pnichols wrote:
I don't know a lot about Ford's EB technology. But .... what about it prevents scaling it up to higher liter size engines?
In other words for example, why can't Ford offer a 6.5 to 7.0 liter EB "medium truck" V8 that just happens to -> be around 400 HP, with around 450 ft-lbs. of torque, and attain average mileage of around 12 MPG? :h
As duty cycle goes up, fuel consumption goes up. An EcoBoost at full load actually uses a little more fuel than its naturally aspirated counterpart with the same HP. At that point, the efficiency benefit is lost, but you add lot more complexity and heat to the system, which reduces durability.
BTW - the EcoBoost 3.5L is already capable of 450 HP, and can be turned on with a quick programming change. However, that won't meet Ford's durability testing target for light trucks, and the current 365 tune won't even meet targets for Medium-duty use, which is why the Transits only get 310 HP, and it's not even available in full-profile applications.