The most awarded SUV ever and the most capable full-size SUV on the planet, 522 kW Jeep Grand Cherokee Trackhawk, has been transformed into the most powerful and quickest SUV ever. 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 110 bar (1,600 psi) – the equivalent of five family sedans standing on each piston, every two revolutions. The unique, specially tuned crankshaft damper has been burst tested to 13,000 rpm.
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 aluminum-alloy cylinder heads are optimized 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 degrees Celsius (1,652 degrees Fahrenheit).
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 14,600 rpm. 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 Jeep Grand Cherokee 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 degrees Celsius (140 degrees Fahrenheit), under extreme ambient conditions, while enabling air flow of up to 30,000 liters per minute.
A new fuel delivery system, featuring two high-flow, multi-mode pumps, matches the high-performance demands of the engine.
The Jeep Grand Cherokee Trackhawk rides one inch lower than non-SRT Jeep Grand Cherokee models and is further set apart with body-colored wheel flares, side sill cladding and a sculpted hood with dual heat extractors.
The signature seven-slot upper front grille is flanked by adaptive, bi-xenon headlamps and surrounded by an LED character lamp treatment. The headlamps on the Jeep Grand Cherokee Trackhawk model feature a unique Gloss Black background to accent their jewel-like appearance.
The fog lights are absent from the Trackhawk’s front fascia to optimize airflow to cooling modules and air induction without compromising the vehicle’s balance.
From behind, the Jeep Grand Cherokee Trackhawk features a unique Gloss Black rear valence that showcases four-inch Black Chrome quad exhaust tips. The new quad exhaust system design provides an exhilarating and unmistakable note during maximum acceleration.
New high-performance Brembo brakes include the largest standard front brakes ever offered on a Jeep vehicle. Up front are 400 mm (15.75-inch) two-piece vented rotors with six-piston calipers painted with a new distinctive yellow finish, and 350 mm (13.78-inch) vented rotors with four-piston yellow calipers in the rear for outstanding stopping performance, heat management and durability.
The new Brembo brakes bring the Jeep Grand Cherokee Trackhawk to a stop from 100 km/h in 35 m. For added safety, the anti-lock braking, electronic stability control and traction systems are uniquely tuned.