2021 Dodge Durango SRT Hellcat in Hammond
The heart of the 2021 Dodge Durango SRT Hellcat is the renown, supercharged 6.2-liter HEMI V-8, with 710 horsepower at 6,100 rpm and 645 lb.-ft. of torque.
A hallmark of the Hellcat engine is delivering unmatched, attention-getting performance when ordered up by the driver’s right foot, while also providing smooth and refined power flow during daily driving duties or while cruising the open road.
SRT powertrain engineers developed and tested the Hellcat engine and tailored it to the Durango, ensuring it reliably handles the rigors of spirited driving in track situations for sustained periods of time without needing to de-rate its power output due to high temperatures.
An important part of that strategy, powertrain engineers created a dedicated cooling circuit for the charge air coolers integrated in the supercharger housing. This cooling circuit includes a pump, coolant reservoir and heat exchanger, and is designed to keep the air flowing into the engine cooler than 140 degrees Fahrenheit.
The twin-screw rotors in the supercharger are set close to minimize air leakage and ensure maximum performance. A proprietary coating on the rotors enables the tight fit, minimizes wear and provides corrosion resistance.
An integrated electronic bypass valve regulates boost pressure to a maximum of 11.6 psi (80 kPa). The 2.38-liter supercharger uses a drive ratio of 2.36:1 and has a maximum speed of 14,600 rpm. It is sealed for life with a premium synthetic oil.
Other key components of the Hellcat engine include:
- Cast-iron engine block with water jackets between the cylinders for optimal cooling
- Forged-steel crankshaft with induction-hardened bearing surfaces
- Specially tuned crankshaft damper, burst tested to 13,000 rpm
- High-strength, forged-alloy pistons
- Powder-forged connecting rods with high-load-capacity bushings and diamond-like, carbon-coated piston pins
- Piston-cooling oil jets
- Heat-treated aluminum-alloy cylinder heads
- Sodium-cooled exhaust valves, hollow-stem intake valves and steel-alloy heads that stand up to temperatures as high as 1,652 degrees Fahrenheit (900 degrees Celsius)
A cold-air scoop in the lower front fascia helps feed the supercharger and the Hellcat engine’s 92-mm throttle body.
Two high-flow variable pressure fuel pumps feed the high-performance demands of the Hellcat engine.
The Dodge Durango SRT Hellcat’s exhaust system has been tuned to deliver the throaty, aggressive sound that lets bystanders know this three-row muscle car is something special and distinctly Dodge. The changes include the addition of a 260-millimeter crossover X-pipe, the largest X-pipe in the SRT lineup, to the twin-pipe exhaust.
The Dodge Durango’s Hellcat engine is mated to a robust, quick-shifting, high-performance TorqueFlite eight-speed automatic transmission. The transmission includes provisions for manual shifting via steering-wheel-mounted paddles and has seven available Drive modes – Auto, Sport, Track, Snow, Tow, Eco and Valet.
