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Old 11-07-2012, 08:27 PM   #19
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Join Date: Feb 2007
Location: PA
2008 Impreza
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Originally Posted by daveyboy View Post
I was trying to point out that I think it is completely unfair to call the ecoboost a "truck engine" because certain peripheral items are changed from the original car application--but then call the 5.0, the Hemi, etc "car" engines.

Based on your own logic, the 5.0 and Hemi are truck engines too since they do not run the same camshaft(s) etc, and are tuned for truck duty... .
Nope, that's not my logic. Ford did those changes in an effort to offer low rpm torque. They succeeded and it's an engine capable of truck duty, heavy payloads and towing. It's a truck engine because it has a truck's low end torque curve. The fact they were able to design an engine that could operate at both ends of the spectrum with two totally different torque curves is quite remarkable. It's truly both a truck and a car engine platform. It was designed from the beginning to go into both vehicles, and the engineers hit their mark. Just because it was first released in the taurus doesn't make it a car engine. it takes years to get an engine and vehicle down the pipeline and out into production.

Dodge tried to do the same with the Hemi but didn't do anywhere near as good a job. The torque curve is still very car like and the engine really needs to rev to do the same duties. Like i said, it needs to downshift far more often, lags as it tries to get up into it's power band and the engine loves to stay in those high revs trying to climb a small grade. It's not going to hurt the engine and it's capable of doing so, but again, not the ideal truck engine. If they made the stroke longer, it would have more low end torque and the power band would be more ideal for truck duty. But then that would require a completely different block/engine altogether and the engine would suck for car performance.
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