Let me educate you.
When the 3.5L V6 EB comes out in the Ford GT, it will be an all new EB. IN other words, it shares nothing with the current EB in the 2015 F150.
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Calling the 3.5-liter EcoBoost V6 that's destined for the new Ford GT and second-generation Raptor pickup a high-output version is a bit disingenuous. Ford basically wiped the slate clean to make it, retaining only the displacement measurement—and, you know, the fact it has six cylinders in a vee configuration fed by turbochargers and direct injection.
It starts with a new block, heads, pistons, and intake, plus bigger turbos. Ford adds a dual-injection system, a combination of port and direct fuel injection, like Subaru uses on the BRZ/FR-S motor. That makes the H.O. 3.5 the first and only EcoBoost engine to use port injection. Ford calls this a second-generation EcoBoost, so maybe that dual-injection scheme will spread to other engines."
So why did Ford choose a smaller engine? Simply put, to go racing at lemans:
https://youtu.be/nVa4mlFZEmM
If the Ford GT were to run let's say a v8 EB then they would be heavily penalized at Le Man. So Ford developed a smaller engine to go racing. And to not waste too much money on a race car and also a super sports car (GT), the technology will trickle down to the Raptor. As of right now, only the GT and 2017 Raptor will use this new 3.5L V6 EB. Numbers have not been released but this new engine will put out 600hp easily in the GT. I know the Raptor will have a detuned version (smaller turbos) but I think guys would be ecstatic if the 2017 raptor were to put out 500 foot-pounds and 500HP ... and have the possibility of much more.