Ford says the 2007 Shelby Cobra GT500 Mustang will be the most powerful factory-built Mustang in history, more powerful than the 1969 Mach 1 428 Super Cobra Jet or even the legendary 1969 Boss 429. Think about that for a second. Let it sink in. Mustang worshipers may take a knee if you have to, but the reality is this: When this car hits the streets during the summer of 2006, it'll have 470-plus horsepower, making it the most powerful Mustang ever built.
Supercharged 5.4-Liter- The Shelby's supercharged 5.4-liter, 32-valve V8 is similar to the engine in the GT. Ford started with the cast-iron 5.4-liter Triton V8 truck engine and added aluminum heads from the GT, specially calibrated camshafts, a Roots-type supercharger making 8.5 pounds of boost, and a water-to-air intercooler.
That's a supercharged 450-plus-horsepower, supercharged 5.4-liter V8. The rear air splitter is flanked by chrome exhaust tips and all developed for curved road racing wins.
A screw-type supercharger with an air-to-water intercooler, generating 9 pounds of boost, forces air into the cylinders, each of which has four valves. Many of the engine components, such as the aluminum piston heads and bearings, came from the development of the Ford GT. A T56 six-speed manual transmission is also part of the GT500's powertrain, but there's no technological innovation here. The T56 is a tried-and-true, race-proven transmission that is very capable of handling the V8's horsepower. The gearing is evenly spaced to allow the engine to use all of its torque to drive the rear wheels. So what does all that hardware get you? According to Ford, the GT500 will generate 500 horsepower at 6,000 rpm and 480 lb-ft of torque at 4,500 rpm
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