McLaren 650S

Overview
Manufacturer McLaren Automotive
Production 2014–present
Assembly Woking, Surrey, England
Designer Frank Stephenson
Body and chassis
Class Supercar
Body style 2-door coupé
2-door roadster
Layout Rear mid-engine, rear-wheel-drive
Related McLaren 12C
McLaren P1
Powertrain
Engine McLaren M838T twin-turbo 3.8 L V8
Transmission 7-speed dual-clutch
Chronology
Predecessor McLaren 12C
The McLaren 650S is a supercar designed and manufactured by McLaren Automotive. It was announced in February 2014 as a new model, but based on the existing McLaren MP4-12C with 25% new parts,[1] and was formally unveiled at the 2014 Geneva Motor Show.[2]

The 650S shares the MP4-12C's Carbon-fiber-reinforced polymer chassis, and is powered by the same McLaren M838T 3.8-litre V8, twin-turbo engine, but now developing 641 bhp (478 kW; 650 PS) and 500 lb·ft (680 N·m) of torque.[3] Power is transmitted to the wheels through a seven-speed near instantaneous shift dual-clutch gearbox.[4]

The 650S has a claimed top speed of 333 km/h (207 mph), and can accelerate from 0–100 km/h (0–62 mph) in 3 seconds and from 0–200 km/h (0–124 mph) in 8.4 seconds.[5]

Contents  [hide]
1 Variants
1.1 650S Spider (2014–)
1.2 625C (2015–)
1.3 675LT (2015–)
2 Motorsports
2.1 GT3
3 References
4 External links
Variants[edit]
650S Spider (2014–)[edit]

Rear view of 650S Spider
First announced in March 2013, the 650s Spider is a convertible version of the 650S. It weights 40 kilograms (88 lb) more than the coupe, but it offers nearly identical performance. It can accelerate from zero to 60 mph in 3 seconds and has a top speed of 204 mph.[6] Up to 25 percent of the parts are new compared to the McLaren 12C Spider.

625C (2015–)[edit]
In September 2014, McLaren launched an additional model to the range, the McLaren 625C, available in both coupé and roadster versions initially aimed at specific markets in the South Asia Pacific region.[7]
Body and cabin[edit]
The 675LT utilizes a new rear wing/air brake assembly 50% larger than that used in the 650S, along with a new carbon fibre diffuser and an 80% larger front splitter with sizeable endplates that together increase total downforce by 40%.[11]

New carbon fibre pieces include both the front and rear bumpers as well as front undertray, rear fenders, side intakes and decklid that contribute to the significant weight savings over the 650S.[11] Alcantara is used throughout the interior where carpeting is removed and removal of the air conditioning unit and new carbon fibre race seats together save 26.5 kg (58 lb). 1 millimetre thinner window glass further reduces weight by 3 kg (7 lb). This extreme focus in weight saving results in a dry weight of 1,230 kg (2,712 lb), some 100 kg (220 lb) less than the 650S.[11]

Drivetrain[edit]
Main article: McLaren M838T engine
The car is powered by a variation of the M838T 3,799cc twin-turbo V8 petrol engine, producing 675 PS (496 kW; 666 hp) at 7100 rpm and 516 lb·ft (700 N·m) at 5500 rpm. This is achieved through the addition of new lightweight connecting rods, bespoke camshaft, a electronic recirculation valve and a lightweight titanium exhaust. Also used in the engine are revised turbocharger compressor wheels and an optimised fuel pump.[10]

The 675LT uses the seven-speed automatic dual-clutch gearbox used in the 650S, with improved software reducing the shift time.[10]

Performance[edit]
The 675LT can accelerate from 0–100 km/h (62 mph) in 2.9 seconds and 0–200 km/h (120 mph) in 7.9 seconds, continuing to a claimed top speed of 330 km/h (210 mph).[12]

Nomenclature[edit]
The '675' in the 675LT model name refers to the power output of 675 PS, following the naming scheme started by the McLaren 650S. The LT in the model name is a reference to the "Long Tail" 1997 McLaren F1 GT which was the final incarnation of the F1 road car built to comply with FIA homologation regulations for the 1997 F1 GTR. The F1 GT featured extended front and rear overhangs that produced similar downforce to the previous homologation special, the F1 LM, without the use of a drag-inducing fixed rear wing.

Motorsports[edit]
GT3[edit]
In June 2014, McLaren announced that they would produce a GT3 version of the 650S, either as a new car or as an upgrade for the existing 12C GT3 – which will contest GT3 championships from 2015 onwards.[13]

Changes to the car include a new seven-speed sequential motorsport gearbox; 380mm ventilated brake discs with six-piston calipers at the front and four-piston units at the rear; a 52mm wider track; revised suspension geometry and upgraded components. It is distinguished from the road car by larger air intakes and front splitter, and carbon-fibre air intakes and a new rear wing.

The 3.8-litre McLaren V8 twin-turbo engine, also used in the 12C-GT3, produces 493 bhp (368 kW; 500 PS), and includes a new ECU to improve turbo boost and gearshifts. The power output is lower than the road going 650S’s due to Homologation.

Andrew Kirkaldy, whose CRS Racing team developed the GT3 version of the McLaren MP4-12C, said that they were aiming to develop a version that conforms to the LM GTE regulations at the 2016 24 Hours of Le Mans.[14]

References[edit]
Jump up ^ "McLaren 650S (2014) first official pictures". Car. 17 February 2014. Retrieved 19 February 2014.
Jump up ^ "McLaren reveals new 650S supercar". USA Today. 17 February 2014. Retrieved 19 February 2014.
Jump up ^ "McLaren reveals details of 650S". Daily Telegraph. 17 February 2014. Retrieved 19 February 2014.
Jump up ^ "2015 McLaren 650S Performance and Styling". 2015CarReviews.com. Retrieved 7 April 2014.
Jump up ^ Tim Hutton (17 February 2014). "Official: 2015 McLaren 650S". GTspirit. Retrieved 19 February 2014.
Jump up ^ "2015 McLaren 650S Spider". Top Speed. February 4, 2014. Retrieved February 17, 2015.
Jump up ^ "New McLaren 625C revealed". Autocar India. 30 September 2014. Retrieved 3 October 2014.
Jump up ^ "McLaren reveals softened 625C for Asian market". Auto Express. 26 September 2014. Retrieved 3 October 2014.
^ Jump up to: a b Pattni, Vijay. "First pics of the new McLaren 675LT". topgear.com/uk (Top Gear). Retrieved 26 February 2015.
^ Jump up to: a b c d e "McLaren Automotive - McLaren 675LT - Performance". . McLaren. Retrieved 4 March 2015.
^ Jump up to: a b c "McLaren Automotive - McLaren 675LT - Design". cars.mclaren.com. McLaren. Retrieved 4 March 2015.
Jump up ^ "McLaren Automotive - McLaren 675LT - Specification".
Jump up ^ "McLaren 650S GT3 Announcement website". Mclarengt.com. Retrieved 4 July 2014.
Jump up ^ Watkins, Gary (1 July 2014). "McLaren closing on return to the Le Mans 24 Hours with 650S GT car". autosport.com. Retrieved 2 July 2014.
Powered by the same 3.8-litre twin-turbocharged V8 engine, but with a reduced power output of 616 bhp (459 kW; 625 PS). The 625C is fitted with new dampers and a revised suspension setup, including softer spring rates. Braking is by cast-iron discs instead of the carbonfibre-ceramic units fitted to the 650S. Top speed remains the same as the 650S but acceleration 0–100 km/h (0–62 mph) is slightly slower at 3.1 seconds.[8]