Pinning a few numbers to the new drag race king

When Dodge pulled the sheets on the utterly insane Challenger SRT Demon back in April at the 2017 New York International Auto Show, months of speculation finally collided with reality, and the result was one of the most badass factory drag racers ever unleashed. The headline specs on the Demon beg belief, with nearly 850 horsepower and 770 pound-feet of torque sent to the rear axle thanks to a supercharged 6.2-liter V-8. Stuffing the engine is a 2.7-liter supercharger producing 14.5 psi of boost, which prompts at 2.3-second sprint in the 60-mph benchmark. Keep your foot down, and you’ll see the quarter mile blitzed in 9.65 seconds at 140 mph. Insanity. Now, Dodge has a full rundown on hard numbers to document that craziness with the release of the Demon’s powertrain spec sheet.

You can check out the attached press release for all the nitty gritty details, but in the meantime, here are a few highlights. For starters, Dodge says the V-8 engine manages to swallow as much as 173 cubic feet of air during a full-throttle quarter-mile run, which is roughly the same volume as the lung capacity of 816 humans. During a hard launch, the Nitto cheater slicks produce upwards of 1.8 g’s of forward acceleration, enough to lift the nose of the car off the ground for a fronts-up wheelie off the line. There’s plenty of other details as well, so read on if you wanna get nerdy with it as we compare it the “standard” Hellcat.

Continue reading for the full press release.

Demon Vs. Hellcat?

2015 Dodge Challenger SRT Hellcat
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2018 Dodge Challenger SRT Demon High Resolution Exterior
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Note: Hellcat on the left, Demon on the right.

When I first heard about the Demon, my initial reaction went something like this – “Wait, they’re building a faster Hellcat?” Truth be told, that’s exactly what’s offered here, so to give you a better handle on what the Demon brings to the party over the “standard” Hellcat, we’ve set up a little comparison.

For starters, the Demon carries a price tag of $84,995, which is a massive $22,500 more than the $62,495 Hellcat. However, for the money, buyers get a ton of extras, including a long list of $1 options that includes a front passenger seat (the Demon comes with just a driver’s seat from the factory), a rear bench (either cloth or leather upholstery), and a carpet kit for the trunk. Dodge is also offering a personalized “Demon Crate” for $1, which throws in a powertrain module for high-octane race fuel, a new air filter, skinny front wheels, a passenger mirror block-off plate, a hydraulic jack, cordless impact wrench, tire pressure gauge, and more.

2018 Dodge Challenger SRT Demon High Resolution Exterior
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Dodge is offering a personalized “Demon Crate” for $1, which throws in a powertrain module for high-octane race fuel, a new air filter, skinny front wheels, a passenger mirror block-off plate, a hydraulic jack, cordless impact wrench, tire pressure gauge, and more.

Speaking of the engine, the Demon’s spec sheet kicks off with a breakdown on the engine upgrades. With a full tank of race fuel (100 octane minimum), peak output is rated at 840 horsepower at 6,300 rpm and 770 pound-feet of torque at 4,500 rpm. Go for the pump gas (91 octane), and output is still a very healthy 808 horsepower at 6,300 rpm and 717 pound-feet of torque at 4,500 rpm. Compared to the Hellcat’s 707 horsepower at 6,000 rpm and 650 pound-feet of torque at 4,000 rpm, that’s a pretty sizable jump, with an extra 133 horses and 120 pound-feet at max. All that newfound muscle comes by way of increased boost, with the Demon producing as much as 14.5 psi compared to the Hellcat’s 11.6 psi.

2015 Dodge Challenger SRT Hellcat
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2018 Dodge Challenger SRT Demon High Resolution Drivetrain
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Note: Hellcat engine on the left, Demon engine on the right.

Compared to the Hellcat’s 707 horsepower and 650 pound-feet of torque, that’s a pretty sizable jump, with an extra 133 horses and 120 pound-feet at max.
Dodge Challenger SRT Demon Dodge Challenger Helcat
ENGINE SUPERCHARGED 6.2-LITER HEMI DEMON V-8 Supercharged 6.2L HEMI® V-8, 90-degree V-type, liquid-cooled
Displacement 370 cu. in. (6,166 cu.cm) 370 cu. in. (6,166 cu.cm)
Bore x Stroke 4.09 x 3.58 (103.9 x 90.9) 4.09 x 3.58 (103.9 x 90.9)
Valve System Pushrod-operated overhead valve, 16 valves with sodium-filled exhausts and hollow stem intakes, 16 hydraulic roller lifters Pushrod-operated overhead valves, 16 valves with hollow-stem, sodium filled exhaust valves, 16 conventional hydraulic lifters, all with roller tips
Fuel Injection Sequential, multiport, electronic, returnless Sequential, multiport, electronic, returnless
Construction Deep-skirt cast-iron block with cross-bolted main bearing caps, aluminum alloy heads with hemispherical combustion chambers Deep-skirt cast-iron block with cross-bolted main bearing caps, unique aluminum alloy heads with hemispherical combustion chambers
Compression Ratio 9.5:1 9.5:1
Power (estimated SAE net) 840 HP @ 6,300 RPM (Direct Connection Performance Engine Controller and high-octane unleaded fuel)
808 HP @ 6,300 RPM
707 HP
Torque (estimated SAE net) 770 LB-FT @ 4,500 RPM (Direct Connection Performance Engine Controller and high-octane unleaded fuel)
717 LB-FT @ 4,500 RPM
650 LB-FT
Max. Engine Speed 6,500 RPM TBD
TRANSMISSION TORQUEFLITE 8HP90 EIGHT-SPEED AUTOMATIC Six-speed manual Tremec TR-6060 with ZF-SACHS 258 MM Twin-disc Clutch or TorqueFlight Eight-speed auto
Torque converter 151k
0 to 60 mph 2.3 seconds 3.6 sec
Quarter mile 9.65 seconds @ 140 mph TBA
Top Speed 190 MPH (est) 200 MPH

