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When Ford debuted the Shelby GT350 Mustang at the LA Auto Show last year, we were told it'd have more than 500 horsepower and over 400 pound-feet of torque. And indeed it does; Ford confirmed today that its hot 'Stang will have 526 hp and 429 lb-ft.

Compared to the GT350's main rival, the Chevy Camaro Z/28, that's an increase of 21 hp, but a loss of 52 lb-ft. That said, this Mustang packs some serious prowess, especially in its most hardcore GT350R trim. It sounds pretty wicked, too.

Perhaps most impressive is the price point for the 2016 Shelby GT350. The standard car comes in at $47,870, while the GT350R will command $61,370 – a big drop over the Camaro Z/28 and it's $73,300 sticker price (including destination but not gas guzzler charges).

Ford confirmed the power output news at a media briefing today near its headquarters in Dearborn, MI. Stay tuned for more information as it becomes available.

http://www.autoblog.com/2015/06/02/...-mustang-horsepower-torque-confirmed/#image-2
 

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Yeah that is definitely not too shabby and obviously room for improvement later on. Plus that power plant should have a nice meaty power band.
 

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I wonder how much the faster revving GT350 will be able to overcome that torque deficit? In typical street use (i.e. street light drags) it's likely to trail the Z28, maybe even the SS, but on a track where you keep the revs higher it'll overcome I'm sure, or better yet, I hope.
 

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This engine will be a darling on a road course, but even on a 1/4 mile track, fast and high revving small V8's not only run with big bore engines, they often pass them by. You are moving a lot of air through that glorified air pump when spinning at 8400rpms.

You tube search for high rpm drag motors
 

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526-HORSEPOWER FORD SHELBY GT350 MUSTANG EXCEEDS 100 HORSEPOWER PER LITER WITH NEW 5.2-LITER FLAT-PLANE V8

At 102 horsepower per liter, the all-new 5.2-liter V8 for Shelby GT350 Mustang and Shelby GT350R Mustang is both the most power-dense and the most powerful naturally aspirated road-going engine in Ford history

- All-new Ford 5.2-liter flat-plane crankshaft V8 – an engine unique to Shelby GT350 and Shelby GT350R – produces 526 horsepower and 429 lb.-ft. of torque

- With a redline of 8,250 rpm, the all-new 5.2-liter engine is the highest-revving production V8 in Ford history


Dearborn, Mich., June 2, 2015 – Its crankshaft may be flat, but its power output is anything but “plane.”

Ford announced today the most powerful naturally aspirated road-going engine in its history. The all-new Ford 5.2-liter flat-plane crankshaft V8 will produce 526 horsepower and 429 lb.-ft. of torque in Shelby GT350 Mustang and Shelby GT350R Mustang – an engine unique to the two models set to go on sale this fall.

“The Shelby GT350 program began with a clear objective – create the most balanced, nimble and exhilarating production Mustang yet,” said Jamal Hameedi, Ford Performance chief engineer. “Every change we made to this car was driven by the functional requirements of a powerful, responsive powerplant. The high-revving, naturally aspirated 5.2-liter flat-plane V8 delivers on every target we set – high horsepower, broad torque curve, aggressive throttle response and light weight.”

The all-new 5.2-liter V8 is not only Ford’s most powerful naturally aspirated engine ever, but also its most efficient in terms of specific output. Without turbocharging or supercharging, the flat-plane crankshaft V8 produces 102 horsepower per liter of displacement. The new engine is also the highest-revving V8 in Ford history – with a redline of 8,250 rpm.

Unlike traditional V8 engines, the all-new 5.2-liter uses a flat-plane crankshaft more typically found in a Ferrari sports car or in racing applications. The design of this new engine for the Shelby GT350 was optimized using computer-aided engineering and fully digital performance simulations. Millions of intake, cam and exhaust configurations were iterated before arriving at the optimal combination.

Better engine breathing delivers optimal power
Traditional cross-plane crankshaft V8 engines attach the piston-carrying connecting rods to the crankshaft at 90-degree intervals, creating a “cross” of counterweights when viewed down the axis of the crankshaft. In the all-new Ford 5.2-liter V8, the connecting rods attach to the flat-plane crankshaft at aligned 180-degree intervals – creating what looks like a flat line of counterweights when viewed down the axis of the crankshaft.

Beyond a change in the characteristic sound of an American V8, the flat-plane crankshaft helps improve cylinder exhaust-pulse separation by allowing a firing order that alternates ignition events between the V8’s two cylinder banks. This can vastly improve engine breathing, and subsequently allow the engine to make more power.

The result in the new 5.2-liter V8 – in addition to a uniquely exotic, delicious engine note – is 526 horsepower at 7,500 rpm and 429 lb.-ft. of torque at 4,750 rpm. Even more impressive is the track-tuned flexibility of the engine’s exceptionally wide powerband. It produces 90 percent of peak torque from approximately 3,450 rpm through 7,000 rpm, and features a racetrack-friendly spread of nearly 3,000 rpm between its torque and horsepower peaks.

In both Shelby GT350 and Shelby GT350R, the all-new 5.2-liter will be paired with a six-speed manual transmission as its only gearbox option. The Tremec TR-3160 six-speed manual is specifically engineered for less mass and high-rpm application in the new Shelby Mustangs. The six-speed features a lightweight, die-cast aluminum case and clutch housing for increased overall powertrain stiffness. Gear cross-sections, the dual-mass flywheel and dual-disc clutch are all optimized for an overall reduction in inertia and weight.

Other aspects of the new 5.2-liter V8 (actual displacement is 5,163 cubic centimeters) include a slightly oversquare bore and stroke of 94x93 millimeters, and a performance-enhancing 12.0:1 compression ratio. Computer numerical control-machined cylinder heads house camshafts that develop a massive 14 millimeters of lift for both the hollow-stem intake valves and sodium-filled exhaust valves. A single, fast-acting 87-millimeter throttle body – the largest ever used for a Ford engine – feeds air to the engine, allowing for a simpler, lighter intake.

Further reducing engine weight is a unique new aluminum engine block featuring Ford’s patented plasma transferred wire arc cylinder-liner technology. This process eliminates typical heavy iron cylinder liners with a deposition process. The forged-steel flat-plane crankshaft is “gun drilled” to reduce total engine weight and to improve bay-to-bay cylinder breathing. A lightweight, high-capacity composite oil pan contains baffling designed for sustained high-speed cornering and hard braking.

“A new Mustang as exceptional as the Shelby GT350 deserves an equally extraordinary engine,” said Dave Pericak, director, Ford Performance. “The all-new naturally aspirated 5.2-liter V8 perfectly fits the balanced dynamics of the Shelby GT350, and we believe this new engine will become a performance legend.”
 

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You forget the gearing advantage that will be thrown at the GT350 - if it were geared for the same speeds with both at redline, the GT350 would enjoy 17% greater torque multiplication and make more torque to the wheels through the powerband. Hopefully they will still have Z28's to test this against when it finally drops!
An interesting point made at GMI which I had never even considered!
 

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Colour me impressed with that band of power.

The numbers in isolation are not breathtaking but looking at the delivery of power the focus and bias is towards overall flexibility and not a peak number. A great effort. This is the better path to take when mass is not on your side.

V.E. is very high, higher than the Lamborghini Huracan's 5.2. Very impressive.
 
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