2013 Mustang Engine Information – 351 cubic inch V-8 (5.8 L Trinity V8)
The GT500 5.8L Trinity
The 2013 Shelby GT500’s 5.8-liter V8 aluminum-block engine produced 662 horsepower and 631 lbs.-ft. of torque, making it the highest-horsepower engine ever produced in North America to date. Nearly every part of the powertrain was optimized for producing the additional horsepower, including a new supercharger, new cross-drilled blocks and heads, an all-forced engine rotating assembly, updated camshaft profiles, upgraded head gaskets, a new carbon fiber driveshaft and upgraded clutch, transmission and axles.
The biggest news for the 2013 Shelby Mustang GT500 is a substantial increase in power, coming from changes in two areas. First, Ford’s engineers have bored out the all aluminum 5.4 liter engine, which made it’s debut in 2011 to a full 5.8 liter V8. The second source of more power for the 2013 GT500 Mustang is the addition of a new, more efficient Eaton TVS supercharger. The combination of this technology and other incremental improvements and refinements results in the 5.8 liter engine cranking out 662 horsepower and 631 lb/ft of torque through the beefy, externally cooled Tremec TR6060 transmission.
Let’s dive into the Trinity power plant. To create the Trinity supercharged V8, engineers used the aluminum engine from the 2011-2012 GT500 as a starting point; its self an evolution of the engine that powered the Ford GT. The cylinder bore of the aluminum block was enlarged from 90.2 millimeters to 93.5 millimeters while the 105.8 millimeter stroke remained the same. With this change engine capacity grew from 5.4-litres to 5.8-litres. Like the 2011-2012 GT500 Ford employed its patented Plasma Transferred Wire Arc process to line the cylinder bores and installed billet main-bearing caps. The compression was raised from 8.4:1 to 9.0:1 to help extract every last bit of horsepower. To cope with the stresses of the higher horsepower, the engine had a larger oil pump hidden inside the aluminum sump along with piston oil jets. The block was modified with additional coolant passages to help remove excess heat.
Bolted atop the block was a pair of aluminum cylinder heads with improved coolant flow, Ford GT cams, 37.0 millimeter intake valves and 32.0 millimeter exhaust valves. To keep the heads sealed to the block new 5-layer MLS head gaskets were used that could stand up to the increased abuse that the higher compression ratio and supercharger boost. A gorgeous pair of a valve covers painted in “Ford Blue” with a crinkle finish was bolted to the heads. Topping off the Trinity V-8 was higher capacity Twin Vortices Series 2300 supercharger that displaced a whopping 2.3-litres and could pump out a maximum boost of 14 pounds per square inch. In fact the supercharger is so large that it takes over 100-horsepower to operate. With higher boost comes more heat and to counter this engineers added cooling capacity with a huge radiator, a larger fan, a higher-flow intercooler pump, and a three row intercooler replaced the two-row unit from the previous car. All the changes cumulated into an engine that could handily out gun the previous GT500 by 112-horsepower making the Trinity most powerful production V-8 in the world.