Video Of The Day: How Did The Dodge Viper ACR Break 13 Lap Records?

Article Written by : Legendary Videos

You know the Dodge Viper ACR. It’s a top-dog Viper, the one with the radical ...

You know the Dodge Viper ACR. It’s a top-dog Viper, the one with the radical wing, a street-legal club racer with removable hood louvers.

It’s the domestic production vehicle that holds more lap records than any street-legal machine ever built—king of street-legal cars at 13 different tracks, faster than outrageous machinery like the 918 Spyder. How on earth did Dodge engineers build this world-beating machine—and price it under $100,000?

There is no secret to the Viper’s acceleration. It’s just straight-up brute force, with that 8.4-liter V10 kicking 645 hp and 600 lb.-ft. of torque to the rear wheels. Through the six-speed manual, and only the six-speed manual, boss.

But power is only the small part of the equation at the track. As you may have deduced from that giant-ass spoiler and splitter on the ACR, a secret to the baddest Viper’s performance has more to do with grip.

That’s where our pal Jason comes in. The lovably nerdy host of YouTube’s Engineering Explained has never shied away from getting down with the math to explain inner workings of the nerdiest car stuff. So, what’s the ACR’s secret? Is it a monstrous downforce? The custom-spec Kumho tires? Voodoo? Is it voodoo?

Jason Fenske breaks it down to first principles, calculating the maximum speed the ACR could achieve around the perfect circle before losing grip. For comparison, he also calculates the Vmax of the Ferrari 488.

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