Toyota LR engine
The Toyota LR engine is a V10 piston engine built by Toyota.
1LR-GUE
Announced in the Lexus LFA sports car, the 1LR-GUE is a 4,805 cc (293 cu in) DOHC engine. The engine is made from aluminium alloy, magnesium alloy and titanium alloy and is smaller than most V8s.[1]
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.
Keeping with traditional practice for high-performance Toyota engines, Yamaha was contracted to co-develop the 1LR-GUE.[2]
Maximum power output is 412 kW (560 PS) at 8,700 rpm. Maximum torque is 480 N·m (354 ft·lb) at 6,800 rpm. The engine will rev to 9500 rpm, with 90% of its peak torque available from 3,700 rpm to 9,000 rpm. The engine revs from idle to its 9500 rpm redline so quickly that the LFA was fitted with a digital LCD tachometer, due to the inability of an analog gauge to keep pace with how quickly the engine revs.
Bore × stroke (mm): 88.0 × 79.0
Compression ratio: 12.0:1
V angle: 72 degrees
Applications:
See also
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