Rumored 909-hp Dodge Challenger kills a demon with E85

The Dodge Demon is sacred to SRT. Although the Challenger and Charger Hellcats have developed sharper claws over the years, none have matched the Demon’s output. Even the Challenger SRT Super Stock stops just short of the Demon’s power level. But according to a new rumor, the Dodge Challenger is about to commit heresy with the help of some E85.

Word on the street is that a 909hp E85-powered Dodge Challenger is in the works

2018 Dodge Challenger SRT Demon burnout | Stellantide

If you need a refresher on the madness of the Dodge Demon, here are the highlights. Officially named the “Challenger SRT Demon”, it’s basically a Challenger Hellcat built entirely for the dragstrip. And one of the keys to its revolutionary ¼ mile speed is its transmission.

Dodge took a 6.2-liter Hellcat V8 and added a bigger supercharger, bigger hood scoop, improved fuel system, stronger transmission and beefier internals. The result was 808 hp on 93 octane gas. And as part of the $1 Demon crate, Dodge included an ECU tune that allowed this big muscle car to run on race gas. Filled with racing juice, the Demon puts out 840 horsepower, nearly 50 more than a Hellcat Redeye.

But even that might not be enough to help the Dodge Demon retain its infernal muscle car crown. According to “an anonymous source close to the project”, Dodge is developing an even stronger Challenger, Road & Track reports. With the help of E85, this Challenger supposedly produces 909 hp.

No, it’s not a typo. If that rumor is correct, Dodge will soon be selling you a Challenger that produces nearly four-digit horsepower. Talk about finishing on a hit.

Can E85 really help defeat the demon?

The supercharged 6.2-liter V8 under the hood of a red 2018 Dodge Challenger SRT Demon
Engine compartment Dodge Challenger SRT Demon 2018 | Stellantide

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As of this writing, Dodge has not officially commented on this rumored E85-running 909-hp Challenger. But assuming Dodge is working on a final ultra-powerful Hurrah Challenger, is 909 hp really possible on E85? Technically, yes.

Whether you call it E85 or flex-fuel, it’s a blend of 85% ethanol and 15% gasoline, hence its name. Now, ethanol isn’t as good for the environment as some had hoped. Plus, it’s not as fuel-intensive as gasoline, so flex-fuel cars use less gas. But it is ideal for power hungry tuners, especially those running turbocharged and supercharged engines, as it is a high octane fuel. While premium gasoline is typically 93 octane, E85 typically has an octane rating of 100 to 105. For comparison, most racing gas mixtures have an octane rating of 100 to 120.

The higher the octane rating of a fuel, the more resistant it is to knocking, i.e. ping. This is essential for producing enormous power with forced induction motors, as they put a lot of strain on their components. With higher octane fuel, a tuner can add boost pressure, make ignition timing more aggressive and thus increase horsepower. In addition, like methanol, E85 releases less heat during combustion. As a result, the engine stays cooler, which also helps it produce more power.

Now, in addition to hardware modifications, a car needs ECU tuning to extract the maximum performance from E85. But Dodge could totally do it at the factory level; Demonic $1 crate, remember? Plus, this 909-hp Dodge Challenger wouldn’t be the first performance car to run on E85. The Koenigsegg Jesko, for example, needs E85 to reach its maximum of 1600 hp.

So yes, Dodge could theoretically make a Challenger develop 909 hp using E85. Whether this hyper Dodge Challenger would be a challenger for the Demon is still up in the air.

Can you run your own Dodge Challenger on E85?

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Since this is an anonymous rumor at this point, it’s hard to say when or if this hypothetical Challenger will come off the cover. But since Dodge is ending Challenger production after 2024, this supposed E85-powered devil might not stay in the shadows for long. R&T estimates official news by the end of the year.

In the meantime, several stores offer E85 conversion kits for current Dodge Challenger models. eFlexFuel, for example, offers it for naturally aspirated Hellcat and V8 models starting at $700. However, it should be noted that these kits are not street legal. And even if you find one, some states might not allow you to register your tuned Challenger.

Still, it’s one way to get your own E85-powered Demon Slayer.

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