are increased, and larger-diameter stabilizer bars are used. The rear-suspension control arms are specific to the IS F to optimize geometry for the 19-inch wheels. In addition, the monotube shock absorbers use a larger-diameter piston rod. As on other IS models, the sophisticated shock-absorber design utilizes multi-leaf linear control valves to help improve damping force, and rebound springs offer improved body control without degrading ride comfort.

Subframe suspension mounts are stiffer than on other IS models to help reduce sway and ensure control under acceleration and braking. The engine mounts are also stiffer for a more direct feel. Special jounce stoppers on both the front and rear suspension come into play early in the compression stroke to help reduce the sway angle when cornering and to reduce dive when braking.

The IS F features 19-inch forged-alloy wheels by BBS® with a distinct dark-gray finish and an asymmetrical 10-spoke design. The front wheels are 19 x 8J, with 225/40R19 tires and 19 x 9J in the rear, with 255/35R19 tires. Michelin Pilot Sport PS2 and Bridgestone Potenza tires were each developed specifically for the 170-mph track capability of the Lexus IS F. High-rigidity hub unit bearings are engineered for rigorous, high g-force track driving. The direct-type tire pressure monitor system allows two sets of tires to be registered, giving the customer the benefit of a system with a set of track tires or winter tires. The multi-information display indicates the tire selector switch.

A specially calibrated version of Lexus’ innovative Vehicle Dynamics Integrated Management (VDIM) system helps provide superior handling dynamics and traction control. Combining input from a variety of sensors, VDIM is designed to anticipate the onset of a vehicle skid or slide and help correct the situation with a combination of braking, steering and throttle control in a way that is essentially transparent to the driver. VDIM integration provides precise management for EPS, Vehicle Stability Control (VSC), traction control (TRAC), the Anti-lock Braking System (ABS), Brake Assist (BA), Electronic Brake force Distribution (EBD), and engine torque (via the electronically controlled throttle).

During cornering, VDIM suppresses any tendency for the inside wheel to spin, transmitting more power to the outside wheel to help maintain traction and momentum. When braking on a mixed-friction surface, VDIM will direct steering assist in the direction that will help provide greater control.

In Sport mode, VDIM allows higher dynamic thresholds before intervening and alters steering assist to increase steering feel. Sport mode helps provide excellent optimal vehicle control on a track in areas where the skills of even top-level drivers are challenged. The experienced driver can disengage VSC/TRAC by pressing and holding the TRAC-off button for more than three seconds. Even with VSC/TRAC disengaged, however, the system still provides the brake-based limited-slip differential effect and ABS. The Torsen® rear differential helps provide additional traction in spirited driving.

Brembo brakes were designed to the specifications of the Lexus engineering team. The 14.2-inch ventilated, drilled front rotors are gripped by rigid, powerful six-piston aluminum calipers, while the 13.6-inch ventilated, drilled rear rotors use two-piston calipers. Front bumper ducts adjacent to the fog lamps stream cooling air to the brakes. The brakes are finished with the Lexus name displayed on the calipers.

The story behind the Lexus IS F

Irresistible Force Creates Movable Object

Yukihiko Yaguchi is a quiet, self-effacing engineer. But he’s also convincing and compelling—and tends to accomplish whatever he sets his mind to. For the 30 years he’s been at Toyota, he’s wanted to build a car that he’d want to drive and own. During his tenure at Lexus, Yaguchi has worked on the first and second iterations of the Lexus LS luxury sedan, the turbo-charged Toyota Supra and the first Lexus GS sport sedan. But none of those cars, however excellent, scratched his hardcore performance itch.

Lexus F Performance VehicleWhat he had in mind was a take-no-prisoners premium sport sedan that would equal or beat the best of its class from Europe. One with huge horsepower, racetrack-inspired handling and enormous stopping power.

Eventually, he got tired of waiting.

Yaguchi recruited his own special “skunk works” team—an under-the-radar operation populated by speed-hungry rogue engineers. This small group worked tirelessly in their spare time between regular assignments and developed their own vision for a true Lexus performance vehicle.

With the help of Toyota Technocraft, the IS F boasts aggressive aerodynamics, an eight-speed Sport Direct-Shift transmission with paddle shifters, Brembo® disc brakes [1] that feature huge 14.2-inch cross-drilled discs and six pistons per caliper up front, 19-inch wheels [2] and a specially tuned suspension system. Yamaha’s Formula One engine program helped as well—developing the IS F’s DOHC 5.0-liter V8. They packed it with more than 416 horsepower [3]—enough to blast the IS F to 60 mph in just 4.6 seconds [3] [4].

Then, they tested the IS F at racetracks including the legendary Nurbürgring Nordschleife in Germany, Circuit Paul Ricard in the South of France, Circuit Zolder in Belgium, Laguna Seca Raceway in California and Fuji Speedway in Japan. In fact, Fuji Speedway is the IS F’s home circuit, and its many turns were the inspiration for the F-logo design. By the time testing was concluded, there’d never been a Toyota or a Lexus production vehicle that had been so rigorously track tested around the world.

The result is a true performance car for serious racing enthusiasts. It’s the IS F, and its one of our proudest achievements to date. Finally, a car that Yukihiko Yaguchi wants to drive.

For more information the 2011 Lexus IS F Click here: www.lexus.com

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