Did you guess correctly on Monday?
That engine was definitely the roar of the 6.2-liter HEMI® Hellcat V-8 engine. That one happened to be powering a Dodge Challenger SRT Hellcat. But whether it’s powering a Challenger or a Charger, the 707-horsepower engine, with 650 lb.-ft of torque helps drivers achieve a 22 mpg in highway-cycle driving.
Let’s take a closer look at the HEMI Hellcat:
- Its forged-steel crankshaft is so well engineered it can withstand firing pressures of 1,595 psi (110 bar) – the equivalent of five family sedans standing on each piston, every firing event
- Its twin-screw supercharger, which has polymer-coated rotors, boasts a drive ratio of 2.36:1 and a maximum speed of 14,600 rpm
- A low-temperature cooling circuit with two air coolant heat exchangers integrated into the supercharger housing, keeps charged air temperatures below 140 degrees Fahrenheit (60 degrees Celsius) while enabling air flow of up to 30,000 liters per minute
- Its power is not de-rated due to cooling demands, even after 20 minutes of hard driving on a road course at an ambient temperature of 100 degrees Fahrenheit (37 degrees Celsius)
- Eight injectors served by half-inch fuel lines, each capable of delivering a flow rate of 600 cc/min, can drain the fuel tank in approximately 13 minutes at full power
If you think Monday was easy, let’s see how your ears are on this one.