McLaren M838T engine

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The M838T engine, in a McLaren MP4-12C rolling chassis

The McLaren M838T engine is a 3.8 litre twin-turbocharged flat-plane V8, produced in partnership by Ricardo plc and joint venture with Ilmor for McLaren Automotive.

Development[edit]

McLaren bought the rights to the Tom Walkinshaw Racing-developed version of the Nissan VRH35 racing engine, as used in Le Mans in 1998. However, other than the 93 mm bore, little of that engine remains in the M838T.[1]

Developed with help from Ricardo with technology acquired from Menard Competition Technologies, it is McLaren's first engine.[2] The engine redlines at 8500 rpm, however 80% of the engine's torque is available as low as 2000 rpm.[3][4] McLaren claims that the engine has the highest horsepower to CO
2
emission ratio of any current production engine.[5]

The engine is built at Ricardo's engine assembly facility in Shoreham-by-Sea, West Sussex.[6] The turbochargers are supplied by MHI.[7]

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 but in 2012 McLaren released an update increasing power to 616 horsepower. For the GT3 racecar, the engine produces less power at only 493 hp.[8]

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.[9]

Models Years Displacement Aspiration Valvetrain Power Torque Redline(rpm) Weight kg (lbs)
P1 Announced 2013 3,800 cc (3.8 L; 231.9 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)
- -
650S Announced 2014 3,800 cc (3.8 L; 231.9 cu in) Twin Turbocharged DOHC 4-valves per cylinder 650 PS (478 kW; 641 hp) 680 N·m (502 lbf·ft) - -
MP4-12C 2011- September 2012 3,800 cc (3.8 L; 231.9 cu in) Twin Turbocharged DOHC 4-valves per cylinder 600 PS (441 kW; 592 hp)@7000 rpm 600 N·m (443 lbf·ft) 8500 199 (439)
MP4-12C 2013- 3,800 cc (3.8 L; 231.9 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- 3,800 cc (3.8 L; 231.9 cu in) Twin Turbocharged DOHC 4-valves per cylinder 500 PS (368 kW; 493 hp) - - -

References[edit]

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

External links[edit]