2018 Demon Is First Production Road Car to Run on Race Gas

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The 2018 Dodge Challenger SRT Demon will run on 100-octane race fuel, thanks to a second PCM and a revamped fuel system.

The final teaser video of the 2018 Dodge Challenger SRT Demon came online today along with a press release explaining that the newest Mopar muscle car will be the first ever production road car to be designed to run on 100 octane unleaded race gas. Mind you, the Demon will still run on normal “pump gas”, but to unlock the full potential of the new Demon, owners will have to fill the tank with 100+ octane gasoline.

This is capable because in the Demon Crate is a specially tuned Powertrain Control Module which is programmed to advance the engine parameters to make the most of the high octane race gas. The Demon Crate also comes with a new switch panel for the center stack, which as you can see in the image above, includes a High Octane race gas button.

For normal daily driving, owners of the 2018 Challenger Demon can run 91 or 93 octane (depending on what is available in their area) and they can make lots of power, but for a day at the track, they will want to run the tank as low as possible and replace the normal pump gas with high octane (100+) unleaded racing fuel. Once that high octane fuel is in the tank, the driver pushes the High Octane button on the center stack and the supercharged Hemi automatically adjusts to make peak power. In the event that you fill the tank with 100 octane, but there was enough lower octane fuel in the tank to bring the total octane rating below the required 100 – the system will automatically shift back to the non-race gas mode to protect the engine internals from the harmful impact of detonation.

Unfortunately, we don’t know the power numbers, but we can expect that the new Demon will offer significantly more power than the Hellcat – especially with the race gas mode engaged.

Finally, in addition to the specially programmed PCM and the race gas button on the dash, the 2018 Challenger SRT Demon will come equipped with dual fuel pumps, larger injectors than what is found in the Hellcat and higher volume/higher pressure fuel rails – all of which will work together to keep this hungry Hemi well fed when it is chewing up the competition.

Longtime auto journalist Patrick Rall contributes to Ford Truck Enthusiasts, Rennlist, Club Lexus, F-150 Online, and YotaTech.

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