The addition of a new 2.3-liter EcoBoost engine brings turbocharging back to the Mustang powertrain lineup.
Turbocharging was part of the Mustang’s powertrain choice in the early eighties with models like the SVO.
The new EcoBoost engine was designed specifically for the Mustang said Ford, to meet the needs of drivers looking for outstanding performance and fuel efficiency.
This being said, Ford has not yet revealed fuel efficiency data for any 2015 Mustang engine.
According to Ford, the geometry of the EcoBoost intake manifold and turbocharger housing has been optimized to provide better breathing and higher output in Mustang. Producing 310 horsepower and 320 pound-feet of torque, the 2.3-liter EcoBoost engine is said to fit the bill for a true Mustang powerplant – with the highest power density yet from a Ford engine.
“This EcoBoost engine delivers the healthy output Mustang drivers expect, regardless of the car’s speed,” said Scott Makowski, EcoBoost powertrain engineering manager. “It delivers where a Mustang driver expects it to – with a broad, flat torque curve and great driveability under any conditions.”
Ford explained the newest member of Ford’s global EcoBoost engine family, the 2.3-liter continues to take advantage of state-of-the-art technologies including direct fuel injection, twin independent variable camshaft timing and turbocharging to produce big-engine power and torque with improved fuel efficiency.
This 2.3-liter EcoBoost is the first Ford engine to use a low-inertia twin-scroll turbocharger that provides quicker boost response while enabling lower emissions and improved efficiency, stated Ford. The cylinder head features an integrated exhaust manifold that separates the inner and outer pairs of cylinders into each of the two inlet passages to the turbo.
Ford also explained keeping the exhaust pulses separated from the next cylinder in the firing order virtually eliminates mixing losses and maximizes the pulse energy to the turbine wheel. The result is similar performance to a more complex twin-turbocharger configuration, meaning quicker turbine spin-up and torque delivery when the driver needs it for passing maneuvers. The separated exhaust ports also enable the exhaust valves to stay open longer for reduced pumping losses that improve specific fuel consumption compared to a single-scroll turbocharger configuration.
With a compact engine generating nearly 135 horsepower per liter and more than 139 pound-feet of torque per liter – powering a performance car whose drivers are more inclined to use it – ensuring engine durability was critical, said Ford. Enhancements to the Mustang EcoBoost engine to withstand the added stresses include:
- Forged-steel crankshaft
- Piston-cooling jets
- Steel piston ring carriers
- Premium bearing materials
- Upgraded valve seat materials
- Forged-steel connecting rods
- High-pressure die-cast aluminum cylinder block with ladder-frame bearing caps
- Deep-sump, die-cast aluminum oil pan