A twin-turbo V6 engine is rumored to soon be available on the next-generation Lexus IS-F. However, this has yet to be confirmed. A Lexus representative told Autoblog that there are clear advantages in making the switch. It’s currently being powered by a 5.0-liter V8 with an output of 416-hp and 371 lb-ft of torque from a large displacement V8 engine.
Making the switch to a smaller V6 engine, probably a variant of the brand’s 3.5-liter unit, and installing turbochargers may easily offer the same horsepower figures, with the additional benefit of more torque. Furthermore, the smaller forced-induction engine doesn’t just decrease the overall vehicle weight, but should cut weight over the front axle, helping to boost weight balance.
Lastly, a turbocharged setup will enable the car to boost fuel economy significantly by up to 20%. When it comes to internal combustion engine technology, Lexus and its parent Toyota have been falling behind rather than focusing on advancing its hybrid powertrains.
Automotive News is saying that this is changing as turbocharged engines may soon arrive in the foreseeable future as Toyota aims to comply with increasingly stricter emissions standards.
Most of the new IS-F’s development occurred at Japan’s Fuji Speedway and Higashi-Fuji Technical Centre. Based on the rear-wheel drive technology established by the Lexus IS, the IS-F comes with a double-wishbone front and multi-linked rear suspensions. To top the IS performance, the Lexus engineering team set higher demands from the new IS-F.
This resulted in a highly-tuned 5.0-litre V8 engine, featuring specifically designed heads supported by a two-staged intake system, that creates more than 400 horsepower and torque of more than 350 ft.-lbs. The new IS-F is outfitted with coolers for engine oil and transmission fluid for high-speed functions and a scavenge pump for cylinder heads to facilitate driving at high g-forces.
The IS-F’s V8 engine powers through the first ever eight-speed direct sport-shift transmission. A new torque-converter with lock-up control was engineered, allowing for clear, clean gear changes through the torque converter’s constant lock-up in second to eighth gear. In drive, the IS-F’s transmission functions incredibly smoothly, and the torque converter provides excellent launching ability for fast acceleration from a standing start. It can go from zero to 60 in less than 4.9 seconds.
This singular transmission set up also includes an advanced manual mode. Two paddles are just a fingertip reach behind the steering wheel allowing the driver to smoothly shift gears with amazing speed, within a tenth of a second. When the driver downshifts, extremely accurate throttle blips match the vehicle’s speed to the engine’s RPM.
To achieve this impressive level of acceleration, the IS-F needed to be fitted with tough Brembo brakes that were designed to the meet Lexus engineering specifications. Extremely large, 14.2-inch front discs are cross-drilled and gripped by unyielding, strong six-piston aluminium callipers, 13.6-inch cross-drilled rear discs have two-piston callipers. All four wheels are equipped with high-friction brake pads. For the first time on one of its production vehicles, the Lexus name appears on the brake callipers.