Dodge Challenger SRT Demon has more G-force than a Bugatti Veyron

Article by Christian A., on June 6, 2017

A bevy of cool facts is now out in the open to help us get more acquainted with the new Dodge Challenger DRT Demon. But while most have already heard about its 840hp and its 2.3-second acceleration to get from zero to 60, there are a few other details we might not have heard about. In a recent interview with the press, Dodge CEO Tim Kuniskis has let out more information about the project. Among them is the stock version’s ability to break the 10-second barrier sans the 100 high octane race fuel.

Starting with the Demon’s V-8 cooling system, we learned that it is actually capable of rejecting 258kW of heat at rated power. The radiator’s heat rejection is equivalent to 250 oven toasters - the same amount of heat required when you need to boil 1 quart of water in a room temperature within 1.2 seconds.

It was also revealed that the Demon’s high- octane fuel can flow at a rate of 1.36 gallons per minute at rated power. In comparison, a typical shower head can flow at the rate of 2 gallons for every 60 seconds.

During a quarter mile run for instance, the V-8 is capable of ingesting 173 cubic feet of air or equal to the lung capacity of 816 humans. At 800 feet into a quarter mile, the V-8 surprisingly can empty out the entire cabin’s 105 cubic feet of air. Meanwhile, the Demon’s piston and connecting rod has been loaded with 11 tons of force on each power stroke. It was also revealed that this occurs 50x per second at approximately 6,300 rounds per minute. Working together, the TransBrake and Torque Reserve can generate up to 317 pound feet of incremental torque for total output of 534lb-ft during acceleration.

With 11,164lb-ft of ring gear at the driveline, remarkably, the Demon has the capacity to generate up to 1.8Gs at launch. Comparing it with Bugatti Veyron’s 1.55G, the Dodge Demon is evidently more capable of pulling off a larger amount of accelerative forces. That’s about 2,500 pounds or 1 ton of gear torque delivered from front to rear wheels off the line.

To give off that massive number of G-force, Dodge’s most potent muscle car is wrapped with a set of 315/40R 18 Nitto NT05R drag radials measuring 18-inches (in diameter) and 11-inches (wide). Since the Demon produces massive amounts of launch force, it also sees the need to depend on transmission locks instead of merely relying on brakes.

Press Release

2018 Dodge Challenger SRT Demon Pulls the Wheels

Details about the supercharged 6.2-liter HEMI® V-8 and powertrain in the 2018 Dodge Challenger SRT Demon:

Displacement: Supercharged 6.2-liter V-8

Construction: Deep-skirt cast iron block; aluminum alloy heads with hemispherical combustion chamber

Output:

840 bhp (626 kW) @ 6,300 rpm; 770 lb.-ft (1,044 N•m) @ 4,500 rpm with Direct Connection Controller and unleaded 100 octane minimum fuel
808 bhp (603 kW) @ 6,300 rpm; 717 lb.-ft (972 N•m) @ 4,500 rpm with Premium 91 octane fuel

Production site: Saltillo Engine Plant, Ramos Arizpe, Mexico

62 percent new content compared with Hellcat V-8: engine block; crankshaft; pistons; connecting rods; supercharger
Cylinder heads machined on dedicated Demon/Hellcat CNC machines
Engine block is deck plate honed to minimize bore distortion
Every Demon and Hellcat engine is dyno tested for 42 minutes under load up to 5,200 rpm before being shipped to assembly plant in Brampton, Ontario

More air: Largest functional hood scoop opening (45.2 square inches) and triple-inlet air box (903.1 cubic inches). High flow, low restriction inlet system designed to deliver cool air into the supercharger.

Air-flow rate: 1,150 cubic feet per minute

SRT Power Chiller™: Redirects air conditioning refrigerant from cabin to chiller unit; reduces charge air temperature by 18 degrees Fahrenheit

Supercharger:

Twin screw, 2.7 liters per revolution
Rotors 1.1 inches longer compared with Hellcat
Maximum boost pressure 14.5 psi compared with 11.6 psi for Hellcat
Dual water/air heat exchangers integrated into supercharger housing
Electric pump flows up to 11.9 gallons per minute

Engine internals:

Forged alloy steel crankshaft with 90.9-millimeter stroke and revised balancing
Induction-hardened crank bearing surfaces; individual journal optimized main bearing clearances
Forged high-strength alloy pistons; 30-micron increased piston to bore clearance
Powder forged connecting rods; upgraded shank and big end; revised ultra-high tensile fasteners
Flow doubled on piston cooling oil jets
Revised design valve springs
33 percent increase in oiling for valve springs and rocker tips – lubrication and cooling
Single-groove collets on valve stems for improved stability
Fuel injector pressure increased 27 percent
Oil pan and windage tray optimized for high acceleration – tested up to 1.8 g

Transmission: TorqueFlite 8HP90 eight-speed automatic

Upgraded automatic transmission torque converter increases torque multiplication 18 percent
Torque converter stall speed increased 11 percent
In Drag Mode, transmission minimizes torque cut during gear changes – 400 millisecond shifts

Drivetrain:

Limited-slip differential
230-millimeter ring gear in high strength alloy, heat-treated aluminum differential housing
3.09 final drive ratio for maximum acceleration
20-percent thicker prop shaft made of high strength, low alloy steel tube; high strength steel stub shafts
Upgraded halfshafts with 8-ball Cross-Glide inner and outer joints; larger diameter barshafts with 41-spline count; high alloy steel inner and outer stub shafts
Nitto drag radial tires achieve up to 40 percent more launch force

Fun facts:

During a quarter-mile run, the Demon V-8 ingests 173 cubic feet of air. That’s equivalent to the lung capacity of 816 humans.
800 feet into a quarter-mile run, the Demon V-8 would empty all the air in the cabin of the Dodge Challenger SRT Demon – 105 cubic feet
Demon V-8 cooling system rejects 258 kW of heat at rated power – that would boil 1 quart of water at room temperature in 1.2 seconds. The heat rejected is equal to 250 electric toasters.
At rated power, high-octane fuel flows at 1.36 gallons per minute. Typical shower head flows at 2 gallons per minute
On each power stroke, piston and connecting rod is loaded with 11 tons of force – equivalent of 5 2018 Dodge Challenger SRT Demons. This happens more than 50 times a second @ 6,300 rpm.
Torque Reserve and TransBrake combined generate 317 lb.-ft. of incremental torque, for total launch torque of 534 lb.-ft.
The driveline sees 11,164 lb.-ft. of ring gear torque at launch. Results in a 1.8 g launch.
More than 1 ton (2,500 pounds) transferred from front to rear wheels at launch

Source: Dodge

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