I see the 3.5 Liter EcoBoost is rated for 420 ft-lb of torque and is supposed to get fairly impressive fuel economy. Has anyone considered the effects of scaling one of these up to the 12-15 liter size commonly used in heavy-duty trucks? The typical fleet truck produces between 370-450 HP with 1500 lb-ft of torque and gets in the neighborhood of 6 MPG with a full load, running 13 liter turbo-diesel straight 6 engines.
With recent emissions regulations targetting all diesels, requiring Urea/DEF and DPF filters, I think the idea of a heavy duty ecoboost engine makes a lot of sense. It could be produced at a far cheaper cost, and as long as it got the same fuel economy and reliability, it would be a very popular engine - especially since it would have reduced maintenance and lower per mile cost without having a DPF filter or DEF injection system.
Ford would have to produce heavy-duty trucks again for this one - everyone makes their own engines now, not like it was in the 1990's when you could get any engine in any truck.
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