How Much Power Has The Shelby GT500 Lost After 182,271 miles? - story fullscreen Fullscreen

How Much Power Has The Shelby GT500 Lost After 182,271 miles?

How much Power is lost after 182,217 miles? This Ford Mustang Shelby GT500 gives the Answer

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When owning a performance car, every bit of horsepower counts. That said, over time, wear and tear takes its toll on performance and some of those horses run away. Of course, it mainly depends on how the engine has been treated, both in terms of driving and maintenance. Mileage also takes its toll on the mechanical components of a car. But just how much power (if any) is lost over time? This “tired” Mustang Shelby GT500 answers that.

How Much Power Has The Shelby GT500 Lost After 182,271 miles?
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The guys at Late Model Restoration (LMR) have given us a video on their YouTube channel, in which one of their representatives has bought a high-mileage, 2012 Ford Mustang Shelby GT500.

“She’s got some miles on her”, Jay Walling, the owner of the car, says, as we see 182,271 miles (293,336 km) on the odometer.

This being a 2012 model, it’s equipped with a 5.4-liter (not the 5.8) supercharged V-8 that puts out (or at least it did) 550 horsepower and 510 pound-feet (692 Nm) at the flywheel.

Power, of course, goes to the rear axle, through a Tremec 6060, six-speed manual gearbox. According to Landan, we can expect a drivetrain loss of 12 to 15 percent, which is normal for a front-engine rear-wheel-drive layout.

How Much Power Has The Shelby GT500 Lost After 182,271 miles?
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The first dyno pull shows very good values, as it measures 465 rear-wheel horsepower at 5,800 RPM and almost 475 pound-feet (644 Nm) at 4,000 RPM. The second run, however, shows lower numbers – 450 horsepower at the wheels and almost 471 pound-feet (639 Nm).

While testing, they found that the intercooler pump was not working properly due to a bad relay. After going around the minor hiccup, the guys at LMR did an after-pull, which revealed 486 horsepower at 5,900 RPM and 486 pound-feet (659 Nm) at 4,200 RPM to the wheels.

Accounting for a 12-percent drivetrain loss, it is revealed that this 2012 Shelby GT500 is still capable of 550 crankshaft horsepower and 510 pound-feet (692 Nm), despite showing 182,271 miles (293,336 km) on the “clock”.

Dim Angelov
Dim Angelov
Born in 1992, I come from a family of motoring enthusiasts. My passion for cars was awoken at the age of six, when I saw a Lamborghini Diablo SV in a magazine. After high school I earned a master’s degree in marketing and a Master of Arts in Media and Communications. Over the years, I’ve practiced and become skilled in precision driving and to date have test driven more than 250 cars across the globe. Over the years, I’ve picked up basic mechanical knowledge and have even taken part in the restoration of a 1964 Jaguar E-Type and an Alfa Romeo Giulia Sprint. Lately, I’ve taken a fancy to automotive photography, and while modern cars are my primary passion, I also have a love for Asian Martial Arts, swimming, war history, craft beer, historical weapons, and car restoration. In time, I plan my own classic car restoration and hope to earn my racing certificate, after which I expect to establish my own racing team.  Read full bio
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