Tire Explodes As Mustang GT Pulls 150mph On Dyno

If you’re a gearhead, then you’ve probably wondered how much horsepower your ride actually has. And if you’re curious, we are here to guide you so that you don’t end up like the poor fella in the below video. In a nutshell, you’ll need to use a chassis dyno, which is designed to measure how much horsepower and torque is present at the drive wheels. In the below video, the unlucky guy was simply trying to figure out how many horses his pony car made, when disaster struck. The back tires on his Mustang GT 5.0 were turning at 150 mph, when suddenly one of them exploded like an atom bomb. There’s a big difference between crank horsepower and wheel horsepower, and a “rolling road” can tell you exactly what you’re working with. Check out the insanity in the below video and join us as we attempt to dissect what went wrong.

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What is a Chassis Dyno?

A dynamometer is a complicated device that’s used to measure the output of something, like an engine. Automakers and engine builders use a hydraulic engine dyno to measure the horsepower and torque that an engine produces at its crankshaft (i.e. crank horsepower) or flywheel. Without a driveline load, the engine builder is able to determine the raw output, then tune the engine to meet the desired specifications. An engine dyno can also be used to ‘break in’ a motor, by subjecting it to a constant load for an amount of time that equates the desired mileage (usually 1,000 miles).

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A chassis dynamometer, or chassis dyno (also referred to as an inertia dyno), is a complicated device that’s used to measure the horsepower and torque that a vehicle is producing at its drive wheels. Commonly referred to as ‘wheel horsepower’, this figure will differ from the raw crank horsepower, because a certain amount of power is lost to the driveline (it takes energy/power to operate the transmission, driveshaft(s), axle(s) etc.). The accepted loss rate is around 15%-20%, depending on who you ask.
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To measure wheel/rear wheel horsepower, a chassis dyno uses a set of fixed drums or rollers, which are connected to a bunch of sensors and a computer. As the vehicle’s tires spin the drums/rollers, a computer calculates how long it takes to spin their known mass. To get an accurate measurement, the vehicle’s transmission should be in the 1:1 gear (a transmission is designed to multiply power, so a higher 1:1 gear basically means the engine and the transmission are moving at the exact same speed), which is probably why that Mustang GT in the video was in 5th gear.
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  • http://www.cidpusa.org/ Imran Khan

    Over Inflated tires obviously

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