Announced in the
Lexus LFA sports car, the
1LR-GUE is a
DOHC 4 valves per cylinder
V10 engine, made from aluminum alloy, magnesium alloy and titanium alloy and is smaller than most
V8s. The oil and water pumps are located at the rear of the engine and the lubrication system uses a
dry sump. Titanium is used for the valves and the rocker arms have a diamond-like coating. Each
cylinder has an independent, electronically controlled
throttle body. Yamaha was contracted to co-develop the 1LR-GUE. The exhaust system was co-developed with Yamaha's music division. The engineers described the sound of the engine as "the roar of an Angel". Maximum
power output is at 8,700 rpm. Maximum
torque is at 6,800 rpm. The engine
redlines at 9000 rpm and has a fuel cut-off at 9500 rpm, with 90% of its peak torque available from 3,700 rpm to 9,000 rpm. An LCD tachometer was fitted to the LFA as an analog fixture allegedly was not responsive enough to the engine's ability to change speed. The
Lexus LFA broke the world record in 2012, for the fastest production engine revving from idle to redline in 0.6 seconds. It features a single circular dial with a central tachometer with an LCD needle. When engine speed exceeds 9000 rpm, the display area turns red to alert the driver to up-shift. •
Bore ×
stroke: × •
Compression ratio: 12.0:1 • V angle: 72 degrees • Exhaust emissions certification: Euro 5 Applications: •
Lexus LFA ==See also==