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Barth/Berge tuned Demon runs 9.42 at 2140 DA

by Patrick Rall on

The F8 Green Dodge Challenger SRT Demon owned by John Harding and tuned by the joint effort of Tim Barth and AJ Berge headed to Great Lakes Dragway last night although conditions werent ideal, there result ETs were very impressive. With the only changes from stock being different wheels and tires, larger fuel injectors and a PCM/TCM tune from the team of Tim Barth and AJ Berge, this Demon covered the quarter mile in just 9.429 at 146.67 miles per hour. That is a quicker elapsed time than any other tune-only Demon, even beating many Demons with aftermarket pulley setups.


In short, this is the quickest stock-boost Demon in the world, running better times than cars running extra boost, even though the density altitude was less than ideal.

Demons in the Details

Let’s start with a complete rundown of the modifications made to this 2018 Dodge Challenger SRT Demon.

On the outside, it has Billet Specialties 17-inch wheels out back, wrapped in Mickey Thompson drag radials, with a lightweight “skinny” setup up front. On the inside, it had the standard one-seat configuration for the 9.42 run, but with the full interior, this same car ran a 9.52 at 145.74 earlier in the evening.


Finally, the key upgrades made to this 2018 Demon include a larger set of fuel injectors, a tank full of E90 ethanol blend and, of course, the engine and transmission tune from Tim Barth and AJ Berge using Diablo software.

With that short mod list, which is basically wheels, tires, injectors and a world-class tune, this 2018 Demon laid down a 9.429 at 146.67 miles per hour. Mind you, that number was run at 2,140 feet of density altitude while most record times have been run in negative DA. This means that when Harding’s Demon does get down into the negative DA figures, the car is going to go quite a bit faster.

In fact, in speaking with Tim Barth, he believes that in negative density altitude, a bit more tuning work will put this Demon in the 8-second range without any other major physical changes, so while other tuners are adding pulleys, exhaust and other aftermarket parts to get into the low-9s, Barth and Berge are aiming for 8s with just a tune and injectors. Needless to say, we will keep you posted on their progress in the coming weeks at temperatures and DA drops.

Patrick Rall was raised a Mopar boy, spending years racing a Dodge Mirada while working his way through college. After spending a few years post-college in the tax accounting field, Patrick made the jump to the world of journalism and his work has been published in magazines and websites around the world.

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