The Viper ACR - with "ACR" standing for "American Club Racer" - is an extreme, track-tuned version of the Dodge Viper SRT-10.
The ACR version of the Viper is, to cut right to the chase, a brutally efficient racing machine that is only a hair’s breadth away from being illegal to drive on the street (in fact, to do so, you’ll have to unbolt the front chin spoiler first). The vent-studded hood and massive rear wing are probably going to be the first clues that this is no ordinary Viper. In fact, the ACR has been optimized for two things—lower weight and higher downforce. What’s not part of the package is additional horsepower, because as anyone that’s spent time in a Viper SRT10 should know, it’s not necessary at all. If you need more power than what the ACR provides, you’re probably not driving it correctly. However, anyone would appreciate the uprated brakes, harder track-focused suspension, and race-ready alloy rims. It takes a brave driver to use the ACR hard without first getting to know its limits, and a braver one to attempt to unleash it on a public road, but for those adrenaline junkies who want a Viper that is as close to a Viper Competition Coupe as you could slap a license plate onto (if you really wanted to), then the ACR is your ticket.
The Viper SRT10 ACR features street-legal racing tires (Michelin Pilot Sport Cups), two-piece brake rotors, adjustable suspension, and significant aerodynamic improvements. The engine remains the same as in the standard Dodge Viper SRT10, though, as the power and torque are still 600 hp (447 kW) and 560 ft·lb (759 N·m), respectively.
The SRT10 ACR's weight was also decreased using the "Hardcore Package", which removed the AC, radio, speakers, amplifier, trunk carpet, hood pad, and tire inflator, all for removing 40 lb (18 kg). The SRT10 ACR is capable of a downforce of up to 1,000 lb (4.45 kN) at 150 mph (241 km/h), roughly 10 times more downforce than the standard Viper SRT10 at the same speed.
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The Dodge Viper SRT10 ACR is a handling-focused car, meaning that it excels in tracks that feature intense curves. Its rear wing generates a large amount of downforce, facilitating quick cornering and braking. Because of the huge amount of downforce it makes, the Viper SRT10 ACR's top speed is limited to 166 mph (268 km/h) in the Forza Motorsport games and 191 mph (307 km/h) in Forza Horizon 3. The Viper SRT10 ACR's powerful V10 engine gives it a decent 0-60 mph time of 3.4 seconds, though. In summary, the Viper SRT10 ACR is best suited for tracks with medium to large amounts of complex turns and short straights.
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