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The most powerful and quickest SUV ever!

13 April 2017

The 707-horsepower 2018 Jeep Grand Cherokee Trackhawk has a supercharged 6.2L V8 engine, making it capable of 0-60mph in 3.5 seconds.

Jeep Grand Cherokee Trackhawk (Credit: Jeep)

The new benchmark 707-horsepower supercharged engine combines with an upgraded high-torque capacity TorqueFlite eight-speed automatic transmission, enhanced on-road driving dynamics and new Brembo brakes to deliver a new level of performance: 0-60mph in 3.5 seconds, quarter mile in 11.6 seconds at 116mph, top speed of 180mph, 60-0mph braking distance in 114ft and .88g capability on the skid pad.

707 horsepower courtesy of supercharged 6.2L V8

Powering the 2018 Jeep Grand Cherokee Trackhawk is a supercharged 6.2L V8 engine delivering 707 horsepower and 645lb.-ft. of torque.

The breakthrough supercharged engine is designed and manufactured using only the strongest and most durable materials. Its cast iron block features water jackets between the cylinders for optimal cooling. A forged-steel crankshaft with induction-hardened bearing surfaces is so strong it can withstand firing pressures of nearly 1,600psi (110 bar) – the equivalent of five family sedans standing on each piston, every two revolutions. The unique, specially tuned crankshaft damper has been burst tested to 13,000rpm.

High-strength, forged-alloy pistons – developed using advanced telemetry measurement – are coupled to powder-forged connecting rods with high-load-capacity bushings and diamond-like, carbon-coated piston pins.

Premium grade, heat-treated aluminium-alloy cylinder heads are optimised for superior thermal conductivity. Sodium-cooled exhaust valves feature hollow-stem construction and special steel-alloy heads that stand up to temperatures as high as 900°C.

The 2,380cc per revolution supercharger includes integral charge-air coolers and an integrated electronic bypass valve to regulate boost pressure to a maximum of 11.6psi (80 kPa). The twin-screw rotors are specially coated with:

• a proprietary formula of polyimide and other resins
• nanometre-sized, wear-resistant particles
• solid lubricants, such as PTFE (Teflon)

The coating enables tighter clearance between the rotors. This reduces internal air leakage, delivering improved compressor performance and higher efficiencies. The coating can withstand the temperatures generated by compression, and provides superior corrosion resistance.

The supercharger is sealed for life with premium synthetic oil, uses a drive ratio of 2.36:1 and has a maximum speed of 14,600rpm. The supercharger drive system’s one-way clutch de-coupler improves refinement, while allowing for precisely the kind of powerful sound certain to captivate Jeep Grand Cherokee Trackhawk drivers.

Air sources for the supercharger include a cold-air scoop in the lower front fascia, which replaces the driver’s-side fog lamp and helps to feed the 92mm throttle body.

The large-nosed crankshaft drives a high-flow gerotor oil pump, which feeds a lubrication circuit that includes eight high-flow piston-cooling jets. A high-capacity oil/air heat exchanger, mounted in the front of the Trackhawk, mitigates oil temperatures when driving conditions are harshest, such as on the track.

A new low-temperature cooling system, consisting of a pump, reservoir, heat exchanger and lines, help keep the charge air cool during performance driving. This system is designed to keep intake air temperatures below 60°C, under extreme ambient conditions, while enabling air flow of up to 30,000L per minute.

A new fuel delivery system, featuring two high-flow, multi-mode pumps, matches the high-performance demands of the engine.

Built in Detroit at the Jefferson North Assembly Plant, the 2018 Grand Cherokee Trackhawk will arrive in Jeep showrooms in the fourth quarter of 2017.

The most powerful and quickest SUV ever - product specifications apply to the US market only.


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