Of course, power gains are meaningless unless they translate into more speed, and the Demon delivers with faster acceleration all around. The 0-to-60 mph time drops from 3.5 seconds in the Hellcat to just 2.3 seconds in the Demon, while the quarter miles drops from 11.2 seconds at 125 mph (10.8 seconds at 126 mph on drag radials) in the Hellcat to 9.65 seconds at 140 mph in the Demon. That also makes the Demon quicker in the 1320 than such heavy hitters as the McLaren P1 (9.8 seconds at 149 mph), The Porsche 918 Spyder (9.9 seconds at 146 mph), and Bugatti Veyron Super Sport (9.9 seconds at 146 mph).

That said, we’re still waiting on final numbers on the Demon’s top speed. We did a little speculation as to what that number might be, and long story short, we think that with the right conditions and proper tires, the Demon could achieve 190 mph flat out.

Sharper readers out there will point out how that makes the Demon about 10 mph slower than the less-powerful Hellcat, which is rated at about 200 mph in the top end. So what gives?

2018 Dodge Challenger SRT Demon High Resolution Exterior
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Sharper readers out there will point out that the Demon is about 10 mph slower than the less-powerful Hellcat.

The answer starts with the Demon’s rear end, which receives shorter gearing at 3.09, as compared to the Hellcat’s 2.62 final ratio. Throw in differences in tire size, redline, and most importantly, aero, and even an extra 133 horsepower won’t be enough to topple the Hellcat in a test of v-max.

2018 Dodge Challenger SRT Demon High Resolution Exterior
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Dodge focused entirely on making the Demon the king of the strip, and as such, included the “largest functional hood scoop opening” ever on a production car.

But that’s okay – the Demon is made to live a quarter mile at a time, so losing 10 mph off the top doesn’t really matter. Indeed, Dodge focused entirely on making the Demon the king of the strip, and as such, included the “largest functional hood scoop opening” ever on a production car. Which makes sense, given the Demon’s tendency to swallow atmosphere. Force feeding the blower is a 45.2 square inch hood scoop, while the triple-inlet air box is rated at 903.1 cubic inches. As a result, the airflow rate clocks in at a sizable 1,150 cubic feet per minute.

We can’t stop reading all the awesome tidbits Dodge is throwing our way with this powertrain spec sheet. Which numbers stand out to you? And more importantly, is the Demon worth an extra $20K over the “standard” Hellcat? Let us know in the comments section below.

Read our full review on the Dodge Challenger SRT Hellcat here.

Read our full review on the Dodge Challenger SRT Demon here.

June 2, 2017 , Auburn Hills, Mich. - 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
  • or-
    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

About Dodge and SRT Brands

The Dodge brand is America’s mainstream performance brand. With the purification of the brand and consolidation with SRT, Dodge is focusing on its performance roots with every single model it offers. The Dodge and SRT brands offer a complete lineup of performance vehicles that stand out within their own segments. Dodge is the mainstream performance brand and SRT is positioned as the ultimate performance halo of the Dodge brand, together creating a complete and balanced performance brand with one vision and one voice.

From muscle cars to minivans, crossovers and full-size SUVs, the Dodge brand’s full lineup of 2017 models deliver best-in-class horsepower, class-exclusive technology, unmatched capability and a slew of cool features, such as LED headlamps, Dodge signature racetrack tail lamps, active exhaust, cold-air induction, 8.4-inch touchscreen Uconnect infotainment centers and 7-inch customizable gauge clusters, to name a few. For the 2017 model year, the Dodge brand lineup features the 25th anniversary Viper, Durango, Grand Caravan, Journey, Charger and Challenger, including the new Challenger GT, Charger Daytona and Challenger T/A, as well as the 707-horsepower Challenger SRT Hellcat and the Charger SRT Hellcat, the quickest, fastest and most powerful sedan in the world.

New for 2018, Dodge introduces the new 840-horsepower Dodge Challenger SRT Demon — the fastest quarter-mile car in the world and most powerful muscle car ever, as well as the 2018 Dodge Durango SRT – America’s fastest, most powerful and most capable three-row SUV.

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