2018 Dodge Challenger SRT® Demon FAQ

So you’ve ordered your Dodge Challenger SRT® Demon, and it’s here! Whether you’re just picking it up from the dealership or you’ve done your first burnout, you might have questions about the world’s fastest quarter-mile production car. Let’s get them answered.

Before You Pick It Up


Yes, the SRT Demon is a street-legal automobile and will come to you ready to drive.

You can order the SRT Demon Crate from the Concierge: 800-998-1110, and it comes with the Mopar Direct Connection performance parts, personalized badges and SRT Demon-branded track tools.

No, Dodge recommends at least 500 miles of break-in time before you change the PCM and 1500 miles before you start making drag passes. Please read your supplement, tip card, and track tech manual for the recommended break-in process.

This is between you and the dealer. The PCM is the only thing that has to be done by the dealer. The switch bank upgrade, air filter and mirror delete plate can be done by the customer or by the dealer.

No, the tires don’t come with the skinny wheels. The front wheels are 18x4.5 inches. There are a couple different tire brands to choose from, one which we have used is 28/4.5-18, and should be available from any of the large performance parts warehouses.

The SRT Demon has much less noise and vibration insulation (NVH) than a standard street car. You’ll be able to hear more mechanical sound than you might be used to.


Before You Race


Testing was done with Sunoco 260GT or 260GT+. When adding high octane fuel, remember that you may be mixing with pump gas in the tank. You need to make sure though that the octane rating in the tank averages 100 octane.

Simple formula:

(A x octane rating) + (B x octane rating) / (A+B) = Avg. Octane

A = amount of premium fuel in the tank

B = amount of high octane fuel in the tank

So say 5 gal of 91 octane + 10 gal of 104 (GT260+)

(5 x 91) + (10 x 104) / (5 + 10) =

455 + 1040 / 15 =

99.7 octane

Not at all. Dragstrips differ in altitude, weather, track surface, and track prep. Even the same track on the same day will change dramatically depending on temperature and surface treatment.

The SRT Demon user guide says to be in Drive, but you can use Line lock in either Auto or Manual modes. If you’ve made sure line lock is on and you achieved the minimum brake pressure, (we recommend 1200-1400psi), we have seen people go to the gas pedal before the brake pedal is all the way at the top of its travel. You have to wait for that to happen or the car will think you still have your foot on the pedal.

Depends on if you’re trying to win or just put on a show, but assuming you are trying to warm up the tires for a fast pass, you don’t need that much wheel speed. Stationary burnout only needs to be 2-3 seconds to get a decent amount of smoke going, then let go of the “OK” button and drive the burnout forward 10-feet or so to staging. If you have someone with you who can measure the tire temperature after the burnout you’re looking for 180-220 degrees Fahrenheit with the Nitto tires.

In Drag mode, you will have to start in First gear, but you can immediately shift to Second with the right paddle or the shifter once the tires start to spin. If you’re not in Drag mode, once you go to the M gate you can bump the paddle or the shifter and start the burnout in Second gear.

Line Lock can be cancelled on the same screen on the radio in which you turned it on. It will also cancel when you let go of the “ok” button on the steering wheel.

Practice makes perfect! You can practice the TransBrake process before going to the drag strip where people are watching you. You can run through all the steps of TransBrake in your driveway, all the way to releasing the last paddle to launch the car, just don’t add throttle at that point. Practice going to 1700 rpm when you’re in the first steps of TransBrake activation (pull both paddles back, place one foot on the brake and the other on the throttle) and hold the rpm steady the entire time. If you try to push close to 2350 with the engine in torque reserve, there are flares in the rpm that can inadvertently push you over the 2350 limit and kick you out. Getting those steps ingrained so it becomes second nature makes a big difference!

The TransBrake will cancel from the steering wheel turning, but only at +/- 45°, so there is a lot of room there.

The TransBrake was engineered so the driver can still control the throttle rate. That way, when you are at a lesser-prepped track, you can slow the throttle rate to maintain grip. This gives the driver much more control.

1200-1500 rpm is a pretty good rpm to launch from, use your throttle feed rate to control tire slip. The TransBrake will go up to 2350 rpm if the track will hold it.

RPM is limited to 2350 to maintain the durability of the driveline.

To get torque reserve when you’re in the two-foot process of the TransBrake you need to bring the revs up pretty quickly. There is a minimum rpm you have to keep (just a little over idle), to maintain torque reserve on. If it does drop out of reserve, take your foot off the gas, let it come back to idle and then go into the gas again and it will come back on.

Launch Control is really intended for un-prepped surfaces rather than sticky drag-prepped surfaces. Foot-braking or the TransBrake are superior launch methods for a prepped track. But let’s say you want to try out launch control on a prepped track. Here’s how. Set the rpm you want before moving to the starting line. After you do your burn out, pull forward and turn on the pre-stage lights, press the button on the center console, make sure that the button lights up indicating it’s on, then creep forward to full stage. Take one quick glance to make sure the button light is still on then mat the gas quickly. Launch Control will time out if your foot is on the floor longer than 5 seconds. Launch Control will also cancel out if the car moves forward a large distance, but the creep from pre-stage to full stage isn’t enough to turn it off.

The chiller will do a great job of keeping temperatures down during hot lapping. If you are not hot-lapping, start the car for a couple seconds a few minutes before you head up to the staging lanes to let the after-run cool it off. Once the after-run completes its cycle, start it up and put it in drag mode to run the chiller and that will get the intercooler to its coolest temperature.

Yes, and the concierge and dealer can help direct you to the best place to purchase everything from customized car covers to a rear-seat delete package, to the Racelogic VBOX Video HD2 System.

Order through Concierge:

Authentication Package: $1.00 – authentic build sheets for your VIN, unique carbon fiber ID card, document portfolio

Custom Car Cover: $695.00 – satin stretch indoor cover, matching your paint scheme and optionally embroidered with your name

Order through Dealer and Mopar Performance:

SRT Demon Street Tire Package: Late Availability – Mopar Part Number 82215919 includes a set of four lightweight forged 20x11-inch Devil’s Rim wheels (stock wheel for Hellcat Widebody) and are delivered ready to bolt onto the vehicle with Pirelli 305/35ZR20 performance tires mounted and balanced with Tire Pressure Monitoring System sensors.

Rear-seat Delete Package: Late Availability – Mopar Part Number 82215918 allows you to remove the rear seat when heading to the track. The Rear-seat Delete Package includes seatback closeout panel, SRT Demon seatback panel bezel, lower seat tray with cargo net, seat belt delete C-pillar covers and rear packaging shelf to cover the tether holes.

Order through Speedlogix and Racelogic:

Speedlogix Four-Point Harness Bar: In its standard configuration, the SRT Demon’s rear seat is deleted and mounting points are made accessible, making it easy to install the bar without cutting or drilling.

VISIT SPEEDLOGIX for more information

Racelogic VBOX Video HD2 System: Available from the producer of the industry standard VBOX systems, is the exclusive SRT Demon VBOX Video HD2 data logger and in-car camera system.

VISIT RACELOGIC for more information