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McLaren M838T engine
| Field | Value |
|---|---|
| production | 2011-2021 |
| name | McLaren M838T engine |
| manufacturer | McLaren & Ricardo |
| image | McLaren M838T (in MP4-12C chassis).jpg |
| caption | The M838T engine, in a McLaren 12C rolling chassis |
| configuration | 90° flat-plane V8 |
| valvetrain | DOHC 4 valves x cyl. |
| displacement | 3799 cc |
| bore | 93 mm |
| stroke | 69.9 mm |
| turbocharger | MHI Twin-turbo with intercooler |
| fueltype | Unleaded petrol + Ethanol (both blends may vary) by Esso/ExxonMobil Synergy (2011-2016) later BP Ultimate (2017-2020) later Gulf Pro/Endurance Fuels (2021) |
| fuelsystem | Fuel injection |
| coolingsystem | Water-cooled |
| redline | 8500 |
| power | 500-800 PS |
| torque | 540-720 Nm |
| weight | 199 kg |
| successor | McLaren M840T |
The McLaren M838T engine is a 3798.6 cc 90-degree twin-turbocharged flat-plane V8, designed and developed in collaboration with Ricardo.{{cite web |url-status = dead
Development
McLaren bought the rights to the Tom Walkinshaw Racing developed engine, itself based on the Nissan VRH engine architecture, 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. In only 18 months, Ricardo went from a modified Nissan engine design to a running prototype.
The Ricardo-developed engine redlines at 8500 rpm, but 80% of the engine's torque is available as low as 2000 rpm.{{cite web| url=http://www.edmunds.com/insideline/do/Features/articleId=156926| title=McLaren MP4-12C First look| publisher=Edmunds.com| date=2009-10-13}}{{cite web| url=http://www.mclarenautomotive.com/uk/default.aspx#/p11/explode| title=The Official McLaren Automotive Website| date=2010-02-03| access-date=30 April 2011| archive-url=https://web.archive.org/web/20091001055450/http://www.mclarenautomotive.com/uk/default.aspx#/p11/explode| archive-date=1 October 2009| url-status=dead}} McLaren claims that the engine has the highest horsepower to emission ratio of any current production engine.
The engine is built at Ricardo's engine assembly facility in Shoreham-by-Sea, West Sussex. The turbochargers are supplied by Mitsubishi Heavy Industries (MHI), and are different units from those used in Mitsubishi Lancer Evolutions.
Applications
The engine was designed and built for the McLaren MP4-12C, where it produces 600 PS at 7000 rpm and 600 Nm at 3000 rpm of torque. In 2012 McLaren released an update increasing power to 625 PS at 7500 rpm. For the GT3 racecar, the engine produces less power at only 500 PS.
The engine has a bore and stroke of 93x69.9 mm and a bore spacing of 108 mm.
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 bhp at 7,200 rpm with an additional 176 bhp 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.
| Models | Years | Codename | Power | Torque |
|---|---|---|---|---|
| MP4-12C | 2011–2012 | M838T | 600 PS | |
| at 7000 rpm | 600 Nm | |||
| at 3000 rpm | ||||
| 2013–2014 | 625 PS | |||
| at 7500 rpm | ||||
| MP4-12C GT3 | 2011–2015 | 500 PS | - | |
| 650S | 2014–2017 | 650 PS | ||
| at 7250 rpm | 680 Nm | |||
| at 6000 rpm | ||||
| 675LT | 2015–2017 | 675 PS | ||
| at 7100 rpm | 700 Nm | |||
| at 5500 rpm | ||||
| MSO 688 HS | 2016–2017 | 688 PS | ||
| P1 | 2013–2015 | M838TQ | 737 PS at 7200 rpm | |
| Electric: 179 PS | ||||
| Total: 916 PS | 720 Nm | |||
| Electric: 260 Nm | ||||
| Total: 980 Nm | ||||
| P1 GTR/LM | 2015–2017 | 800 PS at 7250 rpm | ||
| Electric: 200 PS | ||||
| Total: 1000 PS | Total: 1050 Nm | |||
| 540C | 2016–2021 | M838TE | 540 PS | |
| at 7500 rpm | 540 Nm | |||
| at 3500–6500 rpm | ||||
| 570S | 570 PS | |||
| at 7400 rpm | 600 Nm | |||
| at 5000–6500 rpm | ||||
| 600LT | 2018–2021 | 600 PS | ||
| at 7500 rpm | 620 Nm | |||
| at 5500–6500 rpm | ||||
| 620R | 2020–2021 | 620 PS | ||
| at 7500 rpm | 620 Nm | |||
| at 5500 rpm |
References
References
- Orlove, Raphael. (10 March 2017). "This 20-Year-Old Nissan Is The Origin of All of McLaren's Modern V8s".
- Sherman, Don. (2011-02-01). "2012 McLaren MP4-12C Tech Trickledown". Car & Driver.
- Crosse, Jesse. "Super car, super engine". Ricardo Quarterly Review.
- (2009-09-08). "McLaren MP4-12C - the first official P11 story".
- (13 February 2011). "New Ricardo engine assembly facility commences pilot production". ricardo.com.
- (2011-10-19). "Accelerated development: Ricardo-McLaren M838T". Automotive Engineer.
- Dobie, Stephen. (2011-05-04). "evo: McLaren MP4-12C GT3 racing car: new pictures and video". EVO.
- Kavanagh, Jason. (2012-09-04). "2012 McLaren MP4-12C: Dyno Tested". Edmunds.
- "McLaren News - McLaren P1 Twin Power".
- "McLaren Ultimate Series - P1™ GTR".
- Mihalaşcu, Dan. (29 May 2017). "Lanzante's McLaren P1 LM smashes Nürburgring lap record with 6min43.2s run". Mobiventura.
- "McLaren 540C Technical specification".
- "McLaren 600LT Technical specification".
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