McLaren M838T engine

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The M838T engine, in a McLaren 12C rolling chassis

The McLaren M838T engine is a 3.8 litre twin-turbocharged flat-plane V8, designed and developed by in collaboration with Ricardo plc.[1]

Development[edit]

McLaren bought the rights to the Tom Walkinshaw Racing-developed engine which was designed for the IRL Indycar championship but never raced. However, other than the 93 mm bore, little of that engine remains in the M838T.[2]

Developed with help from Ricardo with technology acquired from Menard Competition Technologies, it is McLaren's first engine.[3] The engine redlines at 8500 rpm, however 80% of the engine's torque is available as low as 2000 rpm.[4][5] McLaren claims that the engine has the highest horsepower to CO2 emission ratio of any current production engine.[6]

The engine is built at Ricardo's engine assembly facility in Shoreham-by-Sea, West Sussex.[7] The turbochargers are supplied by MHI, and are different units from those used in Mitsubishi Lancer Evolutions.[8]

Applications[edit]

The engine was designed and built for the McLaren MP4-12C supercar, where it produces 592 horsepower and 466 ft·lbf of torque. However, in 2012 McLaren released an update increasing power to 616 horsepower. For the GT3 racecar, the engine produces less power at only 493 hp.[9]

McLaren and Ricardo redeveloped the M838T engine for use in the McLaren P1. The engine has been upgraded to optimise cooling and durability under higher loads. The engine block has also been modified to incorporate an integrated electric motor as part of a hybrid drive train. The petrol engine produces 727 horsepower at 7,200 RPM with an additional 176 horsepower from the electric motor. At 4,000 RPM the engine is said to produce 720 Nm of torque while the electric motor can produce a maximum of 260 Nm from 0 RPM upwards.[10]

Models Years Displacement Aspiration Valvetrain Power Torque Redline(rpm) Weight kg (lbs)
P1 2014- 3,799 cc (3.8 L; 231.8 cu in) Twin Turbocharged DOHC 4-valves per cylinder 737 PS (542 kW; 727 hp)@7200 rpm
Electric: 179 PS (132 kW; 177 hp)
720 N·m (531 lbf·ft)
Electric: 260 N·m (192 lbf·ft)
- -
675LT Announced 2015 3,799 cc (3.8 L; 231.8 cu in) Twin Turbocharged DOHC 4-valves per cylinder 675 PS (496 kW; 666 hp) 700 N·m (516 lbf·ft) - -
650S 2014- 3,799 cc (3.8 L; 231.8 cu in) Twin Turbocharged DOHC 4-valves per cylinder 650 PS (478 kW; 641 hp)@7250 rpm 680 N·m (502 lbf·ft)@6000 rpm - -
MP4-12C 2011- September 2012 3,799 cc (3.8 L; 231.8 cu in) Twin Turbocharged DOHC 4-valves per cylinder 600 PS (441 kW; 592 hp)@7000 rpm 600 N·m (443 lbf·ft)@3000 rpm 8500 199 (439)
MP4-12C 2013- 3,799 cc (3.8 L; 231.8 cu in) Twin Turbocharged DOHC 4-valves per cylinder 625 PS (460 kW; 616 hp)@7500 rpm 600 N·m (443 lbf·ft) 8500 199 (439)
MP4-12C GT3 2011- 3,799 cc (3.8 L; 231.8 cu in) Twin Turbocharged DOHC 4-valves per cylinder 500 PS (368 kW; 493 hp) - - -
McLaren 540C 2016- 3,799 cc (3.8 L; 231.8 cu in) Twin Turbocharged DOHC 4-valves per cylinder 540 PS (397 kW; 533 hp) 540 N·m (398 lbf·ft) - -
McLaren 570S 2016- 3,799 cc (3.8 L; 231.8 cu in) Twin Turbocharged DOHC 4-valves per cylinder 570 PS (419 kW; 562 hp)@7400 rpm 601 N·m (443 lbf·ft)@5000-6500 rpm - -

References[edit]

  1. ^ "McLaren M838T Engine Claims Victory At International Engine Of The Year Awards". McLarenAutomotive.com. Retrieved 4 March 2015. 
  2. ^ "Car & Driver: 2012 McLaren MP4-12C Tech Trickledown". 2011-02-01. Retrieved 2011-03-27. 
  3. ^ "M2012 McLaren MP4-12C vs. 1995 McLaren F1". Edmunds.com. 2011-04-04. 
  4. ^ "McLaren MP4-12C First look". Edmunds.com. 2009-10-13. 
  5. ^ "The Official McLaren Automotive Website". 2010-02-03. 
  6. ^ "McLaren MP4-12C - the first official P11 story". 2009-09-08. 
  7. ^ "New Ricardo engine assembly facility commences pilot production". ricardo.com. Retrieved 2011-02-19. 
  8. ^ "Accelerated development: Ricardo-McLaren M838T". Automotive Engineer. 2011-10-19. Retrieved 2013-12-21. 
  9. ^ "evo: McLaren MP4-12C GT3 racing car: new pictures and video". Retrieved 5 May 2011. 
  10. ^ "McLaren News - McLaren P1 Twin Power". Retrieved 12 March 2011. 

External links[edit]