For a while, we didn’t know much about the Hellcat engine that will be found in the Dodge Challenger SRT, other than that it’s the most powerful Chrysler V8 engine to date and that it’ll be supercharged. But now, a few more technical details have come to light.
The 6.2 liter supercharged V8 that goes by the name of ‘Hellcat’ is an entirely new engine design and is one of the most talked about happenings of the summer in the high performance arena. According to Dodge, the engine will deliver 600 plus horsepower, but most industry analysts are predicting an output in excess of 650 horsepower.
News to us was the decision to supercharge; the blower employed on this beast is rated at 2,380 cc per rev and spins at 14,600 rpm. The twin screw rotors have a special coating to reduce corrosion and to be conducive to higher tolerances and temperatures. Air enters through a port near the driver’s side marker light and is redirected through an 8 liter air box before reaching the blower. Two air to water intercoolers mounted on the supercharger housing provide a nice cooling supplement. According to Dodge,“So effective is this feature that engine power will not be de-rated due to cooling demands, even after 20 laps of a grueling 3.1-mile road course at an ambient temperature of 100 degrees Fahrenheit (37 degrees Celsius).”
An integrated electronic bypass valve regulates air boost, and a massive 92 mm throttle body controls the power. Fuel delivery is managed by half inch fuel lines and 600 cc/min fuel injectors. The Hellcat also features a high tech lubrication system employing a high-flow gerotor pump, oil-to-air heat exchanger and piston cooling jets.
The valvetrain and exhaust are new and improved, featuring heat treated, steel-alloy cylinder heads with sodium cooled steel exhaust valves. Intake and exhaust valves will lift .561 and .551, respectively. An electronically controlled relief valve will facilitate smooth exit via dual 2.75 inch exhaust pipes.
The new Hellcat has already been extensively tested by the Dodge engineering team, logging over two million hours on the dyno and a series of 24 hour track endurance tests. Expect nothing less than perfection if you ever get behind the wheel of a car with a Hellcat engine. We’ve also heard rumors of the Hellcat making its way into the Charger SRT, as well as other models in the Dodge line.